To see the other types of publications on this topic, follow the link: Oceanographic research stations.
Journal articles on the topic 'Oceanographic research stations'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Oceanographic research stations.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Sari, Tri Widia, Yeeri Badrun, and Nofripa Herlina. "THE RELATIONSHIP OF PRIMARY PRODUCTIVITY OF PHYTOPLANKTON WITH OCEANOGRAPHIC PARAMETERS IN THE WATERS OF LUBUK GAUNG SUB-DISTRICT, SUNGAI SENIN DISTRICT, DUMAI." Asian Journal of Aquatic Sciences 6, no. 1 (May 4, 2023): 142–47. http://dx.doi.org/10.31258/ajoas.6.1.142-147.
Full textAbstract:
The waters of Lubuk Gaung Village, Sungai Sembilan District are areas that are widely used as transportation routes. Activities in these waters will cause environmental pollution, which affects the life of phytoplankton. The purpose of this study was to determine the relationship between the primary productivity of phytoplankton with oceanographic parameters in the waters of Lubuk Gaung Village, Sungai Sembilan District, Dumai. The method used is the survey method to determine the research station and the in situ method for measurement and sampling of oceanographic parameters. The results obtained are Oceanographic parameters from the three research stations, namely Brightness = 30 – 49 cm, Turbidity = 47.4 – 58.4 FTU, TSS = 124 – 209 mg/L, and BOD = 0.408 – 1.224 mg/L. The average value of primary productivity of the waters ranged from 48.07 to 79.69 mgC/m3/day. The value of primary productivity at station II is categorized into Oligotrophic, namely low waters. Stations I and III are categorized into mesotrophic waters, namely medium waters. The relationship between brightness, turbidity, and TSS with primary productivity has a very strong and positive (unidirectional) correlation value. The relationship between BOD and primary productivity has a very strong and negative (opposite) correlation.
2
Ha, Kyung-Ja, SungHyun Nam, Jin-Yong Jeong, Il-Ju Moon, Meehye Lee, Junghee Yun, Chan Joo Jang, et al. "Observations Utilizing Korea Ocean Research Stations and their Applications for Process Studies." Bulletin of the American Meteorological Society 100, no. 10 (October 2019): 2061–75. http://dx.doi.org/10.1175/bams-d-18-0305.1.
Full textAbstract:
AbstractThe main purposes for establishing the Korea ocean research stations (KORS) are for advancing an overall understanding of atmospheric and oceanic phenomena in the Yellow and East China Seas; for providing core scientific data for the studies on global environmental change, typhoon dynamics, biogeochemical cycles, marine ecosystems and fisheries, atmospheric chemistry involving Asian dust and aerosols, air–sea interaction processes including sea fog, and regional oceanographic process studies; and for functioning as ground stations of ocean remote sensing. Here, ocean–atmosphere time series observations with data service and case studies of KORS applications that will facilitate collaboration among researchers in the international atmospheric and oceanographic communities are presented.
3
Salihin, Abdilah, Amir Hamzah Muhiddin, and Inayah Yasir. "EVALUATION STUDY OF EUCHEUMA COTTONII SPECIES OF SEAWEED CULTIVATION BASED ON OCEANOGRAPHIC PARAMETERS IN PASIEA, BONEGUNU SUBDISTRICT, NORTH BUTON DISTRICT." Jurnal Ilmu Kelautan SPERMONDE 5, no. 2 (January 3, 2020): 51. http://dx.doi.org/10.20956/jiks.v5i2.8930.
Full textAbstract:
This study aims to determine the level of land suitability and the area of Eucheuma cottonii in Pasiea waters, to know the dynamics and correlation of oceanographic parameters towards the growth of E. cottonii seaweed. This research was conducted in August-October 2018 in the area of seaweed cultivation in Pasiea waters. The observation station consisted of six stations located in the area of seaweed cultivation. Oceanographic parameters dynamics were measured by oceanographic parameters measured which significantly affected the growth of seaweed species E. cottonii in the form of temperature, salinity, brightness, depth of flow, current velocity, nitrate, and phosphate has been mentioned before which wasthen overlaid on the map maker application to produce a map of the suitability level of E. cottonii seaweed cultivation in Pasiea waters. The results of the spatial analysis showed that the level of Pasiea waters suitability based on oceanographic parameters was in the less suitable category covering 1410 ha and did not match 1 Ha, whereas based on the daily growth rate of E. cottonii the overall research locations were in the excellent category of 1411 ha. The dynamics of oceanographic parameters were still within the range that can be tolerated for the growth of E. cottonii with parameters that correlate to the daily growth rate of salinity, brightness, phosphate, and nitrate.
4
Morozov, E. G., P. O. Zavialov, and D. I. Frey. "Oceanographic Investigations in the Tropical Atlantic (Cruise 52 of the Research Vessel “Akademik Boris Petrov”)." Океанология 63, no. 2 (March 1, 2023): 332–34. http://dx.doi.org/10.31857/s0030157423020090.
Full textAbstract:
Information is presented on the work performed to study the flow of Antarctic Bottom Water along the entire length of the Vema Fracture Zone in the tropical part of the North Atlantic Ridge and Russian-Brazilian field studies in the largest river plume of the World Ocean, on the shelf of the northern part of Brazil near the mouth of the Amazon River. A total of 46 stations were completed in the Vema Fracture Zone and 28 stations offshore Brazil. The new expedition that took place was an important step in the development of international scientific cooperation between the BRICS countries: Russia and Brazil.
5
Mekhova, O. S., D. A. Smirnova, and D. I. Frey. "Structure of Bottom Flows in Abyssal Channels of the Atlantic: Comparison of Autonomous and Vessel Observations in the Vema Channel, Romanche Fracture Zone, and Kane Gap." Океанология 63, no. 4 (July 1, 2023): 576–89. http://dx.doi.org/10.31857/s0030157423040093.
Full textAbstract:
Oceanographic data from measurements in deep-water channels of the Atlantic Ocean were analyzed. Data from two different methods were compared: CTD/LADCP measurements from research vessels and data from autonomous mooring stations. The comparison showed that discrepancies between the data obtained by two different methods can significantly exceed the instrumental accuracy of the instruments. This result highlights the importance of correct selection of mooring station locations in conditions of significant spatial gradients in measured characteristics. The results of the analysis showed that throughout the Antarctic waters pathway, the measurement differences are of the same orders of magnitude. Therefore, the conclusions can be valid for all abyssal channels with intense AABW flows.
6
Restiangsih, Y. H., I. M. Radjawane, A. Mamun, D. Kembaren, and E. Nurdin. "The relationship between Oceanographic Parameters and Fish Larvae Dispersal in the Fisheries Management Area of the Republic Indonesia (FMA) 717." IOP Conference Series: Earth and Environmental Science 925, no. 1 (November 1, 2021): 012032. http://dx.doi.org/10.1088/1755-1315/925/1/012032.
Full textAbstract:
Abstract Cendrawasih Bay and the Pacific Ocean are known as potential fishing areas and as fish spawning locations in Fisheries Management Area 717. Larval dispersal in the waters is strongly influenced by oceanographic parameters. This study was conducted to examine the relationship between oceanographic parameters and fish larval dispersal in FMA 717. This research was conducted using KR Bawal Putih III in November 2019. A number of 42 stations were determined for observation. Environmental parameters included temperature, salinity, dissolved oxygen, chlorophyll-a, turbidity, and photosynthetic active radiation (PAR), were measured using SBE 19 plus V2 CTD while pelagic fish larvae were collected using a bonggo net. Analysis of the correlation of oceanographic parameters with pelagic fish larvae abundance and spatial distribution was calculated using PCA (Principal Component Analysis) statistical analysis. The results showed that the pelagic fish larvae was influenced by temperature, salinity, PAR, chlorophyll-a, turbidity, and DO. Temperature and salinity have a direct interaction to the abundance of pelagic fish larvae.
7
Lintong, Oktavianus, Dannie R. S. Oroh, and Easter Ch M. Tulung. "STUDI EKOLOGI OSEANOGRAFI TELUK MANADO UNTUK PENENTUAN STRUKTUR ARTIFICIAL CORAL GARDEN DAN AREA MANGROVE SEBAGAI DESTINASI WISATA BARU." JURNAL PESISIR DAN LAUT TROPIS 7, no. 3 (November 25, 2019): 286. http://dx.doi.org/10.35800/jplt.7.3.2019.26446.
Full textAbstract:
The purpose of this study is to investigate the ecological conditions of mangrove ecosystems in the Manado Bay and analyze the suitability of the mangrove ecosystems as a new tourist destination, examine the oceanographic conditions in the Manado Bay area, study the data on the development of coral reef ecosystems to be able to produce artificial coral reefs and produce mangrove areas and coral reefs artificial as a new tourist destination. This research was conducted in April - September 2019 with the location of Manado Bay and the location of the Manado Bay coral reef ecosystem survey set at 3 sample points, equipped with 3 points in front of the BOBOCA Malalayang monument, in front of the Malalayang gas station and ANTRA Sario. Retrieval of coral reef data is by using the Line Intercept Transect (LIT) method. LIT observations were carried out with SCUBA diving at a depth of 6m. Observations were made by recording coral lifeforms found along the transect line, and calculating the percentage of the selection. The data taken is the percentage of dead coral cover, live coral, and type of life form, diversity index taken at 3 sample points. From field observations found on Site 2 (Front of Malalayang gas station) the condition of coral reefs is included in the good category, with the percentage of live coral cover (Hard Coral) of 55%. At this station found various types of coral growth, but the highest at this station is a form of growth of Coral Masive (CM) of 19.2%, while the least found were corals in the form of Coral Mushrooms (Mushroom Coral) with a percentage of 0.4 %. Then Site 3, namely in ANTRA Sario obtained from coral reefs is included in the bad category, with the percentage of live coral cover (Hard Coral) only 7.1%. Coral Diversity in the three survey stations is different. Of the three stations determined above the Tugu Boboca Malalayang site with an index value of 2.54, followed at site 2 namely the Malalayang gas station with an index value of 2.36 and the lowest at site 3 at ANTRA Sario with an index value of 1.33. Furthermore, oceanographic conditions in the Gulf of Manado region are seen in the receding period, most of the air moves westward at the beginning of the period, then moves northeastward in the next period. While in the tide period the water moves northward, starting the period and then it is seen moving northeast and at the end of the period, the east direction.Key words : Coral reef, Oceanographic condition
8
Androulidakis, Yannis, Christos Makris, Katerina Kombiadou, Yannis Krestenitis, Natassa Stefanidou, Chryssanthi Antoniadou, Evangelia Krasakopoulou, et al. "Oceanographic Research in the Thermaikos Gulf: A Review over Five Decades." Journal of Marine Science and Engineering 12, no. 5 (May 9, 2024): 795. http://dx.doi.org/10.3390/jmse12050795.
Full textAbstract:
The Thermaikos Gulf (TG) is a semi-enclosed, river-influenced, marine system situated in the eastern Mediterranean Sea, sustaining both urban coastal regions and ecologically preserved natural areas. Facing a plethora of environmental and anthropogenic pressures, the TG serves as a critical nexus where human activities intersect with marine ecosystems. The quality and health of the TG’s marine environment are tightly linked to the socioeconomic activities of the coastal communities comprising approximately 1.5 million inhabitants. The main features of the TG’s environmental dynamics and ecological status have been scrutinized by dedicated research endeavors during the last 50 years. This review synthesizes the seminal findings of these investigations, offering an evaluation of their contribution to research, their present collective impact, and their trajectory toward the future. A severe deterioration of the TG’s environmental quality was detected in the 1970s and 1980s when the treatment of urban wastewater was completely absent. A steady trend of recovery was observed after the 1990s; however, so far, the goal of a “good environmental state” mandated by national legislation and European directives has not been achieved. A clear reduction in research was detected after 2010, associated with the recession of the Greek economy, following the “golden period” for research in the TG from the mid-1990s until the late 2000s. The most important research gaps and uncertainties are discussed, while specific targeted recommendations for the improvement of monitoring and understanding of the physical, biochemical, and ecological state of the gulf are provided: (i) increase in permanent observational stations (temporally and spatially); (ii) inclusion of all major environmental parameters; (iii) monitoring of the quantity and quality of all land-originated freshwater discharges; (iv) monitoring and management of important aspects of the marine environment that have received minimal attention in the past (e.g., coastal erosion, plastic pollution); (v) development of accurate prediction tools (e.g., numerical techniques) to support first-level responders and efficient management; (vi) establishment of a supervising public entity that would support the holistic overview and management of the entire TG. These suggestions are directed at overcoming the existing uncertainties in the knowledge of the TG, safeguarding its ecological integrity and its role as a crucial link to marine biodiversity and sustainability in the Mediterranean basin.
9
Edwing, Richard, Chung-Chu Teng, and Robert Heitsenrether. "Technology Developments in NOAA's Real-Time Coastal Observing Systems." Marine Technology Society Journal 49, no. 2 (March 1, 2015): 122–37. http://dx.doi.org/10.4031/mtsj.49.2.15.
Full textAbstract:
AbstractThe critical need for real-time coastal oceanographic and meteorological measurements to support maritime forecasters, emergency managers, pilots, vessel operators, port authorities, coastal planners, and many other decision makers has rapidly grown, along with the variety of scientific research applications that rely on resulting long-term data records. To support the needs for such observations, the National Ocean Service Center for Operational Oceanographic Products and Services (CO-OPS) continues to maintain and develop the National Water Level Observation Network (NWLON) and Physical Oceanographic Real-Time Systems (PORTS®). Together, these networks consist of over 300 long-term, real-time observatories distributed across the nation's coasts. In situ data measured and disseminated in real time from NWLON and PORTS stations include water levels, ocean currents, waves, water temperature, conductivity, bridge clearance, visibility, and several meteorological parameters. CO-OPS invests heavily in analysis of emerging technologies to identify potential improvements in data quality and operating efficiency and to ensure that the evolving needs of its diverse user community are continuously met. Recent enhancements to the CO-OPS network include the transition to microwave radar water level sensors to increase accuracy and simplify installation and maintenance requirements; development and testing of nearshore wave measurement systems; development of standalone, bottom-mounted water level gauges for applications in remote Arctic areas; and expanding data communication capabilities to improve usage of the National Oceanic and Atmospheric Administration (NOAA) Geostationary Operational Environmental Satellites and to broaden use of the Iridium satellite system. An overview of the latest design features of typical CO-OPS real-time stations is presented, along with highlights of recent system developments and enhancements.
10
Amri, Khairul, Atiah Al Mutoharoh, and Dwi Ernaningsih. "SEBARAN LARVA IKAN DAN KAITANNYA DENGAN KONDISI OSEANOGRAFI LAUT SULAWESI." Jurnal Penelitian Perikanan Indonesia 21, no. 2 (June 15, 2015): 103. http://dx.doi.org/10.15578/jppi.21.2.2015.103-114.
Full textAbstract:
<p>Laut Sulawesi diketahui sebagai daerah penangkapan ikan yang potensial sekaligus diduga sebagai lokasi pemijahan. Berbagai jenis larva ikan pelagis maupun demersal ditemukan di perairan ini. Kelimpahan dan sebaran larva ikan di suatu perairan sangat dipengaruhi oleh kondisi oseanografi seperti temperatur, salinitas dan sejumlah parameter lainnya termasuk ketersediaan pakan. Untuk mengetahui pengaruh parameter oseanografi terhadap kelimpahan dan sebaran spasial larva ikan di Laut Sulawesi, telah dilakukan penelitian menggunakan kapal riset KR Baruna Jaya VII pada Oktober 2012. Parameter oseanografi yaitu temperatur dan salinitas diukur menggunakan iCTD dan sampling larva menggunakan bonggo net pada 18 stasiun pengukuran. Analisa hubungan kondisi oseanografi dengan sebaran larva dilakukan secara deskriptif dan pemetaan sebarannya dilakukan secara spasial. Hasil menunjukan keterkaitan sejumlah parameter oseanografi dengan kelimpahan dan sebaran spasial larva ikan. Sebaran larva famili Scombroidae dominan berada pada perairan bersalinitas tinggi karena merupakan jenis ikan oseanik. Larva ikan demersal banyak ditemukan di perairan sekitar Kep.Sangihe Talaud. Kelimpahan larva tertinggi ditemukan di perairan bagian utara dan barat lokasi penelitian dimana kelimpahan plankton tinggi ditemukan.</p><p> </p><p>Celebes Sea is known as a potential fishing and spawning grounds for several pelagic fish species. Abundance and distribution of fish larvae are allegedly linked to oceanographic conditions such as temperature, salinity and others oceanographic parameters including food availablity. To see the effect of oceanographic on the abundance and spatial distribution of fish larvae in the Celebes Sea, has conducted a research in October 2012using the research vessel KR Baruna Jaya VII. The measurement of oceanographic parameters including temperature and salinity and larval sampling were done respectively by using iCTD and Bonggo net at 18 measuring stations. The analysis of data was carried out for dertemining the effect of oceanographic condition to the fish larvae distribution and distribution mapping spatially of larvae abundance. Results show that there were a connection between fish larvae abundance and spatial distribution with oceanographic parameters. Scombridae larvae distribution was dominant at waters with high salinity condition because they are oceanic. Demersal fish larvae are mostly found in waters around Sangihe-Talaud islands. Highest abundance of fish larvae was found at northern and western part of research locations where the higher plankton concentration was found.</p>
11
Rossato, Fernando, and Ronald Buss de Souza. "OBSERVAÇÕES SOBRE A MODULAÇÃO DA CAMADA LIMITE ATMOSFÉRICA MARINHA DEVIDA À PASSAGEM DE UM SISTEMA FRONTAL NO ATLÂNTICO SUDOESTE." Ciência e Natura 38 (July 20, 2016): 388. http://dx.doi.org/10.5902/2179460x20278.
Full textAbstract:
Between 6-9 December 2012, the Oceanographic Vessel Alpha Crucis took oceanographic stations in the Southwestern Atlantic Ocean in support to both SAMOC and ACEx projects. During the research cruise, the vessel performed measurements with the release of weather balloons. From the data collected by the radiosondes, it was possible to verify the variability of the marine atmospheric boundary layer (MABL) in the area and period of study. From meteorological and oceanographic data, it was possible to estimate the latent and sensible heat fluxes from bulk parameterization. During an episode of formation of an extratropical cyclone, the results ,of this work demonstrate the impact of the synoptic conditions influencing the evolution of the MABL. During the prefrontal condition a stratification of the MABL was verified. The latent and sensible heat fluxes directed from the ocean to the atmosphere were low or negative (from the atmosphere to the ocean). During the post frontal condition, the MABL was well developed with a 1200 m height and the latent and sensible heat fluxes from the ocean to the atmosphere were more intense. These observations are fundamental to widen our understanding on the physical processes occurring at the ocean-atmosphere interface and have primary importance for the weather and climate forecast of the south-southwestern region of Brazil.
12
Kim, Seong-Hyeon, and Hansoo Kim. "Long-Term Spatiotemporal Oceanographic Data from the Northeast Pacific Ocean: 1980–2022 Reconstruction Based on the Korea Oceanographic Data Center (KODC) Dataset." Data 8, no. 12 (November 23, 2023): 175. http://dx.doi.org/10.3390/data8120175.
Full textAbstract:
The Korea Oceanographic Data Center (KODC), overseen by the National Institute of Fisheries Science (NIFS), is a pivotal hub for collecting, processing, and disseminating marine science data. By digitizing and subjecting observational data to rigorous quality control, the KODC ensures accurate information in line with international standards. The center actively engages in global partnerships and fosters marine data exchange. A wide array of marine information is provided through the KODC website, including observational metadata, coastal oceanographic data, real-time buoy records, and fishery environmental data. Coastal oceanographic observational data from 207 stations across various sea regions have been collected biannually since 1961. This dataset covers 14 standard water depths; includes essential parameters, such as temperature, salinity, nutrients, and pH; serves as the foundation for news, reports, and analyses by the NIFS; and is widely employed to study seasonal and regional marine variations, with researchers supplementing the limited data for comprehensive insights. The dataset offers information for each water depth at a 1 m interval over 1980–2022, facilitating research across disciplines. Data processing, including interpolation and quality control, is based on MATLAB. These data are classified by region and accessible online; hence, researchers can easily explore spatiotemporal trends in marine environments.
13
Angraeni, Resky Dwi, Naslina Alimina, and Muslim Tadjuddah. "OCEANOGRAPHIC OF THE FISHING GROUND FOR ANOCHVY (Stolephorus spp.) IN THE KOLONO BAY, SOUNTH KONAWE DISTRICT." AQUASAINS 11, no. 2 (April 29, 2023): 1343. http://dx.doi.org/10.23960/aqs.v11i2.p1343-1354.
Full textAbstract:
Kolono Bay is one of the waters in South Konawe Regency which has a large potential for fishery resources with an area of ± 9,400 hectares of water. One of the leading commodities in the waters of Kolono Bay is anchovy (Stolephorus spp). This study aims to determine the characteristics of oceanography, namely the parameters of pH, Salinity, DO (Dissolved Oxygen), current velocity, and depth of anchovy fishing area in the waters of Kolono Bay. This study uses a direct measurement method in the field. Data collection and analysis were carried out from January to March 2019 with ten research stations. The results showed that in January, February, and March in the waters of Kolono Bay, the water temperature ranged from 28.47-31.67°C. The current velocity has a range between 0.092-0.508 m/s. The value of water depth has an average value of 8.0-17 m, the average value of dissolved oxygen ranges from 4.91-7.07 mg/L, salinity with an average value of each station ranging from 32.90-35.63‰ and The degree of acidity of the water (pH) has an average of 8.00. The suggestion from this study is the need for further research on the study of status of anchovy utilization in Kolono Bay so that sustainable and sustainable management can be carried out.
14
Vihma, Timo, Petteri Uotila, Stein Sandven, Dmitry Pozdnyakov, Alexander Makshtas, Alexander Pelyasov, Roberta Pirazzini, et al. "Towards an advanced observation system for the marine Arctic in the framework of the Pan-Eurasian Experiment (PEEX)." Atmospheric Chemistry and Physics 19, no. 3 (February 13, 2019): 1941–70. http://dx.doi.org/10.5194/acp-19-1941-2019.
Full textAbstract:
Abstract. The Arctic marine climate system is changing rapidly, which is seen in the warming of the ocean and atmosphere, decline of sea ice cover, increase in river discharge, acidification of the ocean, and changes in marine ecosystems. Socio-economic activities in the coastal and marine Arctic are simultaneously changing. This calls for the establishment of a marine Arctic component of the Pan-Eurasian Experiment (MA-PEEX). There is a need for more in situ observations on the marine atmosphere, sea ice, and ocean, but increasing the amount of such observations is a pronounced technological and logistical challenge. The SMEAR (Station for Measuring Ecosystem–Atmosphere Relations) concept can be applied in coastal and archipelago stations, but in the Arctic Ocean it will probably be more cost-effective to further develop a strongly distributed marine observation network based on autonomous buoys, moorings, autonomous underwater vehicles (AUVs), and unmanned aerial vehicles (UAVs). These have to be supported by research vessel and aircraft campaigns, as well as various coastal observations, including community-based ones. Major manned drifting stations may occasionally be comparable to terrestrial SMEAR flagship stations. To best utilize the observations, atmosphere–ocean reanalyses need to be further developed. To well integrate MA-PEEX with the existing terrestrial–atmospheric PEEX, focus is needed on the river discharge and associated fluxes, coastal processes, and atmospheric transports in and out of the marine Arctic. More observations and research are also needed on the specific socio-economic challenges and opportunities in the marine and coastal Arctic, and on their interaction with changes in the climate and environmental system. MA-PEEX will promote international collaboration; sustainable marine meteorological, sea ice, and oceanographic observations; advanced data management; and multidisciplinary research on the marine Arctic and its interaction with the Eurasian continent.
15
Añorve-Sanvicente, Laura, Alain Leprêtre, and Dominique Davoult. "Large-Scale Spatial Pattern of the Macrobenthic Diversity in the Eastern English Channel." Journal of the Marine Biological Association of the United Kingdom 76, no. 1 (February 1996): 153–60. http://dx.doi.org/10.1017/s0025315400029088.
Full textAbstract:
A description is provided of the large-scale spatial distribution of the diversity of the benthic macrofauna in the eastern English Channel. Data from the oceanographic cruises of the RCP (Recherche Coopérative sur Programme) Benthos de la Manche Research Programme were obtained during the summers of 1971 to 1975. A total of 707 samples were analysed.Diversity of each sample was measured by means of the species richness (i.e. the total number of species present), the Shannon-Weaver diversity index and Pielou's evenness index. Diversity values were plotted for all 707 oceanographic stations in the area, following a smoothing procedure. Large-scale spatial trends of diversity of the benthic macrofauna were analysed in relation to sediment and species assemblage distribution, but no spatial correlation was found between the two factors. These results indicate that mechanisms affecting large-scale spatial distribution of the diversity are different from those acting on a smaller scale. The role of the hydro-sedimentary processes acting at the geographic scale of the eastern English Channel as presumptive causes of this large-scale pattern of the macrobenthic diversity is discussed.
16
Zodiatis, George, Robin Lardner, Georgios Georgiou, Encho Demirov, Giuseppe Manzella, and Nadia Pinardi. "An Operational European Global Ocean Observing System for the Eastern Mediterranean Levantine Basin: The Cyprus Coastal Ocean Forecasting and Observing System." Marine Technology Society Journal 37, no. 3 (September 1, 2003): 115–23. http://dx.doi.org/10.4031/002533203787537212.
Full textAbstract:
The countries surrounding the Mediterranean Sea have joined together in several multinational initiatives to conduct long-term, integrated, operational oceanographic observations and modelling of this important region. Some of these initiatives and the country members involved are discussed in this paper. Particular emphasis is given to long-term observing systems and modelling conducted in the Eastern Mediterranean Levantine Basin and the region around the island of Cyprus. A complete operational oceanographic forecasting and observing system has been developed in Cyprus, and has been operational since early 2002. The system is called CYCOFOS—Cyprus Coastal Ocean Forecasting and Observing System—and is a component of the Global Ocean Observing System (GOOS), and its European (EuroGOOS) and Mediterranean (MedGOOS) modules. CYCOFOS is the result of several years of research activities all carried out within the framework of European Union-funded projects including: (1) Mediterranean forecasting system, both pilot project and towards environmental predictions (MFSPP and MFSTEP), (2) Mediterranean network to Access and upgrade Monitoring and forecasts Activities in the region (MAMA), (3) European Sea level Service Research Infrastructure (ESEAS-RI), (4) Mediterranean network of Global sea Level Observing System (MedGLOSS), and (5) Marine Environment and Security in the European Areas (MERSEA strand 1). CYCOFOS at present consists of several operational modules, including flow and offshore waves forecasts, satellite remote sensing, coastal monitoring stations and end user-derived applications. All these operational modules provide regular near-real-time information, both to local and sub-regional end users in the Eastern Mediterranean Levantine Basin. This paper discusses these as well as additional ocean observation stations and features soon to be added to CYCOFOS.
17
Linford, Pamela, Iván Pérez-Santos, Paulina Montero, Patricio A. Díaz, Claudia Aracena, Elías Pinilla, Facundo Barrera, et al. "Oceanographic processes driving low-oxygen conditions inside Patagonian fjords." Biogeosciences 21, no. 6 (March 20, 2024): 1433–59. http://dx.doi.org/10.5194/bg-21-1433-2024.
Full textAbstract:
Abstract. The dissolved oxygen (DO) levels of coastal ocean waters have decreased over the last few decades in part because of the increase in surface and subsurface water temperature caused by climate change, the reduction in ocean ventilation, and the increase in stratification and eutrophication. In addition, biological and human activity in coastal zones, bays, and estuaries has contributed to the acceleration of current oxygen loss. The Patagonian fjord and channel system is one world region where low-DO water (LDOW, 30 %–60 % oxygen saturation) and hypoxia conditions (<30 % oxygen saturation, 2 mL L−1 or 89.2 µmol L−1) are observed. An in situ dataset of hydrographic and biogeochemical variables (1507 stations), collected from sporadic oceanographic cruises between 1970 and 2021, was used to evaluate the mechanisms involved in the presence of LDOW and hypoxic conditions in northern Patagonian fjords. Results denoted areas with LDOW and hypoxia coinciding with the accumulation of inorganic nutrients and the presence of salty and oxygen-poor Equatorial Subsurface Water mass. The role of biological activity in oxygen reduction was evident in the dominance of community respiration over gross primary production. This study elucidates the physical and biogeochemical processes contributing to hypoxia and LDOW in the northern Patagonian fjords, highlighting the significance of performing multidisciplinary research and combining observational and modeling work. This approach underscores the importance of a holistic understanding of the subject, encompassing both real-world observations and insights provided by modeling techniques.
18
Rifardi, R. "The Bottom Surface Sediment Transport Changes in Bathymetry in the Rupat Strait, Riau Province, Indonesia." IOP Conference Series: Earth and Environmental Science 934, no. 1 (November 1, 2021): 012054. http://dx.doi.org/10.1088/1755-1315/934/1/012054.
Full textAbstract:
Abstract The Rupat Strait is located at the eastern coast of Sumatera Island, Riau Province,Indonesia, under the influence of the current system flowing from the Malacca Strait into the Strait.The primary purpose of this study is to identify the topographyof Rupat Strait prevailed by bathymetry changes, which was analyzed using oceanographic and satellite images.This study was conducted in the Rupat Strait in July 2018 through two steps of research: 1) oceanographic observation; 2) bathymetry measurement.The study of oceanographic observation was carried out along the coastal areas of Dumai City and Rupat Island. The depth of Rupat Strait (bathymetry) was measured using an echosounder at 60 stations in July 2018. The changes in the depth of the Strait were analyzed by comparing data between depth in 1990 by satellite images and the depth in 2018 by the measurement. The results of study indicate that dominantly, the depth of the Strait has increased by 1.5-2.7 meters for 28 years. The depth of the Rupat Strait, based on the interpretation of the satellite image data of MIKE C-MAP (1990) ranges from 0.9 to 29.4 meters, and of the measurement in 2018, ranging from 2.4 to 32.1 meters.The dominant factor causing the changes are the current system flowing from the Malacca Strait through the Strait during high and low tides, and the surface bottom sediments are transported out the Strait by the current, including the bottom current.
19
Barile, Cynthia, Simon Berrow, and Joanne O’Brien. "Oceanographic Drivers of Cuvier’s (Ziphius cavirostris) and Sowerby’s (Mesoplodon bidens) Beaked Whales Acoustic Occurrence along the Irish Shelf Edge." Journal of Marine Science and Engineering 9, no. 10 (October 2, 2021): 1081. http://dx.doi.org/10.3390/jmse9101081.
Full textAbstract:
Cuvier’s and Sowerby’s beaked whales occur year-round in western Irish waters, yet remain some of the most poorly understood cetaceans in the area. Considering the importance of the area for anthropogenic activities and the sensitivity of beaked whales to noise, understanding their ecology is essential to minimise potential overlaps. To this end, fixed bottom-mounted autonomous acoustic recorders were deployed at 10 stations over four recording periods spanning from May 2015 to November 2016. Acoustic data were collected over 1934 cumulative days, for a total of 7942 h of recordings. To model the probability of presence of Cuvier’s and Sowerby’s beaked whales in the area as a function of oceanographic predictors, we used Generalised Additive Models, fitted with Generalised Estimating Equations to deal with temporal autocorrelation. To reflect prey availability, oceanographic variables acting as proxies of primary productivity and prey aggregation processes such as upwelling events and thermal fronts were selected. Our results demonstrated that oceanographic variables significantly contributed to the occurrence of Cuvier’s and Sowerby’s beaked whales (p-values between <0.001 and <0.05). The species showed similar preferences, with the exception of sdSST. The inclusion of a parameter accounting for the recorders location confirmed the existence of a latitudinal partitioning for those species in the area. This study provides a point of comparison for future research and represents an important step towards a better understanding of those elusive species.
20
Luchin, V. A. "Typical patterns of the water temperature distribution in the upper mixed layer of the Bering Sea in winter season." Izvestiya TINRO 203, no. 4 (December 26, 2023): 944–60. http://dx.doi.org/10.26428/1606-9919-2023-203-944-960.
Full textAbstract:
Typical patterns of the water temperature distribution in the upper mixed layer of the Bering Sea in winter are determined on all available oceanographic data obtainedby research institutions of Russia, Japan, USA, and China. Previously [Luchin, 2023], the data were sorted to two sets presenting «cold» and «warm» winters. The proper set includes 2,492 oceanographic stations and the latter one – 2,130 stations. Spatial distribution of the temperature has some common patterns for both sets: the highest values (3–4 to 5–6 оC) are observed at the central and eastern passages between Aleutian Islands, primarily reflecting the Pacific waters invasion to the sea, then these waters are involved into the large-scale cyclonic gyre over the deep-water basin and transported along the continental slope that is indicated by 3оC isotherm. However, different types of the temperature distribution are well distinguished by prominent difference of its values that is amounted in 1.0–1.5о, up to 3–4о at the northwestern coast including the western part of the eastern Bering Sea slope. A wide set of potential predictors for interannual variability of thermal and dynamic conditions in the Bering Sea are examined using correlation analysis,including the global and regional climatic indices. There is concluded that the winter temperature fields are formed by several key factors, as the warm Pacific waters advection, the basin-scale cyclonic circulation, the vertical and lateral water mixing in the Aleutian sounds and at the continental slope, and fall-winter cooling of the surface layer driven by air–sea heat exchange.
21
Bayhaqi, Ahmad, Mochamad Riza Iskandar, and Dewi Surinati. "Pola Arus Permukaan dan Kondisi Fisika Perairan di Sekitar Pulau Selayar pada Musim Peralihan 1 dan Musim Timur." Oseanologi dan Limnologi di Indonesia 2, no. 1 (May 5, 2017): 83. http://dx.doi.org/10.14203/oldi.2017.v2i1.71.
Full textAbstract:
<strong>Surface Current Pattern and Physics Condition of Waters Around Selayar Island in the First Transitional and Southeast Monsoons. </strong> Seasonal observations of the flow of surface water and physics conditions around Selayar Island adjacent to Arlindo throughflow pathways of Makassar Strait have been conducted with a focus on the first transitional season and the southeast monsoon season. The purpose of this research is to obtain the pattern of seasonal surface current and physics characteristics of water column, i.e. temperature and salinity in Selayar Island waters during those seasons. The observations conducted on 22–27 May 2015 and 7–10 August 2015 illustrated the successive periods of the first transitional season and the southeast monsoon season. The methods used for taking oceanographic data such as temperature, salinity, and current were the stationary oceanographic measurement using CTD and currentmeter at 29 stations located in surrounding waters of Selayar Island. The surface current pattern generated from the interpolation process of the overall observation stations indicated that during the first transitional season the current moved eastward with an average velocity of 0.25 m/s. During the southeast monsoon season, the same pattern was still observed with a slightly higher average velocity of 0.26 m/s. The temperatures and salinity of Selayar Island waters during the southeast monsoon season were 2°C lower and 0.5 psu higher than during the first transitional season. Differences in mean current velocity values tended to be more affected by local tidal conditions. Different salinity was thought to be influenced by upwelling phenomena and local climatic factors such as rainfall, wind, and river flow discharge.
22
Barbosa, S. M., M. J. Fernandes, and M. E. Silva. "Nonlinear sea level trends from European tide gauge records." Annales Geophysicae 22, no. 5 (April 8, 2004): 1465–72. http://dx.doi.org/10.5194/angeo-22-1465-2004.
Full textAbstract:
Abstract. Mean sea level is a variable of considerable interest in meteorological and oceanographic studies, particularly long-term sea level variation and its relation to climate changes. This study concerns the analysis of monthly mean sea level data from tide gauge stations in the Northeast Atlantic with long and continuous records. Much research effort on mean sea level studies has been focused on identifying long-term linear trends, usually estimated through least-squares fitting of a deterministic function. Here, we estimate nonparametric and robust trends using lowess, a robust smoothing procedure based on locally weighted regression. This approach is more flexible than a linear trend to describe the deterministic part of the variation in tide gauge records, which has a complex structure. A common trend pattern of reduced sea levels around 1975 is found in all the analysed records and interpreted as the result of hydrological and atmospheric forcing associated with drought conditions at the tide gauge sites. This feature is overlooked by a linear regression model. Moreover, nonlinear deterministic behaviour in the time series, such as the one identified, introduces a bias in linear trends determined from short and noisy records.Key words. Oceanography: physical (sea level variations); Hydrology (water balance)
23
Cañete, Juan I., Carlos S. Gallardo, Carlos Olave, María S. Romero, Tania Figueroa, and Daniela Haro. "Abundance and spatial distribution of neustonic copepodits of Microsetella rosea (Harpacticoida: Ectinosomatidae) along the western Magellan coast, southern Chile." Latin American Journal of Aquatic Research 44, no. 3 (February 23, 2017): 576–87. http://dx.doi.org/10.3856/vol44-issue3-fulltext-16.
Full textAbstract:
The pelagic harpacticoid copepod Microsetella rosea inhabits the cold waters along the temperate southern coast of Chile, where its population biology and ecological role in the neuston are unknown. During a CIMAR 16 Fiordos cruise realized in the Magellan Region, 26 neustonic samples were collected to analyze the abundance, spatial distribution of copepodits and oceanographic conditions (temperature, salinity, and dissolved oxygen). M. rosea copepodits, the most abundant holoneustonic taxa (30% of total abundance), were present at all sampled stations and were 0.5 times more abundant than calanoids. These copepodits inhabited waters ranging between 6.5-8.5°C and salinity of 26-33, with maximum abundances (1,000-10,000 ind/5 min horizontal drag) at means of 7.2 ± 0.6ºC and salinities of 30.7 ± 0.9. Froward Cape, Almirantazgo Sound, and Inútil Bay stations accounted for 65% of total M. rosea abundance, whereas Beagle Channel stations present the lowest abundances (<4%). The entire sampling area was as an oxygenated estuary (7.4 ± 0.4 mL L-1). Given the abundance and recurrence of M. rosea in the Magellanic neuston, future research should assess the ecological functions of this species. Finally, M. rosea could also be used as a biotracer for processes of aggregation in other estuarine neustonic communities of southern Chile.
24
Han, Guoqi, and Yu Shi. "Development of an Atlantic Canadian Coastal Water Level Neural Network Model." Journal of Atmospheric and Oceanic Technology 25, no. 11 (November 1, 2008): 2117–32. http://dx.doi.org/10.1175/2008jtecho569.1.
Full textAbstract:
Abstract Coastal water-level information is essential for coastal zone management, navigation, and oceanographic research. However, long-term water-level observations are usually only available at a limited number of locations. This study discusses a complementary and simple neural network (NN) approach, to predict water levels at a specified coastal site from the data gathered at other nearby or remote permanent stations. A simple three-layer, feed-forward, back-propagation network and a neural network ensemble, named Atlantic Canadian Coastal Water Level Neural Network (ACCSLENNT) models, was developed to correlate the nonlinear relationship of sea level data among stations by learning from their historical characteristics. Instantaneous hourly observations of water level from five stations along the coast of Atlantic Canada—Argentia, Belledune, Halifax, North Sydney, and St. John’s—are used to formulate and validate the ACCSLENNT models. Qualitative and quantitative comparisons of the network output with target observations showed that despite significant changes in sea level amplitudes and phases in the study area, appropriately trained NN models could provide accurate and robust long-term predictions of both tidal and nontidal (tide subtracted) water levels when only short-term data are available. The robust results indicate that the NN models in conjunction with limited permanent stations are able to supplement long-term historical water-level data along the Atlantic Canadian coast. Because field data collection is usually expensive, the ACCSLENNT models provide a cost-effective alternative to obtain long-term data along Atlantic Canada.
25
Taillandier, Vincent, Thibaut Wagener, Fabrizio D'Ortenzio, Nicolas Mayot, Hervé Legoff, Joséphine Ras, Laurent Coppola, et al. "Hydrography and biogeochemistry dedicated to the Mediterranean BGC-Argo network during a cruise with RV <i>Tethys 2</i> in May 2015." Earth System Science Data 10, no. 1 (March 28, 2018): 627–41. http://dx.doi.org/10.5194/essd-10-627-2018.
Full textAbstract:
Abstract. We report on data from an oceanographic cruise, covering western, central and eastern parts of the Mediterranean Sea, on the French research vessel Tethys 2 in May 2015. This cruise was fully dedicated to the maintenance and the metrological verification of a biogeochemical observing system based on a fleet of BGC-Argo floats. During the cruise, a comprehensive data set of parameters sensed by the autonomous network was collected. The measurements include ocean currents, seawater salinity and temperature, and concentrations of inorganic nutrients, dissolved oxygen and chlorophyll pigments. The analytical protocols and data processing methods are detailed, together with a first assessment of the calibration state for all the sensors deployed during the cruise. Data collected at stations are available at https://doi.org/10.17882/51678 and data collected along the ship track are available at https://doi.org/10.17882/51691.
26
Torres-Martínez, Carlos Mauricio, Erik Coria-Monter, María Adela Monreal-Gómez, Elizabeth Durán-Campos, and David Alberto Salas-de-León. "Vertical distribution patterns of chlorophyll-a during autumn in a coastal environment inside the Gulf of California." Latin American Journal of Aquatic Research 52, no. 1 (February 29, 2024): 187–95. http://dx.doi.org/10.3856/vol52-issue1-fulltext-3091.
Full textAbstract:
An evaluation of the vertical distribution of chlorophyll-a (Chl-a) levels, as an indicator of phytoplankton biomass, has strong repercussions in any marine ecosystem since it allows evaluating its productive potential and the amount of matter that is available for the higher trophic levels of the pelagic food web. This short communication aims to report the vertical distribution patterns of Chl-a levels and some selected hydrographic parameters during autumn in the Bay of La Paz, the biggest and deepest coastal environment inside the Gulf of California, a site also recognized for its high biodiversity. Two oceanographic research cruises were carried out during November 2014 and 2016. A CTD probe configured with dissolved oxygen and active fluorescence sensors, all pre-calibrated by the manufacturer, was used to acquire high-resolution data along the water column. The results showed two distribution patterns of Chl-a: 1) deep peaks (>60 m depth, with concentrations >6 mg m-3) associated with the bottom at nearshore stations, and 2) maximum concentration peaks associated with the thermocline/pycnocline with concentrations up to 7.40 mg m-3 observed at deep stations. A multivariate statistical analysis confirmed the role played by some physical variables in the distribution patterns described. The results shown in this study complement the previous research and fill in the existing gaps for the transition periods between the warm and the cold.
27
Clauss, G. F., S. Hoog, M. Vannahme, H. Gerber, F. Gasparoni, and D. Calore. "MODUS: Space Shuttle for Deep-Water Operations." Marine Technology and SNAME News 40, no. 03 (July 1, 2003): 218–28. http://dx.doi.org/10.5957/mt1.2003.40.3.218.
Full textAbstract:
This paper presents MObile Docker for Underwater Sciences (MODUS), a specialized remotely operated vehicle (ROV) for deployment, recovery, and servicing of heavy sea bottom stations, for example, scientific observatories for deep-water application (depth rated 4,000 m). Developed, built, and tested as part of the EC-funded project GEophysical and Oceanographic STation for Abyssal Research (GEOSTAR 2001), the new ROV system includes the operating vessel with winch and umbilical and the versatile "space shuttle" MODUS for handling the bottom station with modularized payload. The paper focuses on aspects of the development as well as open water trials and missions. Results from hydrodynamic analyses are presented to illustrate design studies for minimized structure drag and therefore minimized power requirements for thruster-driven horizontal movements. Motion analyses comprise the dynamic behavior of the ship and the entire deep-dived system considering hydroelastic effects. Due to the direct coupling, vertical excitations of the ship in the prevailing sea are substantially transmitted along the submerged umbilical to the ROV, causing potentially harmful slack cable situations. Results from numerical simulations illustrate the dynamic response of the system due to ship oscillations in random seas and the associated downtime of MODUS operations. The paper presents the latest technological and scientific applications of MODUS during its first cruises: Reaching depths of 3,700 m within the EC-funded projects GEOSTAR and BIOtechnology from the DEEP (BIODEEP) in the Mediterranean Sea demonstrates its high availability with reliable performance and low costs.
28
Garbossa, Luis Hamilton Pospissil, Matias Guilherme Boll, Argeu Vanz, and Camila Kuminek De Amorim. "Comparison of two data acquisition protocols for tide gauge sensors at Imbituba port – Santa Catarina State." Agropecuária Catarinense 34, no. 3 (December 28, 2021): 63–66. http://dx.doi.org/10.52945/rac.v34i3.679.
Full textAbstract:
The Santa Catarina Tide Gauge Network (SCTGN) is a continuous sea level monitoring system to support fishery, aquaculture, and navigation in general. Deployed in the state of Santa Catarina, Brazil, the initiative started in 2012 with one tide gauge at the Santa Catarina Island South Bay to support aquaculture research projects and hydrodynamic numerical modelling. By 2020, the SCTGN was fully operational, consisting of 11 tide gauge stations along the 450km of the Santa Catarina coastal line. The next step is standardizing these tide stations to international data collection protocols. Knowledge of the effects different programming protocols have on data collection are important since they may affect the results. Data from a radar gauge (RG) and a vented (or relative) pressure gauge (VPG) were obtained over six months. The difference between RG and VPG measurements showed a 5.07cm2 variance. Percentage of reading errors was 0.03% and 0.77% for RG and VPG, respectively. This study aims to evaluate the feasibility of the SCTGN data collection protocol in the RG to comply with the Intergovernmental Oceanographic Commission (IOC) recommendations for sea level monitoring. We find that an RG gauge using the SCTGN protocol is adequate to monitor sea levels and has an easier installation and maintenance, and more stable vertical datum control.
29
Ilcev, Dimov Stojce. "Introduction to Coastal HF Maritime Surveillance Radars." Polish Maritime Research 26, no. 3 (September 1, 2019): 153–62. http://dx.doi.org/10.2478/pomr-2019-0056.
Full textAbstract:
Abstract This paper presents the main technical characteristics and working performances of coastal maritime surveillance radars, such as low-power High-Frequency Surface Wave Radars (HFSWR) and Over the Horizon Radars (OTHR). These radars have demonstrated to be a cost-effective long-range early-warning sensor for ship detection and tracking in coastal waters, sea channels and passages. In this work, multi-target tracking and data fusion techniques are applied to live-recorded data from a network of oceanographic HFSWR stations installed in Jindalee Operational Radar Network (JORN), Wellen Radar (WERA) in Ligurian Sea (Mediterranean Sea), CODAR Ocean Sebsorsin and in the German Bight (North Sea). The coastal Imaging Sciences Research (ISR) HFSWR system, Multi-static ISR HF Radar, Ship Classification using Multi-Frequency HF Radar, Coastal HF radar surveillance of pirate boats and Different projects of coastal HF radars for vessels detecting are described. Ship reports from the Automatic Identification System (AIS), recorded from both coastal and satellite Land Earth Stations (LES) are exploited as ground truth information and a methodology is applied to classify the fused tracks and to estimate system performances. Experimental results for all above solutions are presented and discussed, together with an outline for future integration and infrastructures.
30
Wyrtki, Klaus. "THE SUBTROPICAL LOWER WATER BETWEEN THE PHILIPPINES AND IRIAN (NEW GUINEA)." Marine Research in Indonesia 1 (December 15, 2008): 20–52. http://dx.doi.org/10.14203/mri.v1i0.323.
Full textAbstract:
Oceanographic observations are published, taken by the research vessel Siboela in 1949 at 57 stations in the Celebes Sea and around Halmahera. Basing on these observations, an analysis is made of the Subtropical Lower Water (salinity-Maximum) in this region and is compared with the observations of the Snellius and the Dana in 1929. The distribution of the oxygen content allows a distinction of the Lower Water into a northern and a southern water type, which regions of origion are situated in 23°N between 165°E and 165°W and in 15°S between 120° and 150°W respectively. It is shown that the temperature of the salinity maximum in 1949 is 1.4° higher and the salinity 0.11‰ lower than in 1929. The topography of the salinity maximum, which lies in about 100 to 200 m, is closely correlated with the surface currents.
31
Harikumar, R., T. M. Balakrishnan Nair, G. S. Bhat, Shailesh Nayak, Venkat Shesu Reddem, and S. S. C. Shenoi. "Ship-Mounted Real-Time Surface Observational System on board Indian Vessels for Validation and Refinement of Model Forcing Fields*." Journal of Atmospheric and Oceanic Technology 30, no. 3 (March 1, 2013): 626–37. http://dx.doi.org/10.1175/jtech-d-11-00212.1.
Full textAbstract:
Abstract A network of ship-mounted real-time Automatic Weather Stations integrated with Indian geosynchronous satellites [Indian National Satellites (INSATs)] 3A and 3C, named Indian National Centre for Ocean Information Services Real-Time Automatic Weather Stations (I-RAWS), is established. The purpose of I-RAWS is to measure the surface meteorological–ocean parameters and transmit the data in real time in order to validate and refine the forcing parameters (obtained from different meteorological agencies) of the Indian Ocean Forecasting System (INDOFOS). Preliminary validation and intercomparison of analyzed products obtained from the National Centre for Medium Range Weather Forecasting and the European Centre for Medium-Range Weather Forecasts using the data collected from I-RAWS were carried out. This I-RAWS was mounted on board oceanographic research vessel Sagar Nidhi during a cruise across three oceanic regimes, namely, the tropical Indian Ocean, the extratropical Indian Ocean, and the Southern Ocean. The results obtained from such a validation and intercomparison, and its implications with special reference to the usage of atmospheric model data for forcing ocean model, are discussed in detail. It is noticed that the performance of analysis products from both atmospheric models is similar and good; however, European Centre for Medium-Range Weather Forecasts air temperature over the extratropical Indian Ocean and wind speed in the Southern Ocean are marginally better.
32
Taufik, M., Y. H. Restiangsih, A. Ma’mun, T. Hidayat, K. Wagiyo, A. S. Panggabean, Nurulludin, and Prihatiningsih. "Ichthyoplankton Biodiversity in the Indonesian Fisheries Management Area-573 in 2015." IOP Conference Series: Earth and Environmental Science 1350, no. 1 (June 1, 2024): 012018. http://dx.doi.org/10.1088/1755-1315/1350/1/012018.
Full textAbstract:
Abstract Studying ichthyoplankton is crucial for understanding the impact of fish larvae mortality on the recruitment of adult fish and fishing resources. Fish larvae samples were collected in the southern waters of Java using the Baruna Jaya IV research vessel in September - October 2015. Fish larvae were collected using bongo-net and oceanographic data were collected using Conductivity Temperature Depth (CTD) are Temperature and salinity and chlorophyll-a using Aqua MODIS satellite L3 at 36 stations. The results showed the range of fish larvae abundance was 0 - 2,074 ind/1000 m3 with an average of 174 ind/1000 m3. The fish eggs were found with an abundance of 0 - 1,601 eggs/1000 m3. and an average of 213 eggs/1000 m3. The composition of fish larvae recorded 22 families, there were 5 dominant families namely Scombridae (28.60%), Bregmacerotidae (22.96%), Carangidae (7.93%), Blennidae (7.52%), and Gobiidae (7.52%). The diversity of fish larvae was most prevalent at station 28 (SST 26.7 0C; SSS 34.4 PSU; and CHL-a 0.43 mg/m3) and station 36 (SST 27.4 0C; SSS 34.4 PSU) each found 9 families. The abundance of fish larvae was mostly found at stasion 11 had SST 23.50 0C; SSS 34.56 PSU; and CHL-a 0.33 mg/m3 with the dominance of the family Bregmacerotidae. Scombridae was mostly found at stasion 22 with sea surface temperature (SST) 26.52 0C; sea surface salinity (SSS) 34.28 PSU; and sea surface chlorophyll-a (CHL-a) 0.41 mg/m3 which is in the southern waters of Lombok.
33
Félix, Francisco Javier, Arturo Garrido Mora, Yessenia Sánchez Alcudia, Alberto de Jesús Sánchez Martínez, Andrés Arturo Granados Berber, and José Luis Ramos Palma. "Distribución y abundancia espacial y temporal de Stomolophus meleagris (Rhizostomae: Stomolophidae) en un sistema lagunar del sur del Golfo de México." Revista de Biología Tropical 65, no. 1 (March 8, 2017): 167. http://dx.doi.org/10.15517/rbt.v65i1.23727.
Full textAbstract:
The scyphomedusae feed mainly on microscopic crustaceans, eggs and fish larvae, molluscs and some other jellyfishes. The distribution and abundance of the scyphomedusae has an economic and ecological impact as they are predators that have an influence on the population dynamics of other fisheries. This investigation took place in the lagoon system ‘Arrastradero-Redonda’, Tabasco, from September 2013 to August 2014, with the purpose to provide information on the distribution, and spatial and temporal abundance of Stomolophus meleagris; along with its relation to environmental parameters. A total of 10 stations were defined and biological samples were taken on a monthly basis during this annual cycle. For this purpose, three pulls with a beach seine monofilament (20m long by 3m height, mesh opening 1.5 cm, 5 to 10 minutes) per station were made within a 1 km2 area. Information obtained was used to calculate the fishing efficiency analysis (CPUE con org./Evaluated Area Unit) and to determine the relationship with the environmental parameters. Our results showed that the abundance in the stations 1 to 3 was from 7 to 19 org./km2 from April to August 2014; less organisms were observed in stations 6 to 10 (an average of 1 org./km2) from October 2013 to March 2014. The multiple correlation steps analysis indicated that there is a strong association between the CPUE and some environmental investigated variables, and a 70.9 % variability of the data was observed. The salinity resulted the most important variable because it determined a 64.3 % of variation; it was followed by the temperature with a 3.6 %; meanwhile, dissolved oxygen explained only the 2.9 %, this was mainly because within the area there are several geological, oceanographic and biological factors that favor the distribution of this species due to seawater contribution through the Tupilco bar. With the provided data with this investigation we were able to determine the fishery potential of this resource for Tabasco state. However, additional research is required to allow an extended quantification of this resource, to determine the commercial exploitation areas, and drive studies about reproductive and feeding habits, that may provide the necessary information to establish plans for sustainable use.
34
Acri, Francesco, Mauro Bastianini, Fabrizio Bernardi Aubry, Elisa Camatti, Alfredo Boldrin, Caterina Bergami, Daniele Cassin, et al. "A long-term (1965–2015) ecological marine database from the LTER-Italy Northern Adriatic Sea site: plankton and oceanographic observations." Earth System Science Data 12, no. 1 (February 4, 2020): 215–30. http://dx.doi.org/10.5194/essd-12-215-2020.
Full textAbstract:
Abstract. In this paper we describe a 50-year (1965–2015) ecological database containing data collected in the northern Adriatic Sea (NAS) at one of the 25 research parent sites belonging to the Italian Long Term Ecological Research Network (LTER-Italy, http://www.lteritalia.it, last access: February 2020). LTER-Italy is a formal member of the International (https://www.ilter.network, last access: February 2020) and European (http://www.lter-europe.net/, last access: February 2020) LTER networks. The NAS is undergoing a process, led by different research institutions and projects, of establishing a marine ecological observatory, building on the existing facilities, infrastructure, and long-term ecological data. During this process, the implementation of open-access and open-science principles has been started by creating an open-research life cycle that involves sharing ideas and results (scientific papers), data (raw and processed), metadata, methods, and software. The present data paper is framed within this wider context. The database is composed of observations on abiotic parameters and phytoplankton and zooplankton abundances, collected during 299 cruises in different sampling stations, in the Gulf of Venice in particular. Here we describe the sampling and analytical activities, the parameters, and the structure of the database. The database is available at https://doi.org/10.5281/zenodo.3516717 (Acri et al., 2019), and it was also uploaded in the DEIMS-SDR repository (Dynamic Ecological Information Management System – Site and Dataset Registry, https://deims.org/), which is the official site and data registry for the International LTER network.
35
Bologa, Alexandru Ș. "The Black Sea in Romanian Oceanographic Research." Annals of the Academy of Romanian Scientists Series on History and Archaeology 13, no. 2 (2021): 73–107. http://dx.doi.org/10.56082/annalsarscihist.2021.2.73.
Full textAbstract:
Romania, as a maritime state, after being separated from the Black Sea coast for 400 years, until the War of Independence in 1877, has a tradition in the marine sciences for over 100 years. The illustrious ancestors of Romanian oceanography, especially biological oceanography, are Emil Racoviță, Grigore Antipa and Ioan Borcea. From an oceanographic point of view, E. Racovitza distinguished himself as a biologist of the famous Antarctic multinational expedition, under the command of Captain Adrien de Gerlache, from Belgium, aboard the vessel Belgica, between 1997 and 1998. G. Antipa is the founder of the Bio-Oceanographic Institute in Constanța (1932) and of the Biological Research Station in Caliacra (currently in Bugaria) and in this context he held the positions of organizer, general administrator and director general of the State Fisheries, as the second national delegate of Romania at the International Commission for the Scientific Exploration of the Mediterranean Sea (CIESM), and as rapporteur for the Black Sea, Marmara and the Eastern Mediterranean, as well as organizer of the first Congress and General Assembly of CIESM in Romania in Bucharest in 1935. I. Borcea's main scientific achievement is the creation of the Marine Zoological Station in Agigea, in 1926, which bears his name to this day, with the maintenance of close collaborative relations in the field of marine biology, especially with France and Italy. The main marine research institutions, namely the Marine Zoological Station “Professor Ioan Borcea”, the Bio-Oceanographic Institute, which later became the Fisheries Research Station “Dr. Grigore Antipa”, the Marine Biology Sector from Constanța of the “Traian Săvulescu” Institute of Biology from Bucharest, the Oceanographic Research Station from Constanța and Sulina and the Marine Sedimentology Laboratory, affiliated to the Geological Institute of Romania, merged into the Romanian Marine Research Institute (RMRI) from Constanța on March 1, 1970. The succesor of RMRI since 1990 is the National Institute for Marine Research and Development “Grigore Antipa”, in the same headquarters (Bd. Mamaia No. 300, RO-900581 Constanța). A definite confirmation of the value of the results of the Romanian marine research, over time, is, among others, the close professional relationships with CIESM, continued to the present. Thus, Romania has further promoted and supports marine research at national, regional and international level.
36
Andreeva, N. A. "Monitoring of the cyanobacteria composition in bottom sediments of the water area of the Black and Azov seas along the coast of Crimea." Monitoring systems of environment, no. 1 (March 25, 2021): 107–17. http://dx.doi.org/10.33075/2220-5861-2021-1-107-117.
Full textAbstract:
As a result of laboratory cultivation of bottom sediment samples taken during six expeditions at oceanographic stations of the coastal waters of the Black and Azov Seas located along the coast of Crimea in different seasons of 2019‒2020, preliminary results on the distribution of cyanobacteria in the benthos of these areas were obtained. The development of cultivated forms of cyanobacteria was observed in 65 Black Sea samples at 54 stations and in all samples from the Sea of Azov. In the benthos of the Black and Azov Seas areas, representatives of 11 and 10 genera of cyanobacteria were identified, respectively, belonging to four orders: Synechococcales (Synechococcus, Rhabdoderma, Aphanocapsa, Merismopedia, Leptolyngbya), Chroococcales (Microcystis, Chroococcus), Oscillatoriales (including Spirulina), Nostocales (Anabaena, Nostoc, Scytonema). Representatives of the genus Microcystis were the most common in the bottom sediments of the Black Sea coast of Crimea, whereas in the Sea of Azov they were Microcystis and Oscillatoriales. Cyanobacteria with a deep violet color were often found, which indicates the predominance of phycoerythrin in the pigment complex of these cyanobacteria. The maximum number of cultivated forms of cyanobacteria in the bottom sediments of the Black Sea during the entire study period was registered in the euphotic zone, and the lowest – in the 100–1000 m zone. 40 batch cultures were obtained, from which new strains of cyanobacteria are be isolated. In the future, the research results can be used to monitor the ecological state of the coastal waters, while the isolated cyanobacteria strains can also be used for genetic, biotechnological, medical and other research.
37
Azzura, Muhammad Raihan Faqiha Bintang, Ita Riniatsih, and Gunawan Widi Santosa. "Kajian Kondisi Padang Lamun di Pulau Kelapa Dua Taman Nasional Kepulauan Seribu." Journal of Marine Research 11, no. 4 (September 2, 2022): 720–28. http://dx.doi.org/10.14710/jmr.v11i4.33929.
Full textAbstract:
Ekosistem lamun menjadi sumber kehidupan bagi biota laut yang berasosiasi didalamnya. Penelitian ini bertujuan untuk mengetahui kondisi ekosistem padang lamun yang terdapat di Pulau Kelapa Dua, Taman Nasional Kepulauan Seribu. Stasiun pengamatan terbagi mejadi tiga stasiun, dan metode survey yang digunakan untuk pengambilan data lamun dengan menggunakan metoda line transek kuadran. Hasil penelitian ditemukan 4 jenis lamun yang tersebar pada tiga stasiun penelitian, yaitu; Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, dan Syiringodium isoetifolium. Presentase total penutupan lamun berkisar antara 10,23-35,61%. Kerapatan lamun berkisar antara 223,63-366,75 ind/m2 dengan komposisi dan kerapatan jenis tertinggi adalah jenisThalassia hemprichii dan terendah Cymodocea rotundata. Substrat yang ditemukan pada ketiga Stasiun adalah substrat pasir dan pecahan karang (rubble). Indeks ekologi lamun Stasiun 1 memiliki keanekaragaman lamun sedang, keseragaman sedang, dan ada yang medominasi. Stasiun 2 memiliki keanekaragaman yang rendah, keseragaman rendah, dan mendominansi. Stasiun 3 memiliki keanekaragaman sedang, kesergaman tinggi, dan tidak ada dominasi. Hasil perhitungan Indeks ekologi menunjukkan bahwa kondisi perairan padang lamun di Pulau Kelapa Dua Kepulauan, Seribu masih dalam kondisi stabil. Berdasarkan kriteria kondisi status ekosistem padang lamun Peraturan Pemerintah Republik Indonesia Nomor 22 Tahun 2021 status ekosistem padang lamun di Pulau Kelapa Dua dikategorikan Miskin (<29,9%), yaitu berkisar 26,77%. Secara keseluruhan parameter hidro-oseanografi perairan pada ekosistem lamun dan kondisi ekologinya masih dapat mendukung pertumbuhan lamun. Seagrass ecosystems are a source of life for marine biota associated therein. This study aims to determine the condition of the seagrass ecosystem in Kelapa Dua Island, Taman Nasional Kepulauan Seribu. The observation station is divided into three stations, and the survey method used for seagrass data collection is using the quadrant line transect method. The results of the study found 4 types of seagrasses spread over three research stations, namely; Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, and Syringodium isoetifolium. The percentage of total seagrass cover ranged from 10.23-35.61%. Seagrass density ranged from 223.63-366.75 ind/m2 with the highest species composition and density being Thalassia hemprichii and the lowest being Cymodocea rotundata. The substrate found at the three stations is a substrate of sand and rubble. Seagrass ecology index Station 1 has moderate seagrass diversity, moderate uniformity, and some are dominant. Station 2 has low diversity, low uniformity, and dominance. Station 3 has moderate diversity, high uniformity, and none dominates. The results of the calculation of the ecological index show that the condition of the seagrass meadows on Kelapa Dua Island in the Thousand Islands is still in a stable condition. Based on the criteria for the condition of the seagrass ecosystem status, Government Regulation of the Republic of Indonesia Number 22 of 2021, the status of the seagrass ecosystem on Kelapa Dua Island is categorized as poor (<29.9%), which is around 26.77%. Overall hydro-oceanographic parameters of seagrass ecosystems and their ecological conditions can still support seagrass growth.
38
Noureddine, A., M. Benkrid, R. Maoui, M. Menacer, and R. Boudjenoun. "Distribution of Natural Radioactivity,137Cs,90Sr, and Plutonium Isotopes in a Water Column and Sediment Core along the Algerian Coast." Science and Technology of Nuclear Installations 2007 (2007): 1–6. http://dx.doi.org/10.1155/2007/48598.
Full textAbstract:
Concentrations of natural (40K,210Pb, uranium, and thorium series) and artificial radioelements (137Cs,90Sr,239+240Pu) were determined in seawater and sediment samples collected from stations along the Algerian coast. Seawater was collected from the surface to a maximum depth of 2000 m; the sediment cores were sampled from a depth of around 1500 m. This work was carried out in August 2001, in the framework of the Regional African project /7/004 (RAF), by the accomplishment of an oceanographic campaign organized by the International Atomic Energy Agency (IAEA) in collaboration with Commissariat à l'Energie Atomique (COMENA) and L'Institut des Sciences de la Mer et de L'Amenagement du Littoral (ISMAL), on board of the research vessel of M.S. Benyahia of ISMAL. In addition to the record of the conductivity (mS) and temperature (°C) data at each station, seawater samples were treated and preconcentrated on board, those of sediment cores were divided into different layers in order to undergo analyses in the laboratory of radiological impact studies of Algiers. Concentration results were obtained for137Cs and90Sr in mBq/L and239+240Pu inμBq/L in seawater, and also for natural and artificial radionuclides in Bq/kg dry weight in the layers of the sediment cores. The different profiles of137Cs,239+240Pu,90Sr, and210Pb concentrations against depth were presented to show artificial radioactivity distribution in the water column and sediment core. Concentrations of137Cs in the sediment core were also used to identify the137Cs peak in the area of interest.
39
Marchenko, Aleksey. "Modeling of Thermodynamic Consolidation of Sea Ice Ridges Drifting in the Water with Changing Temperature." Journal of Marine Science and Engineering 10, no. 12 (December 2, 2022): 1858. http://dx.doi.org/10.3390/jmse10121858.
Full textAbstract:
Oceanographic and ice conditions in the region of Spitsbergen Bank in the Barents Sea were investigated in research cruises of the “Polarsyssel” in 2017–2019. Trajectories of ice drift were constructed using GPS data of the buoys deployed on the floes in the research cruises. The duration of the ice season in the region was analyzed using ice charts. The air temperature and wind velocities were analyzed using the data of meteorological stations on Bear Island and Hopen Island. Fieldwork on drifting ice showed the existence of thick consolidated floes with drafts up to 8 m, which were identified as completely consolidated sea ice ridges. The presence of such floes is dangerous for winter navigation along Spitsbergen Bank. A model of thermodynamic consolidation of ice ridges was formulated to investigate the thermodynamic evolution of ice ridges. The observed air and sea water temperatures were used in the boundary conditions on top and bottom surfaces of sea ice rubble. It was shown that the regular interaction of sea ice rubble with Atlantic and Arctic waters in the region of Spitsbergen Bank leads to almost complete consolidation of the ice rubble with an initial macro-porosity 0.2 for 150 days.
40
Campos, Bernardita, and Mauricio F. Landaeta. "Distribution and abundance of planktonic mollusks along a longitudinal gradient in the Southeastern Pacific off Chile." Revista de Biología Marina y Oceanografía 56, no. 2 (December 31, 2021): 122–33. http://dx.doi.org/10.22370/rbmo.2021.56.2.3056.
Full textAbstract:
The objectives of this research were to estimate the abundance of the main groups of planktonic mollusks (meroplanktonic larvae, holoplanktonic gastropods and cephalopod paralarvae), and relate these groups to the physical-chemical water properties along a longitudinal gradient between Caldera, on the coast of mainland Chile, and the Easter Island ecoregion (Rapa Nui Island and Salas y Gómez Island), in the Southeast Pacific Ocean. Plankton samples were collected over the course of the CIMAR 21-Islas Cruise, from October to November 2015, at 33 oceanographic stations via vertical hauls of a WP2 net (180-µm mesh size) from a maximum depth of 300 m to the sea surface. Mollusks were sorted, counted and initially assigned to Class rank, later being identified to lower taxonomic ranks. Planktonic mollusks were obtained at all stations, and were composed of 92.7% of Gastropoda and 7.3% of Bivalvia. The total abundance of mollusks varied between 55 and 4,922 individuals 100 m-3.Euthecosomate gastropods exhibited the highest occurrence within the oceanic area. Meanwhile, no paralarvae were captured. Differences in the composition of planktonic mollusks between the continental and oceanic zones were evident. Bivalve larvae increased their abundance in warmer, salty and vertically mixed waters. These results are the first record of meroplanktonic mollusks in waters near the Chilean oceanic islands, and suggest that planktonic mollusks display spatial variation at the scale of the South Pacific Basin, which could be related to the hydrographic conditions and the water column structure.
41
Pamungkas, A., A. F. Syarif, and J. D. N. Manik. "Management blueprint of coastal and marine: concepts of mariculture around sea tin mining activities (case study: Matras Waters, Bangka Belitung Province)." IOP Conference Series: Earth and Environmental Science 1108, no. 1 (November 1, 2022): 012057. http://dx.doi.org/10.1088/1755-1315/1108/1/012057.
Full textAbstract:
Abstract Bangka Belitung as an archipelagic province has abundant marine natural resources, including tin reserves and mariculture potential, one of which is Matras waters, Bangka Regency. The exploitation of tin mining in coastal areas will have an impact especially decrease the fish abudance at sea. Therefore, this research was carried out to producing the management blueprint of these two activities in the term of sustainability. The methodologies used in this research are analysis of hydro-oceanographic characteristics, sea water quality conditions and the suitability of mariculture on April 2022. Based on the field data, the quality of sea water in Matras waters can be classified as still quite good where only TSS has a value below the sea water quality standard. However, if we look at the aspect of aquaculture suitability, Matras waters still have the potency for mariculture especially at stations 1 and 2 with suitability scores reaching 76 and 78 which are classified as moderately suitable. In addition, if we look at the legal-socio-economy aspect, clear regulations are needed from the government, both central and regional in managing marine utilization areas such as tightening the implementation of the Approval for the Conformity of Marine Spatial Utilization Activities (PKKPRL).
42
Roarty, Hugh, Scott Glenn, Josh Kohut, Donglai Gong, Ethan Handel, Erick Rivera, Teresa Garner, et al. "Operation and Application of a Regional High-Frequency Radar Network in the Mid-Atlantic Bight." Marine Technology Society Journal 44, no. 6 (November 1, 2010): 133–45. http://dx.doi.org/10.4031/mtsj.44.6.5.
Full textAbstract:
AbstractThe Mid-Atlantic Regional Coastal Ocean Observing System (MARCOOS) High-Frequency Radar Network, which comprises 13 long-range sites, 2 medium-range sites, and 12 standard-range sites, is operated as part of the Integrated Ocean Observing System. This regional implementation of the network has been operational for 2 years and has matured to the point where the radars provide consistent coverage from Cape Cod to Cape Hatteras. A concerted effort was made in the MARCOOS project to increase the resiliency of the radar stations from the elements, power issues, and other issues that can disable the hardware of the system. The quality control and assurance activities in the Mid-Atlantic Bight have been guided by the needs of the Coast Guard Search and Rescue Office. As of May 4, 2009, these quality-controlled MARCOOS High-Frequency Radar totals are being served through the Coast Guard’s Environmental Data Server to the Coast Guard Search and Rescue Optimal Planning System. In addition to the service to U.S. Coast Guard Search and Rescue Operations, these data support water quality, physical oceanographic, and fisheries research throughout the Mid-Atlantic Bight.
43
Hainbucher, D., V. Cardin, G. Siena, U. Hübner, M. Moritz, U. Drübbisch, and F. Basan. "Hydrography in the Mediterranean Sea during a cruise with RV <i>Poseidon</i> in April 2014." Earth System Science Data 7, no. 2 (September 3, 2015): 231–37. http://dx.doi.org/10.5194/essd-7-231-2015.
Full textAbstract:
Abstract. We report on data from an oceanographic cruise in the Mediterranean Sea on the German research vessel Poseidon in April 2014. Data were taken on a west–east section, starting at the Strait of Gibraltar and ending south-east of Crete, as well on sections in the Ionian and Adriatic Sea. The objectives of the cruise were threefold: to contribute to the investigation of the spatial evolution of the Levantine Intermediate Water (LIW) properties and of the deep water masses in the eastern Mediterranean Sea, and to investigate the mesoscale variability of the upper water column. The measurements include salinity, temperature, oxygen and currents and were conducted with a conductivity, temperature and depth(CTD)/rosette system, an underway CTD and an acoustic Doppler current profiler (ADCP). The sections are on tracks which have been sampled during several other cruises, thus supporting the opportunity to investigate the long-term temporal development of the different variables. The use of an underway CTD made it possible to conduct measurements of temperature and salinity with a high horizontal spacing of 6 nm between stations and a vertical spacing of 1 dbar for the upper 800 m of the water column.
44
Fedotova, A. A., and S. V. Kashin. "THE STRUCTURE OF WATER MASSES IN THE DAVIS AND MAWSON SEAS ACCORDING TO EXPEDITION DATA OF THE 67th RAE." Journal of Oceanological Research 51, no. 2 (July 19, 2023): 21–47. http://dx.doi.org/10.29006/1564-2291.jor-2023.51(2).3.
Full textAbstract:
We present the results of oceanographic studies from 64 stations occupied on the slope and shelf in the Davis Sea and the Mawson Sea during the 67th Russian Antarctic Expedition (RAE) from the R/V “Akademik Fedorov” in January–February 2022. The analysis of unique highprecision CTD data and hydrochemical indicators, together with a comparison with the results of previous studies, allowed us to obtain valuable information about the interannual variability of thermohaline characteristics of Antarctic shelf water on the shelf in the central part of the Davis Sea, to determine the structure of water masses on the slope and shelf in the western part of the Davis Sea and the eastern part of the Mawson Sea. Cascading and dense Antarctic shelf water not been recorded during the research. The thermohaline characteristics of Antarctic shelf water recorded in the central part of the Davis Sea in 2001, 2017, 2021 and dense Antarctic shelf water presence in the basins in February 2022 suggest the participation of Davis Sea shelf water in the ventilation of deep waters and suggest an irregular nature of the source of Antarctic bottom waters in the Davis Sea.
45
Morris, David J., John K. Pinnegar, David L. Maxwell, Stephen R. Dye, Liam J. Fernand, Stephen Flatman, Oliver J. Williams, and Stuart I. Rogers. "Over 10 million seawater temperature records for the United Kingdom Continental Shelf between 1880 and 2014 from 17 Cefas (United Kingdom government) marine data systems." Earth System Science Data 10, no. 1 (January 9, 2018): 27–51. http://dx.doi.org/10.5194/essd-10-27-2018.
Full textAbstract:
Abstract. The datasets described here bring together quality-controlled seawater temperature measurements from over 130 years of departmental government-funded marine science investigations in the UK (United Kingdom). Since before the foundation of a Marine Biological Association fisheries laboratory in 1902 and through subsequent evolutions as the Directorate of Fisheries Research and the current Centre for Environment Fisheries & Aquaculture Science, UK government marine scientists and observers have been collecting seawater temperature data as part of oceanographic, chemical, biological, radiological, and other policy-driven research and observation programmes in UK waters. These datasets start with a few tens of records per year, rise to hundreds from the early 1900s, thousands by 1959, and hundreds of thousands by the 1980s, peaking with > 1 million for some years from 2000 onwards. The data source systems vary from time series at coastal monitoring stations or offshore platforms (buoys), through repeated research cruises or opportunistic sampling from ferry routes, to temperature extracts from CTD (conductivity, temperature, depth) profiles, oceanographic, fishery and plankton tows, and data collected from recreational scuba divers or electronic devices attached to marine animals. The datasets described have not been included in previous seawater temperature collation exercises (e.g. International Comprehensive Ocean–Atmosphere Data Set, Met Office Hadley Centre sea surface temperature data set, the centennial in situ observation-based estimates of sea surface temperatures), although some summary data reside in the British Oceanographic Data Centre (BODC) archive, the Marine Environment Monitoring and Assessment National (MERMAN) database and the International Council for the Exploration of the Sea (ICES) data centre. We envisage the data primarily providing a biologically and ecosystem-relevant context for regional assessments of changing hydrological conditions around the British Isles, although cross-matching with satellite-derived data for surface temperatures at specific times and in specific areas is another area in which the data could be of value (see e.g. Smit et al., 2013). Maps are provided indicating geographical coverage, which is generally within and around the UK Continental Shelf area, but occasionally extends north from Labrador and Greenland to east of Svalbard and southward to the Bay of Biscay. Example potential uses of the data are described using plots of data in four selected groups of four ICES rectangles covering areas of particular fisheries interest. The full dataset enables extensive data synthesis, for example in the southern North Sea where issues of spatial and numerical bias from a data source are explored. The full dataset also facilitates the construction of long-term temperature time series and an examination of changes in the phenology (seasonal timing) of ecosystem processes. This is done for a wide geographic area with an exploration of the limitations of data coverage over long periods. Throughout, we highlight and explore potential issues around the simple combination of data from the diverse and disparate sources collated here. The datasets are available on the Cefas Data Hub (https://www.cefas.co.uk/cefas-data-hub/). The referenced data sources are listed in Sect. 5.
46
Hedgecock, I. M., C. N. Gencarelli, G. J. Sch{ü}rmann, F. Sprovieri, and N. Pirrone. "Measurements and modelling of ozone in the Mediterranean MBL: an investigation of the importance of ship emissions to local ozone production." Atmospheric Chemistry and Physics Discussions 12, no. 7 (July 5, 2012): 16557–602. http://dx.doi.org/10.5194/acpd-12-16557-2012.
Full textAbstract:
Abstract. Elevated concentrations of ground level ozone are both hazardous to human health and detrimental to agricultural production. The Mediterranean Basin, due to its position under the descending branch of the Hadley Cell circulation during the summer months, enjoys periods of stable, sunny and warm weather which provide ideal conditions for the production of ozone. The presence of major population centres and numerous industrialised areas in the coastal zone result in both a continual supply of ozone precursor compounds and also a significant number of people to suffer the consequences of high ozone concentrations. Using the WRF/Chem model validated with data obtained from seven oceanographic measurement campaigns, performed between 2000 and 2010, aboard the Italian Research Council's R. V. Urania, and also from a number of EMEP monitoring stations located around the Mediterranean Basin, the importance of emissions from maritime traffic in the region has been investigated. The model results indicate that over large areas of the Mediterranean emissions from shipping contribute between 5 and 10 ppb to the ground level O3 daily average concentration during the summer. The contribution to the hourly average O3 is up to 40 ppb in some particularly busy shipping lanes. Importantly the results suggest that in a number of coastal areas the contribution from ship emissions to the local O3 concentration can make the difference between complying with the EU Air Quality standard of a maximum 8 h mean of 120 μg m−3 and exceeding it.
47
Sousa, M. C., I. Alvarez, N. Vaz, M. Gomez-Gesteira, and J. M. Dias. "Assessment of Wind Pattern Accuracy from the QuikSCAT Satellite and the WRF Model along the Galician Coast (Northwest Iberian Peninsula)." Monthly Weather Review 141, no. 2 (February 1, 2013): 742–53. http://dx.doi.org/10.1175/mwr-d-11-00361.1.
Full textAbstract:
Abstract Surface wind along the Galician coast is a key factor allowing the analysis of important oceanographic features that are related to the great primary production in this area, as upwelling events. A comparative analysis between surface winds obtained from the Quick Scatterometer (QuikSCAT), the Weather Research and Forecasting (WRF) Model, and in situ observations from buoys along the Galician coast is carried out from November 2008 to October 2009. This comparison evaluates the accuracy of satellite and modeled data. The results show that the wind speeds derived from QuikSCAT and the WRF Model are similar along the coast, with errors ranging from 1.5 to 2 m s−1. However, QuikSCAT tends to overestimate wind speeds when compared to the buoys measurements. Regarding the wind direction, the RMSE values are about 35° for the stations under analysis. The bias presents a similar pattern between satellite and modeled data, with positive values at the western coast and negative values at the middle and northern coasts, the satellite data always being lower in absolute value than the modeled data. A spatial comparison between QuikSCAT and WRF data is also performed over the whole Galician coast to evaluate the differences between the two datasets. This comparison shows that the modeled wind speed tends to be lower than satellite winds over the entire domain, with the highest RMSE and bias values found for the wind speed and direction observed near the shoreline.
48
Albretsen, Jon, Jan Aure, Roald Sætre, and Didrik S. Danielssen. "Climatic variability in the Skagerrak and coastal waters of Norway." ICES Journal of Marine Science 69, no. 5 (December 18, 2011): 758–63. http://dx.doi.org/10.1093/icesjms/fsr187.
Full textAbstract:
Abstract Albretsen, J., Aure, J., Sætre, R., and Danielssen, D. S. 2012. Climatic variability in the Skagerrak and coastal waters of Norway. – ICES Journal of Marine Science, 69: 758–763. The Institute of Marine Research in Norway collects marine data from all national waters. Data are primarily collected from vessels, but observation buoys, manual measurements, and oceanographic gliders are also used. The most valuable long-term data for elucidating decadal hydrographic variability in the Skagerrak and along the Norwegian coast are the time-series from the transect between Norway and Denmark, and observations carried out at eight fixed coastal stations in the region. The time-series date back to the 1950s and the 1930s, respectively, and the observation frequencies range from approximately once a month to 3–4 times per month. The hydrographic data and their long-term fluctuations have been used in several studies, with particular emphasis on the increased salinity and temperature of the 1990s. Trends during the past decade, however, indicate that warming has continued but that a salinity increase is less evident, implying signs of regional warming in parallel with the global warming observed both on land and in the sea. The overall temperature increase off the Norwegian coast at deeper layers from the 1961–1990 period to the 2000–2009 decade is ∼0.8°C, but some of this can be related to natural variability in the North Atlantic circulation pattern.
49
Alin, Simone R., Jan A. Newton, Richard A. Feely, Dana Greeley, Beth Curry, Julian Herndon, and Mark Warner. "A decade-long cruise time series (2008–2018) of physical and biogeochemical conditions in the southern Salish Sea, North America." Earth System Science Data 16, no. 2 (February 8, 2024): 837–65. http://dx.doi.org/10.5194/essd-16-837-2024.
Full textAbstract:
Abstract. Coastal and estuarine waters of the northern California Current system and southern Salish Sea host an observational network capable of characterizing biogeochemical dynamics related to ocean acidification, hypoxia, and marine heatwaves. Here, we compiled data sets from a set of cruises conducted in estuarine waters of Puget Sound (southern Salish Sea) and its boundary waters (Strait of Juan de Fuca and Washington coast). This data product provides data from a decade of cruises with consistent formatting, extended data quality control, and multiple units for parameters such as oxygen with different end use needs and conventions. All cruises obtained high-quality temperature, salinity, inorganic carbon, nutrient, and oxygen observations to provide insight into the dynamic distribution of physical and biogeochemical conditions in this large urban estuary complex on the west coast of North America. At all sampling stations, conductivity–temperature–depth (CTD) casts included sensors for measuring temperature, conductivity, pressure, and oxygen concentrations. Laboratory analyses of discrete water samples collected at all stations throughout the water column in Niskin bottles provided measurements of dissolved inorganic carbon (DIC), dissolved oxygen, nutrient (nitrate, nitrite, ammonium, phosphate, and silicate), and total alkalinity (TA) content. This data product includes observations from 35 research cruises, including 715 oceanographic profiles, with >7490 sensor measurements of temperature, salinity, and oxygen; ≥6070 measurements of discrete oxygen and nutrient samples; and ≥4462 measurements of inorganic carbon variables (i.e., DIC and TA). The observations comprising this cruise compilation collectively characterize the spatial and temporal variability in a region with large dynamic ranges of the physical (temperature = 6.0–21.8 ∘C, salinity = 15.6–34.0) and biogeochemical (oxygen = 12–481 µmol kg−1, dissolved inorganic carbon = 1074–2362 µmol kg−1, total alkalinity = 1274–2296 µmol kg−1) parameters central to understanding ocean acidification and hypoxia in this productive estuary system with numerous interacting human impacts on its ecosystems. All observations conform to the climate-quality observing guidelines of the Global Ocean Acidification Observing Network, the US National Oceanic and Atmospheric Administration's Ocean Acidification Program, and ocean carbon community best practices. This ongoing cruise time series supports the estuarine and coastal monitoring and research objectives of the Washington Ocean Acidification Center and US National Oceanic and Atmospheric Administration (NOAA) Ocean and Atmospheric Research programs, and it provides diverse end users with the information needed to frame biological impacts research, validate numerical models, inform state and tribal water quality and fisheries management, and support decision-makers. All 2008–2018 cruise time-series measurements used in this publication are available at https://doi.org/10.25921/zgk5-ep63 (Alin et al., 2022).
50
Boon, John D. "Reducing Wave-Induced Microwave Water-Level Measurement Error with a Least Squares–Designed Digital Filter*." Journal of Atmospheric and Oceanic Technology 31, no. 2 (February 1, 2014): 491–502. http://dx.doi.org/10.1175/jtech-d-13-00160.1.
Full textAbstract:
Abstract A microwave water-level sensor, the Design Analysis model H-3611i, will soon enter service at tide stations operated by the National Oceanic and Atmospheric Administration’s Center for Operational Oceanographic Products and Services (CO-OPS) as part of the National Water Level Observation Network. CO-OPS tests include a multisensor deployment at the U.S. Army Corps of Engineers Field Research Facility at Duck, North Carolina, to evaluate microwave water-level measurement error over a wide range of Atlantic Ocean sea states. In situ precision and accuracy of processed (6-min average) water level is found to depend on sea state in addition to data processing methods and sensor operating mode. Estimates over selected 6-h measurement periods show that a degree-two polynomial successfully models the increase in sensor standard error with increasing zero-moment (Hm0) wave height but with differences in rate of error increase dependent on the application of a prefilter and choice of sensor operating mode. Prefiltering of 1-Hz “fast mode” sensor output to remove variance at selected wind-wave frequencies can reduce standard error during extreme conditions (Hm0 ≈ 3 m) from approximately ±3 cm without prefiltering to about ±1 cm using a least squares–designed (LSD) digital filter with a 60-s cutoff period. When wave heights are elevated, skewed non-Gaussian distributions develop within the 1-Hz (360 s) sample domain wherein a 3σ outlier elimination process applied without prefiltering can introduce a negative bias of up to 5 cm in individual 6-min water-level averages.