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Journal articles on the topic 'Chlorophyll-a distribution'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

VASILIU, Dan, Mihaela MURESAN, Dan SECRIERU, Sorin BALAN, and Andra BUCSE. "Spatial distribution of Chlorophyll a and Phaeopigments a and the relationships with zooplankton." Geo-Eco-Marina No 23/2017 (December 31, 2017): 177–96. https://doi.org/10.5281/zenodo.1205780.

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Chlorophyll a (Chl a) and phaeopigments a (Phaeo a) spatial distribution in the Western Black Sea was studied in relation to environmental factors and mesozooplankton community. For that purpose, CTD parameters, nutrients, chlorophyll pigments, and mesozooplankton total density and biomass were measured at 33 stations, distributed along the Romanian shelf waters, in June 2016. The studied area was divided into 4 subareas (NIS – northern inner shelf, NOS – northern outer shelf, SIS – southern inner shelf, and SOS – southern outer shelf). The hydrological r

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2

Gómez-Consarnau, Laura, John A. Raven, Naomi M. Levine, et al. "Microbial rhodopsins are major contributors to the solar energy captured in the sea." Science Advances 5, no. 8 (2019): eaaw8855. http://dx.doi.org/10.1126/sciadv.aaw8855.

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All known phototrophic metabolisms on Earth rely on one of three categories of energy-converting pigments: chlorophyll-a (rarely -d), bacteriochlorophyll-a (rarely -b), and retinal, which is the chromophore in rhodopsins. While the significance of chlorophylls in solar energy capture has been studied for decades, the contribution of retinal-based phototrophy to this process remains largely unexplored. We report the first vertical distributions of the three energy-converting pigments measured along a contrasting nutrient gradient through the Mediterranean Sea and the Atlantic Ocean. The highest

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3

Fitrianah, Devi. "Spatial and temporal clustering analysis on chlorophyll-a data distribution." International Journal of Engineering & Technology 7, no. 2.27 (2018): 261. http://dx.doi.org/10.14419/ijet.v7i2.27.13082.

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The motivation of this study is to serve as an alternative approach to most chlorophyll analysis studies that utilize overlay analysis with chlorophyll-a imaging. Mostly, the chlorophyll overlay analysis take many steps in processes, not to mention the bigger the observation duration for the data, the longer it takes to process. In this study, a spatial and temporal clustering analysis was conducted to obtain areas that have abundant chlorophyll-a. The spatial distribution was determined using the DBSCAN algorithm, while the temporal distribution was deter-mined via the fuzzy c-means algorithm

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4

Rosalina, Dwi, Lalu Penta Febri Suryadi, Ani Leilani, et al. "Chlorophyl-a Distribution and Sea Surface Temprature Using Modis Aqua Image Data in Bone Bay Waters." Jurnal Kelautan: Indonesian Journal of Marine Science and Technology 17, no. 1 (2024): 74–82. https://doi.org/10.21107/jk.v17i1.24100.

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ABSTRACTOne of the parameters determining productivity in the sea is chlorophyll-a. The fertility level of chlorophyll-a is closely related to the concentration of chlorophyll-a. The higher the concentration of chlorophyll-a, the higher the water fertility level, conversely, if chlorophyll-a is low, the water fertility level will also be low. One factor influencing growth rate and chlorophyll-a production is temperature. This research aimed to determine the distribution of chlorophyll-a and sea surface temperature based on season in 2022 in the waters of Bone Bay using quantitative descriptive

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5

Daniel, Raja Morga, Alfi Satriadi, and Muslim Muslim. "Horizontal Distribution of Total Suspended Solids (TSS) and Chlorophyll-a at Tirang Beach Semarang." International Journal of Research Publication and Reviews 5, no. 12 (2024): 203–10. https://doi.org/10.55248/gengpi.5.1224.3402.

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6

ISKANDAR, ISKHAQ, QURNIA WULAN SARI, DEDI SETIABUDIDAYA, INDRA YUSTIAN, and BRUCE MONGER. "The distribution and variability of chlorophyll-a bloom in the southeastern tropical Indian Ocean using Empirical Orthogonal Function analysis." Biodiversitas Journal of Biological Diversity 18, no. 4 (2017): 1546–55. http://dx.doi.org/10.13057/biodiv/d180432.

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Iskandar I, Sari QW, Setiabudidaya D, Yustian I, Monger B. 2017. The distribution and variability of chlorophyll-a bloom in the southeastern tropical Indian Ocean using Empirical Orthogonal Function analysis. Biodiversitas 18: 1546-1555. The Indian Ocean Dipole (IOD) events cause anomalously strong upwelling along the sourthen coast of Sumatra-Java leading to the bloom of chlorophylla. An empirical orthogonal function (EOF) analysis was applied to the time series of the satellite-observed chlorophyll-a, sea surface temperature (SST) and surface winds. Spatial eigen functions of the first EOF m

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Antonaru, Laura A., Tanai Cardona, Anthony W. D. Larkum, and Dennis J. Nürnberg. "Global distribution of a chlorophyll f cyanobacterial marker." ISME Journal 14, no. 9 (2020): 2275–87. http://dx.doi.org/10.1038/s41396-020-0670-y.

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8

Riandi, Muhammad, Muhammad Irham, Muhammad Rusdi, Anwar Deli, Faisal Abdullah, and Edy Miswar. "The analysis of chlorophyll-a distribution in fishing areas of Aceh Waters." Depik 12, no. 2 (2023): 137–42. http://dx.doi.org/10.13170/depik.12.2.31405.

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The distribution and abundance of fish are strongly influenced by several oceanographic parameters, one of which is chlorophyll-a. Chlorophyll-a is one of the oceanographic parameters that play an important role in primary productivity in the sea. The distribution of chlorophyll-a contained in phytoplankton can be used as a measure of fertility in water. With advances in geographic information systems or remote sensing, the distribution of chlorophyll-a can be used to estimate fish catchment areas. This study aims to look at the distribution of chlorophyll-a in Aceh waters both spatially and t

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Shykhaleyeva, G. M., G. M. Kiryushkina, and Yu Yu Yurchenko. "Study of photosynthetic pigments in the hyperhaline Kuyalnik Estuary and its inflows (Ukraine, north-western Black sea region)." Visnyk of V. N. Karazin Kharkiv National University series "Ecology", no. 31 (November 28, 2024): 6–19. https://doi.org/10.26565/1992-4259-2024-31-01.

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Purpose. To investigate the interannual and intraannual analysis of the content of chlorophyll "a", "b", "c" and pheophytin in the Kuyalnik estuary (KE) and its tides for the period 2008-2012, to evaluate the spatial distribution of chlorophyll "a" in the water area of the estuary in different seasons year and reveal the connection of the specified characteristics with the abiotic factors of the environment. Methods. Hydrochemical, biological and static analyses. The original geo-informational database of comprehensive monitoring of the KE basin was used. Results. According to the results of g

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10

Wibisana, Hendrata, Siti Zainab, Zetta Rasullia Kamandang, and Muhammad Rusdi. "Analysis of Variance and Correlation Study of Chlorophyll-a in North and South Coast of Lombok Island Using Aqua MODIS Image Data." Aceh International Journal of Science and Technology 9, no. 2 (2020): 102–10. http://dx.doi.org/10.13170/aijst.9.2.16468.

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Chlorophyll-a mapping is widely used in the coastal environment. The mapping results can be utilized as guidance for fishing activities. The presence of chlorophyll-a in phytoplankton is much investigated concerning the existence of fish as a source of livelihood for fishermen around the globe. One method extensively developed is the use of satellite imagery to map the chlorophyll-content in the coastal region from a small area to a global scale, such as Aqua MODIS image data. This study aims to monitor the distribution of chlorophyll-a on the north coast and south coast of Lombok island. Anal

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11

Dewi, Eko Nurcahya, Lukita Purnamayati, and Irwandi Jaswir. "Effects of thermal treatments on the characterisation of microencapsulated chlorophyll extract of Caulerpa racemosa." International Food Research Journal 29, no. 6 (2022): 1279–92. http://dx.doi.org/10.47836/ifrj.29.6.05.

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Caulerpa racemosa is a macroalga that has a green pigment, that is, chlorophyll. Chlorophyll is highly sensitive to damage during heat processing. In the present work, C. racemosa chlorophyll extract was microencapsulated with fish gelatine and Arabic gum coatings, using a freeze-drying technique, to protect against heat damage. The microcapsules were subjected to high temperatures (120, 140, and 160°C) for 5 h. The protective effect of microcapsules on chlorophyll stability was assessed by measuring chlorophylls a and b degradation, total phenolic content, antioxidant activity, functional gro

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12

Moulton, Timothy P., Marcelo L. Souza, Taldi L. Walter, and Felipe A. M. Krsulovic. "Patterns of periphyton chlorophyll and dry mass in a neotropical stream: a cheap and rapid analysis using a hand-held fluorometer." Marine and Freshwater Research 60, no. 3 (2009): 224. http://dx.doi.org/10.1071/mf08081.

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Periphyton distribution is affected by various physical, chemical and biological factors at different scales. In the present study, a cheap and rapid method of measurement was used to obtain the many samples necessary for spatial analysis of periphyton along an altitudinal gradient in a low-order stream in south-east Brazilian Atlantic rain-forest. Fluorescence and turbidity were measured using a hand-held fluorometer and calibrated to the chlorophyll and dry mass of periphyton. Periphyton on the horizontal and vertical surfaces of different boulders was examined and shading and water current

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13

Lucifora, Luis O., Santiago A. Barbini, Edgardo E. Di Giácomo, Juan A. Waessle, and Daniel E. Figueroa. "Estimating the geographic range of a threatened shark in a data-poor region: Cetorhinus maximus in the South Atlantic Ocean." Current Zoology 61, no. 5 (2015): 811–26. http://dx.doi.org/10.1093/czoolo/61.5.811.

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Abstract The distribution of the planktivorous basking shark Cetorhinus maximus is influenced by zooplankton abundance at small scales and temperature at medium scales in the North Atlantic. Here, we estimate the distribution of basking sharks on South Atlantic continental shelves, and the relative importance of chlorophyll concentration, as a proxy for zooplankton abundance, and temperature in determining habitat suitability for basking sharks at large scales. We used maximum entropy (MaxEnt) and maximum likelihood (MaxLike) species distribution modelling to test three hypotheses: the distrib

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14

Bobkov, Sergey, and Ivan Bychkov. "CONTENT OF PHOTOSYNTHETIC PIGMENTS IN ONTOGENESIS OF WILD AND CULTURAL PEA." Vestnik of Kazan State Agrarian University 16, no. 4 (2021): 10–14. http://dx.doi.org/10.12737/2073-0462-2021-10-14.

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The objective consisted in study of wild pea representatives on chlorophyll and carotenoid content for use in producing new varieties with high photosynthetic efficiency and optimal assimilate distribution. The research was conducted in 2016‑2017 in Federal Scientific Center of Legumes and Groat Crops (Orel). Plants were grown on experimental field with density 1.2 million plants/ha on triplicated plots 1 m2. Wild pea accessions k-5322 (asiaticum), k-3370 (elatius), k-4014 (elatius) from VIR collection and varieties Temp and Stabil were used. Wild accessions k-3370 and k-5322 had more chloroph

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15

Irie, Mitsuteru, Yugen Manabe, and Masafumi Yamashita. "Estimation Method of Chlorophyll Concentration Distribution Based on UAV Aerial Images Considering Turbid Water Distribution in a Reservoir." Drones 8, no. 6 (2024): 224. http://dx.doi.org/10.3390/drones8060224.

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The observation of the phytoplankton distribution with a high spatiotemporal resolution is necessary to track the nutrient sources that cause algal blooms and to understand their behavior in response to hydraulic phenomena. Photography from UAVs, which has an excellent temporal and spatial resolution, is an effective method to obtain water quality information comprehensively. In this study, we attempted to develop a method for estimating the chlorophyll concentration from aerial images using machine learning that considers brightness correction based on insolation and the spatial distribution

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16

Fernandez-Rosado, M. J., J. Lucena, and F. X. Niell. "Space-time heterogeneity of the chlorophyll-a distribution in La Concepción reservoir (Istán, Málaga). Representative models." Archiv für Hydrobiologie 129, no. 3 (1994): 311–25. http://dx.doi.org/10.1127/archiv-hydrobiol/129/1994/311.

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17

Setiawan, Heri, Masita Dwi Mandini Manessa, and Supriatna. "Study on Spatio-temporal Distribution of Chlorophyll-a on Pelagic Catch Productivity in Muara Bendera, West Java, Indonesia." Jurnal Ilmiah Perikanan dan Kelautan 16, no. 2 (2024): 349–63. http://dx.doi.org/10.20473/jipk.v16i2.55940.

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Graphical Abstract Highlight Research The trend of chlorophyll-a in the pelagic fish catchment area of the Muara Bendera has increased. Trend of chlorophyll-a values around the waters of the Citarum and Cisadane River Estuaries increased. Chlorophyll-a and pelagic CPUE have a negative relationship. The waters around the mouth of the Citarum River are mesotrophic - eutrophic waters Abstract Chlorophyll-a has been considered an indicator of pelagic fish abundance in waters. Although a high nutrient load causes eutrophication, leading to fish mortality, global-scale climate anomalies will also in

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18

Zdorovennova, Galina, Roman Zdorovennov, Nikolay Palshin, et al. "Hydrophysical factors affecting the distribution of chlorophyll "a" in a small lake." E3S Web of Conferences 420 (2023): 04006. http://dx.doi.org/10.1051/e3sconf/202342004006.

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In recent years due to climate warming algal blooms have been observed in some boreal lakes during summer and autumn months, which reduces the quality of water. We studied the distribution of chlorophyll "a" in Lake Kroshnozero (North-western Russia) in 2021 and 2022. This lake has been used for fisheries for more than 50 years, and currently there is a trout farm there. We studied the influence of temperature, turbidity and transparency of water on the distribution of chlorophyll "a". Low water transparency limits photosynthesis to the upper 1.5-2.5 m layer. The stratification limits the tran

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19

Suharyanto, Suharyanto, Endang Gunaisah, Vicky Rizky Katili, Priyantini Dewi, Febri D. Nugroho, and Hendra Poltak. "Effect of Sea Surface Temperature and Chlorophyll-A on the Total Catches of Lift Net Fishery in the Padang Pariaman Regency, Indonesia." Jurnal Airaha 11, no. 02 (2022): 253–66. http://dx.doi.org/10.15578/ja.v11i02.349.

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The West Sumatera Waters has the potential to be developed for capture fisheries. This potential is utilized through the application of local knowledge for better fishing operations. Fishermen in West Sumatera in determining fishing ground still use the traditional method, namely using previous experience even though on vessels of > 40 GT and it has been assisted by the fish finder. This study aims to analyze the distribution of sea surface temperature (SST) and chlorophyll-a through Aqua Modis satellite imagery interpretation and analyze its effect on boat lift catch from December 2019 to

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20

Wattaqwa, Amira Zul’Ilmi, Indra Jaya, and Muhammad Iqbal. "Prediction of Chlorophyll-a Concentration Distribution Using Generative Adversarial Network (GAN) Algorithm on Processed Remote Sensing Images." BIO Web of Conferences 176 (2025): 01015. https://doi.org/10.1051/bioconf/202517601015.

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Variability of chlorophyll-a concentration in the West Coastal Waters of Sumatra is affected by seasonal wind patterns and the Indian Ocean Dipole (IOD) climate anomaly phenomenon. Positive IOD phases increase chlorophyll-a concentrations and negative IOD phases decrease chlorophyll-a concentrations. The “Ocean Color” remote sensing technique for estimating chlorophyll-a concentration as a parameter of the water quality has several weaknesses, such as cloud obstruction, water depth, and wave reflections that obscure the image. Therefore, deep learning methods with Generative Adversarial Networ

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Prayoga, I. Made Satya, I. Dewa Nyoman Nurweda Putra, and I. Gusti Ngurah Putra Dirgayusa. "Pengaruh Sebaran Konsentrasi Klorofil-a Berdasarkan Citra Satelit terhadap Hasil Tangkapan Ikan Tongkol (Euthynnus sp) Di Perairan Selat Bali." Journal of Marine and Aquatic Sciences 3, no. 1 (2017): 30. http://dx.doi.org/10.24843/jmas.2017.v3.i01.30-46.

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One of fisheries potential in Bali Strait is tuna fish (Euthynnus sp). Tuna fish (Euthynnus sp) resources is highly influenced by waters productivity which indicated by the chlorophyll-a concentration distribution. The aims of this study are: to find out the concentration spatial of chlorophyll-a distribution in Bali strait, to find out temporal variability of chlorophyll-a and tuna fish (Euthynnus sp) in Bali strait, and to find out the influence of chlorophyll-a concentration distribution to the catch of tuna fish (Euthynnus sp) in Bali strait. The analysis of the influence of chlorophyll-a

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Suriani, Mai, Mira Mauliza Rahmi, Ika Kusumawati, Dini Islama, Astrid Fauzia Dewinta, and Heriansyah Heriansyah. "VARIABILITY ANALYSIS OF CHLOROPHYLL-A DISTRIBUTION ON THE COAST OF SOUTHWEST ACEH USING AQUA MODIS IMAGE." Asian Journal of Aquatic Sciences 5, no. 2 (2022): 285–90. http://dx.doi.org/10.31258/ajoas.5.2.285-290.

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Chlorophyll-a has an important role in determining the trophic status and estimation of the fertility level of water. The aim of this study was to analyze the variability of the concentration of chlorophyll-a on the coast of Southwest Aceh. This study uses remote sensing technology using Aqua MODIS imagery, the image used is an annual Level 3 Standard Mapped Image (SMI) chlorophyll-a image with a period of 7 years from 2015 to 2021 and has a spatial resolution of 4 km. The image is processed using software, namely SeaDAS and ArcMap. The results of this study showed that the distribution of the

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Das, Goutam Kumar. "Analysing Sea Surface Temperature and Chlorophyll-a Distribution Along Visakhapatnam Coast Using MODIS Data." Knowledge-Based Engineering and Sciences 5, no. 2 (2024): 19–30. http://dx.doi.org/10.51526/kbes.2024.5.2.19-30.

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Satellite images along with Geographic Information Systems (GIS) are indispensable instruments for the identification, monitoring, and analysis of environmental transformations and management. The primary focus of this study is to investigate the relationship between Sea Surface Temperature (SST) and Chlorophyll-a concentration in the Bay of Bengal along the Visakhapatnam Coast by utilizing MODIS data. The research utilized remote sensing methodologies to accumulate data on SST and Chlorophyll-a concentration from the MODIS Aqua satellite, which provided daily observations for the period of Ja

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NURANI, TRI WIJI, PRIHATIN IKA WAHYUNINGRUM, MUHAMMAD IQBAL, et al. "SKIPJACK TUNA FISHING SEASON AND ITS RELATIONSHIP WITH OCEANOGRAPHIC CONDITIONS IN PALABUHANRATU WATERS, WEST JAVA." Malaysian Applied Biology 51, no. 1 (2022): 137–48. http://dx.doi.org/10.55230/mabjournal.v51i1.2151.

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Skipjack tuna (Katsuwonus pelamis) is the main catch species in Indonesian Palabuhanratu waters. The dynamics of skipjack fishing areas are influenced by oceanographic parameters such as sea surface temperature and chlorophyll-a concentration. This study aims to predict the skipjack fishing season, analyze the dynamics of oceanographic conditions, especially the distribution of sea surface temperature and the distribution of chlorophyll-a, and determine the relationship between skipjack fishing season and the dynamics of the distribution of sea surface temperature and the distribution of chlor

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Fadhilah, A., K. Siahaan, and S. A. Saridu. "Distribution of Chlorophyll-a and Sea Surface Temperature for Skipjack in Nias Water." IOP Conference Series: Earth and Environmental Science 977, no. 1 (2022): 012115. http://dx.doi.org/10.1088/1755-1315/977/1/012115.

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Abstract The fishing area for skipjack is always in a state of change following changes in environmental conditions, which naturally causes fish to choose suitable habitats. Sea surface temperature and chlorophyll-a are factors that affect skipjack fishing areas. The purpose of this study was to look at the potential distribution of sea surface temperature and chlorophyll-a for skipjack fishing areas in the waters of Nias. The data was taken from the Aqua MODIS (Moderate-Resolution Imaging Spectroradiometer) satellite from 2015-2018. Data processing is divided into three seasons, namely transi

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Sampaio de Souza, Christiane, Joana Angélica Guimarães da Luz, Silvio Macedo, Manuel de Jesus Flores Montes, and Paulo Mafalda. "Chlorophyll a and nutrient distribution around seamounts and islands of the tropical south-western Atlantic." Marine and Freshwater Research 64, no. 2 (2013): 168. http://dx.doi.org/10.1071/mf12075.

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Data collected on two large-scale surveys around the seamounts and islands off north-eastern Brazil during 1997 and 1998 provided information on the distribution of Chlorophyll a and inorganic nutrients. During both surveys, the concentrations of Chlorophyll a and nutrients were highly patchy. The highest measurement of Chlorophyll a was 3.91 µg L–1 during 1997. A wide range of nutrient concentrations were found, from undetectable values to a maximum of 17.52 µm L–1 (Si), 1.37 µm L–1 (PO4), 10.02 µm L–1 (NO3) and 0.72 µm L–1 (NO2). In 1998, concentrations of Chlorophyll a and nutrients (nitrit

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Itakura, Kenta, Itchoku Kamakura, and Fumiki Hosoi. "Three-Dimensional Monitoring of Plant Structural Parameters and Chlorophyll Distribution." Sensors 19, no. 2 (2019): 413. http://dx.doi.org/10.3390/s19020413.

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Image analysis is widely used for accurate and efficient plant monitoring. Plants have complex three-dimensional (3D) structures; hence, 3D image acquisition and analysis is useful for determining the status of plants. Here, 3D images of plants were reconstructed using a photogrammetric approach, called “structure from motion”. Chlorophyll content is an important parameter that determines the status of plants. Chlorophyll content was estimated from 3D images of plants with color information. To observe changes in the chlorophyll content and plant structure, a potted plant was kept for five day

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Hosoi, Fumiki, Sho Umeyama, and Kuangting Kuo. "Estimating 3D Chlorophyll Content Distribution of Trees Using an Image Fusion Method Between 2D Camera and 3D Portable Scanning Lidar." Remote Sensing 11, no. 18 (2019): 2134. http://dx.doi.org/10.3390/rs11182134.

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An image fusion method has been proposed for plant images taken using a two-dimensional (2D) camera and three-dimensional (3D) portable lidar for obtaining a 3D distribution of physiological and biochemical plant properties. In this method, a 2D multispectral camera with five bands (475–840 nm) and a 3D high-resolution portable scanning lidar were applied to three sets of sample trees. After producing vegetation index (VI) images from multispectral images, 3D point cloud lidar data were projected onto the 2D plane based on perspective projection, keeping the depth information of each of the li

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Sinaga, Mardame Pangihutan, and Daniel Tony Edyt Siburian. "The Impact of Sea Surface Temperature and Containing Chlorophyll-A on The Results of Skipjack Tuna (Katsuwonus Pelamis) Catch in The Indian Ocean Waters." Journal of Geoscience, Engineering, Environment, and Technology 10, no. 02 (2025): 203–14. https://doi.org/10.25299/jgeet.2025.10.02.21643.

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Oceanographic factors can be an indicator in determining the potential of fishing grounds. The sampling technique of sea surface temperature (SST) and chlorophyll-a data in this study was carried out spatially and temporal using satellite image data which can be downloaded from Aqua MODIS. This study aimed to determine variations in SST distribution and chlorophyll-a concentration in Indian Ocean waters using Aqua MODIS imagery from June 2023 to May 2024; analyzing the relationship between the distribution of SST and chlorophyll-a with the number of pelagic fish catches in the Indian Ocean wat

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Nahari, Rosida Vivin, and Riza Alfita. "Identification of Chlorophyll-A Distribution Using Landsat 8 in Madura." Advanced Science Letters 23, no. 12 (2017): 12333–35. http://dx.doi.org/10.1166/asl.2017.10633.

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Monje, Oscar A., and Bruce Bugbee. "Inherent Limitations of Nondestructive Chlorophyll Meters: A Comparison of Two Types of Meters." HortScience 27, no. 1 (1992): 69–71. http://dx.doi.org/10.21273/hortsci.27.1.69.

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Two types of nondestructive chlorophyll meters were compared with a standard, destructive chlorophyll measurement technique. The nondestructive chlorophyll meters were 1) a custom built, single-wavelength meter, and 2) the recently introduced, dual-wavelength, chlorophyll meter from Minolta (model SPAD-502). Data from both meters were closely correlated with destructive measurements of chlorophyll (r2 = 0.90 and 0.93; respectively) for leaves with chlorophyll concentrations ranging from 100 to 600 mg·m-2, but both meters consistently overestimated chlorophyll outside this range. Although the d

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Pelly, Dandi Arianto, Muh Aris Marfai, Evita Hanie Pangaribowo, and Akhmad Fadholi. "Chlorophyll-a variability during positive IOD - the east season period in 2019 in Padang Sea, Indonesia." E3S Web of Conferences 200 (2020): 06002. http://dx.doi.org/10.1051/e3sconf/202020006002.

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This study aimed to identify the effect of the positive Indian Ocean Dipole (IOD) phenomenon on the spatial, temporal distribution of chlorophyll-a concentrations in the East Season in Padang Sea in 2019. The method used in this research was the Kriging analysis method applied in oceanographic parameter satellite imagery extraction point data. By applying the method, we produced the maps of the spatial distribution variation of chlorophyll-a content and Sea Surface Temperature (SST). The data of IOD events in 2019 showed the occurrence of a strong positive IOD phenomenon that caused anomaly in

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Irham, Muhammad, Maulana Wali Akbar, Mukhlis Mukhli, Afdhal Fuadi, Muhammad Authar, and Ichsan Setiawan. "Catching investigation of yellowfin tuna (Thunnus Albacares) based on the distribution of chlorophyll-a in the North Waters of Aceh: A November and December analysis." E3S Web of Conferences 339 (2022): 02004. http://dx.doi.org/10.1051/e3sconf/202233902004.

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The purpose of this study was to analyze the distribution of chlorophyll-a on the catch of yellowfin tuna in the northern waters of Aceh. This research was conducted in the north of Aceh waters starting from November to December 2020. fish catch data was collected by direct survey in the field by following the activities of fishermen and recording the number of catches. Data on chlorophyll-a was obtained from Aqua Modis satellite imagery. The catch data analysis used the CPUE model, while the chlorophyll-a analysis was carried out using the SeaDas 7.5 and ArcGIS. The results showed that the ca

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Widianingsih, Widianingsih, Retno Hartati, and Hadi Endrawati. "Distribution Pattern of Chlorophyll-a in the Delta Wulan Waters, Demak Regency, Central Java, Indonesia." Jurnal Kelautan Tropis 27, no. 1 (2024): 75–80. http://dx.doi.org/10.14710/jkt.v27i1.21827.

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The Delta Wulan waters are categorized as estuarine waters, which are greatly influenced by the sedimentation from the Wulan River and Serang River. Besides, the Delta Wulan Waters are vulnerable to the impact of pollution from anthropogenic waste. This research aims to examine the distribution pattern of chlorophyll-a and water quality parameters in the Delta Wulan Waters. Samplings were carried out at 12 stations, which were located in the middle of the Delta Wulan waters. One liter of water samples was taken using a Niskin bottle. The water quality measurements were carried out in situ. The

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Firdaus, Mochamad Ramdhan, Arief Rachman, Nurul Fitriya, et al. "Vertical and Horizontal Variability of Chlorophyll-a and Its Relationship with Environmental Parameters in the Waters of Sangihe and Talaud Islands, North Sulawesi, Indonesia." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 29, no. 1 (2024): 119–32. http://dx.doi.org/10.14710/ik.ijms.29.1.119-132.

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The chlorophyll-a is an important biological parameter that could act as a proxy to indicate the abundance of phytoplankton and the primary productivity of an aquatic ecosystem. This paper investigates the vertical and horizontal variability of chlorophyll-a in the waters of Sangihe and Talaud Islands, Indonesia, and its correlation with water environmental parameters. In this study, the distribution of chlorophyll-a, temperature, salinity, and nutrients (NO3 and PO4) from the surface to a depth of 200 m (photic zone) was measured at 29 research stations. The results showed that the distributi

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Huang, Peng, Pan Yang, Libiao Yang, Futong Xiao, Yanqi Feng, and Yuchao Wang. "Non-Destructive Detection and Visualization of Chlorophyll Content in Cherry Tomatoes Based on Hyperspectral Technology and Machine Learning." Agriculture 14, no. 12 (2024): 2247. https://doi.org/10.3390/agriculture14122247.

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The cherry tomato has an important economic value and an increasingly broad market, and the chlorophyll content of cherry tomato leaves can directly reflect the plant’s photosynthetic ability, thus indirectly reflecting its growth status. Therefore, this paper proposes a regression detection method for chlorophyll in cherry tomato leaves by combining machine learning and hyperspectral technology to realize non-destructive, fast, and more accurate detection. Firstly, Moving-Average (MA) preprocessing was chosen as the pretreatment method for this paper, and three regression models of principal

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Sasai, Y., H. Sasaki, and K. J. Richards. "Impact of physical processes on the phytoplankton blooms in the South China Sea: an eddy-resolving physical-biological model study." Biogeosciences Discussions 10, no. 1 (2013): 1577–604. http://dx.doi.org/10.5194/bgd-10-1577-2013.

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Abstract. An eddy-resolving coupled physical-biological ocean model has been employed to investigate the physical influences on phytoplankton blooms in the South China Sea during 2000–2007. The model captures the seasonal and interannual variability of surface chlorophyll distribution associated with mesoscale eddies, ocean circulation and upwelling generated by the monsoon winds. The model also reproduces the high chlorophyll distributions in two coastal upwelling regions: the northwestern Luzon in winter and the eastern coast of Vietnam in summer. To the northwest of Luzon, the monsoon drive

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VASILIU, Dan, Marian Traian GOMOIU, Laura BOICENCO, Luminita LAZAR, and Florin TIMOFTE. "Chlorophyll a distribution in the Romanian Black Sea inner shelf waters in 2009 ." Geo-Eco-Marina No 16/2010 (December 31, 2010): 19–28. https://doi.org/10.5281/zenodo.56947.

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Abstract. In 2009, seasonal and spatial variability of surface chlorophyll a in Romanian inner shelf waters was studied on the basis of samples collected during four seasonal cruises conducted both in the Danube mouths and Constanta areas. The seasonal distribution showed three peaks; the first one was recorded in February (6.22 ± 2.63 μg/l), followed by a more pronounced one in early May (9.47 ± 6.88 μg/l) corresponding to the Danube’s higher discharges in spring. After a relatively low chlorophyll a in July, there was found the third peak in September (10.29 &plusmn

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Wianta, I. Putu Gede Bayu Ade, Ni Luh Watiniasih, and Ni Luh Putu Ria Puspitha. "Distribusi Spasial Klorofil-A di Perairan Teluk Benoa Bali." Journal of Marine and Aquatic Sciences 7, no. 2 (2021): 205. http://dx.doi.org/10.24843/jmas.2021.v07.i02.p09.

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Benoa Bay is an estuary that gets input of waste and nutrients from six rivers and inderectly influenced water productivity in Benoa Bay. The nutrients flow from the river to domestic, industrial, and agricultural activities into Benoa Bay. The amount of nutrient inputs accumulated in Benoa Bay this could affect the chlorophyll-a consentrations. The purpose of this study was to determine the spatial distribution and influence nitrate and phosphate on chlorophyll-a concentration. Water surface sampling carried out on February 2019. The method used was purposive sampling and chlorophyll-a concen

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Yulius, Yulius, Vaninda Aidina, Muhammad Ramdhan, and August Daulat. "Fishing Ground Mapping Based on Chlorophyll-A Distribution Using Aqua Modis Satellite Imagery in The Fisheries Management Area (FMA) 712." E3S Web of Conferences 324 (2021): 01007. http://dx.doi.org/10.1051/e3sconf/202132401007.

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The fishing ground is identical and closely related to chlorophyll-a abundance in the waters, associated with its fisheries potential. This research has been conducted to determine the concentration and distribution of chlorophyll-a in the seas, especially in the Fisheries Management Area (FMA) 712 encompassing the Java Sea. The analysis used monthly time-series data collected from the satellite imagery over the last 11 years, taken through the ERDDAP website. The mean concentration of chlorophyll-a in the study area was 1.13 mg/l in June 2013. Based on 11 years of data processing, it can be c

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Thushara, Venugopal, Puthenveettil Narayana Menon Vinayachandran, Adrian J. Matthews, Benjamin G. M. Webber, and Bastien Y. Queste. "Vertical distribution of chlorophyll in dynamically distinct regions of the southern Bay of Bengal." Biogeosciences 16, no. 7 (2019): 1447–68. http://dx.doi.org/10.5194/bg-16-1447-2019.

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Abstract. The Bay of Bengal (BoB) generally exhibits surface oligotrophy due to nutrient limitation induced by strong salinity stratification. Nevertheless, there are hotspots of high chlorophyll in the BoB where the monsoonal forcings are strong enough to break the stratification; one such region is the southern BoB, east of Sri Lanka. A recent field programme conducted during the summer monsoon of 2016, as a part of the Bay of Bengal Boundary Layer Experiment (BoBBLE), provides a unique high-resolution dataset of the vertical distribution of chlorophyll in the southern BoB using ocean glider

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MANNA, J. S., M. K. MITRA, S. MUKHERJEE, and G. C. DAS. "HIGH DIELECTRIC CONSTANT COMPOSITE BASED ON CHLOROPHYLL A ENTRAPPED NANOPOROUS SILICA GEL." Journal of Advanced Dielectrics 02, no. 03 (2012): 1250016. http://dx.doi.org/10.1142/s2010135x12500166.

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Chlorophyll a (naturally occurring Mg porphyrene) has been entrapped in nano/porous silica gel using sol–gel method at room temperature, producing a stable composite. HRTEM observation reveals regular nanoscale [around 15–20 nm diameter] distribution of aggregated polycrystalline chlorophyll a within porous silica matrix. UV-vis study also corroborates the presence of various aggregated chlorophyll a species within the system. Low field measurement shows almost 400 times enhancement of dielectric constant (1700) with incorporation of only 0.125 mg/ml of chlorophyll and the loss is 0.5 at room

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Jamshidi, S., and N. Bin Abu Bakar. "A study on distribution of chlorophyll-<I>a</I> in the coastal waters of Anzali Port, south Caspian Sea." Ocean Science Discussions 8, no. 1 (2011): 435–51. http://dx.doi.org/10.5194/osd-8-435-2011.

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Abstract. Phytoplankton as chlorophyll-containing organisms is the first step of production in most marine processes and food chains. Nutrient enhancement in the seawater due to the discharge of agricultural, industrial, and urban wastes threatens the Caspian Sea environment. Increasing concentrations of chlorophyll-a in seawater, in reaction to the elevation of nutrient supply can have severely damaging effects on the marine environment of the Caspian. In this research, seasonal variability of the chlorophyll-a concentrations in the western part of the southern coastal waters of the Caspian S

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Saputra, A. N., D. Arisanty, M. Muhaimin, and S. Adyatma. "Empirical modeling of the distribution of chlorophyll-a in riam kanan reservoir." IOP Conference Series: Earth and Environmental Science 1089, no. 1 (2022): 012008. http://dx.doi.org/10.1088/1755-1315/1089/1/012008.

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Abstract Monitoring inland water quality through remote sensing is an alternative method. Broad remote sensing image coverage has the potential to increase the scope of monitoring. Remote sensing imagery is very suitable for monitoring in the Riam Kanan Reservoir which has a normal water level of 3200 Ha. Community activities for fisheries and tourism have the potential to increase nutrients and water fertility. The impact is in the form of an explosion of algal micro population which has a negative effect on the aquatic ecosystem and the surrounding population. Landsat 8 OLI was used in this

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Zikri, Muhammad Alfi, Hendrik Anggi Setyawan, and Bambang Argo Wibowo. "Analysis of Fringescale Sardine Fishing Grounds (Sardinella fimbriata) Based on Sea Surface Temperature and Chlorophyll-A in Tegal Waters, Indonesia." Asian Journal of Fisheries and Aquatic Research 25, no. 4 (2023): 139–48. http://dx.doi.org/10.9734/ajfar/2023/v25i4691.

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An alternative that can be done in determining the fishing area is to use remote sensing technology through the approach of sea surface temperature distribution and chlorophyll-a. The purpose of this study was to determine the value of the distribution of sea surface temperature and chlorophyll-a, as well as analyze the relationship between sea surface temperature and chlorophyll-a on Fringescale sardine (Sardinella fimbriata). The research method used is the descriptive method. The research data taken are in-situ data and SNPP Viirs satellite imagery data, as well as capture data from 2018 –

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Handoko, Eko, Noorlaila Hayati, Muhammad Syariz, and Megivareza Hanansyah. "Analysis of Chlorophyll-a Variability in the Eastern Indonesian Waters Using Sentinel-3 OLCI from 2020-2021." Forum Geografi 38, no. 1 (2024): 74–82. http://dx.doi.org/10.23917/forgeo.v38i1.2361.

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The Eastern Indonesian waters are significant in influencing the global climate system and oceanic connectivity. However, the Indonesian Through Flow (ITF) facilitates the movement of waters from the Pacific Ocean to the Indian Ocean. This flow vertically mixes water masses in the Eastern regions, leading to the concentration of phytoplankton. In addition, the distribution of phytoplankton, indicative of chlorophyll-a concentration, is influenced by upwelling and downwelling phenomena. Chlorophyll-a, responsible for capturing carbon and producing oxygen in marine ecosystems, is important in re

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Ekayana, I. Made, I. Wayan Gede Astawa Karang, Abd Rahman As-syakur, Irwan Jatmiko, and Dian Novianto. "Hubungan Hasil Tangkapan Ikan Tuna Selama Februari-Maret 2016 dengan Konsentrasi Klorofil-a dan SPL dari Data Penginderaan Jauh Di Perairan Selatan Jawa – Bali." Journal of Marine and Aquatic Sciences 3, no. 1 (2017): 19. http://dx.doi.org/10.24843/jmas.2017.v3.i01.19-29.

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Indonesia waters are fertile waters marked by the existence of Regional Fisheries Management (WPP), one of them is WPP 573 in Southern Java. One of the biggest fish catch sectors in Indonesia is tuna fisheries. Distribution of tuna in Indonesia waters affected by Sea Surface Temperature (SST) and chlorophyll-a. The aims of this study is to analyze the distribution of chlorophyll-a and SST in the water of South Java - Bali using AQUA MODIS satellite through data in-situ, to know the accuracy of SST Ground Truth and SST imagery satellite and to find the relationship between chlorophyll-a and SST

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Oh, Thomas, Jittiwat Sermsripong, and Barry W. Hicks. "Using Scuba for In Situ Determination of Chlorophyll Distributions in Corals by Underwater Near Infrared Fluorescence Imaging." Journal of Marine Science and Engineering 8, no. 1 (2020): 53. http://dx.doi.org/10.3390/jmse8010053.

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Studies reporting quantitation and imaging of chlorophyll in corals using visible fluorescent emission in the red near 680 nm can suffer from competing emission from other red-emitting pigments. Here, we report a novel method of selectively imaging chlorophyll distributions in coral in situ using only the near infrared (NIR) fluorescence emission from chlorophyll. Commercially available equipment was assembled that allowed the sequential imaging of visible, visible-fluorescent, and NIR-fluorescent pigments on the same corals. The relative distributions of chlorophyll and fluorescent proteins (

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Makarevich, P. R., V. V. Vodopianova, A. S. Bulavina, P. S. Vashenko, and M. S. Makhotin. "Influence of river water expansion on the spatial distribution of chlorophyll-a in the Kara Sea." IOP Conference Series: Earth and Environmental Science 839, no. 5 (2021): 052004. http://dx.doi.org/10.1088/1755-1315/839/5/052004.

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Abstract In August-September 2013, the thermohaline characteristics of water masses and the concentration of chlorophyll-a were studied in the Kara Sea. Expansion of surface desalinated water to the north, according to the central type, influenced the spatial distribution of chlorophyll. Beyond the boundary of the Stock Front, the average pigment concentration in the surface layer was 0.45±0.16 mg/m3. In the area affected by the surface desalinated layer, most of the chlorophyll (0 m – 1.04±0.27 mg/m3, 5 m – 0.97±0.27 mg/m3, 10 m – 0.69±0.36 mg/m3) was localized within this layer (10-17 m). Hi

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Trenggono, Mukti, Amron Amron, Wanda Avia Pasha, and Damar Lazuardy Rolian. "Effects of el nino on distribution of chlorophyll-a and sea surface temperature in northen to southern sunda strait." E3S Web of Conferences 47 (2018): 05004. http://dx.doi.org/10.1051/e3sconf/20184705004.

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Sunda Strait is an important passage for the Java Sea water to flow into the Indian Ocean. There is Java sea in North close to Karimata Strait and Eastern Indian Ocean in South part. Headed from north to south of Sunda Strait, has a high primary productivity that signifies the fertility of water. The strong El Nino (SOI) in 2015, hypothesized to affect variability values of a-chlorophyll content and sea surface temperature in this area. The research aims to know the distribution pattern of chlorophyll-a, and sea surface temperature due to El Nino effect on transition season I (March, April and

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