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Articles de revues sur le sujet « Atlantic Ocean Region »

Auteur : Grafiati

Publié le 10 mars 2023

Mis à jour le 31 juillet 2025

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1

Formetta, Giuseppe, Jonghun Kam, Sahar Sadeghi, Glenn Tootle, and Thomas Piechota. "Atlantic Ocean Variability and European Alps Winter Precipitation." Water 13, no. 23 (2021): 3377. http://dx.doi.org/10.3390/w13233377.

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Winter precipitation (snowpack) in the European Alps provides a critical source of freshwater to major river basins such as the Danube, Rhine, and Po. Previous research identified Atlantic Ocean variability and hydrologic responses in the European Alps. The research presented here evaluates Atlantic Sea Surface Temperatures (SSTs) and European Alps winter precipitation variability using Singular Value Decomposition. Regions in the north and mid-Atlantic from the SSTs were identified as being tele-connected with winter precipitation in the European Alps. Indices were generated for these Atlanti

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Walter, S., H. W. Bange, U. Breitenbach, and D. W. R. Wallace. "Nitrous oxide in the North Atlantic Ocean." Biogeosciences Discussions 3, no. 4 (2006): 993–1022. http://dx.doi.org/10.5194/bgd-3-993-2006.

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Abstract. In order to investigate the role of the North Atlantic Ocean as a source of atmospheric nitrous oxide and to decipher the major formation pathways of nitrous oxide, measurements of dissolved nitrous oxide were made during three cruises in the tropical, subtropical and subpolar North Atlantic in October/November 2002, March/April 2004, and May 2002, respectively. Nitrous oxide was close to equilibrium or slightly supersaturated in the surface layers suggesting that the North Atlantic acts as a weak source of nitrous oxide to the atmosphere. Depth profiles showed supersaturation throug

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Dong, Shenfu, Silvia Garzoli, and Molly Baringer. "The Role of Interocean Exchanges on Decadal Variations of the Meridional Heat Transport in the South Atlantic." Journal of Physical Oceanography 41, no. 8 (2011): 1498–511. http://dx.doi.org/10.1175/2011jpo4549.1.

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Abstract The interocean exchange of water from the South Atlantic with the Pacific and Indian Oceans is examined using the output from the ocean general circulation model for the Earth Simulator (OFES) during the period 1980–2006. The main objective of this paper is to investigate the role of the interocean exchanges in the variability of the Atlantic meridional overturning circulation (AMOC) and its associated meridional heat transport (MHT) in the South Atlantic. The meridional heat transport from OFES shows a similar response to AMOC variations to that derived from observations: a 1 Sv (1 S

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Yu, Wei, Weiqing Han, and David Gochis. "Influence of the Madden–Julian Oscillation and Intraseasonal Waves on Surface Wind and Convection of the Tropical Atlantic Ocean." Journal of Climate 25, no. 23 (2012): 8057–74. http://dx.doi.org/10.1175/jcli-d-11-00528.1.

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Abstract Atmospheric intraseasonal variability in the tropical Atlantic is analyzed using satellite winds, outgoing longwave radiation (OLR), and reanalysis products during 2000–08. The analyses focus on assessing the effects of dominant intraseasonal atmospheric convective processes, the Madden–Julian oscillation (MJO), and Rossby waves on surface wind and convection of the tropical Atlantic Ocean and African monsoon area. The results show that contribution from each process varies in different regions. In general, the MJO events dominate the westward-propagating Rossby waves in affecting str

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Walter, S., H. W. Bange, U. Breitenbach, and D. W. R. Wallace. "Nitrous oxide in the North Atlantic Ocean." Biogeosciences 3, no. 4 (2006): 607–19. http://dx.doi.org/10.5194/bg-3-607-2006.

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Abstract. In order to get a comprehensive picture of the distribution of nitrous oxide (N2O) in the North Atlantic Ocean, measurements of dissolved nitrous oxide were made during three cruises in the tropical, subtropical and cold-temperate North Atlantic Ocean in October/November 2002, March/April 2004, and May 2002, respectively. To account for the history of atmospheric N2O, we suggest a new depth-dependent calculation of excess N2O (ΔN2O). N2O depth profiles showed supersaturation throughout the water column with a distinct increasing trend from the cold-temperate to the tropical region. L

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Rus Hoelzel, A., Mahmood S. Shivji, Jennifer Magnussen, and Malcolm P. Francis. "Low worldwide genetic diversity in the basking shark ( Cetorhinus maximus )." Biology Letters 2, no. 4 (2006): 639–42. http://dx.doi.org/10.1098/rsbl.2006.0513.

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The basking shark ( Cetorhinus maximus ) is found in temperate waters throughout the world's oceans, and has been subjected to extensive exploitation in some regions. However, little is known about its current abundance and genetic status. Here, we investigate the diversity of the mitochondrial DNA control region among samples from the western North Atlantic, eastern North Atlantic, Mediterranean Sea, Indian Ocean and western Pacific. We find just six haplotypes defined by five variable sites, a comparatively low genetic diversity of π =0.0013 and no significant differentiation between ocean b

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Bellomo, Katinka, Amy C. Clement, Thorsten Mauritsen, Gaby Rädel, and Bjorn Stevens. "The Influence of Cloud Feedbacks on Equatorial Atlantic Variability." Journal of Climate 28, no. 7 (2015): 2725–44. http://dx.doi.org/10.1175/jcli-d-14-00495.1.

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Abstract Observations show that cloud feedback over the Namibian stratocumulus region is positive because cloud cover is anticorrelated with local sea surface temperature (SST) anomalies. Moreover, regressions of observed atmospheric fields on equatorial Atlantic SST anomalies indicate that cloud feedbacks over the Namibian stratocumulus region covary with Atlantic Niño. However, from observations alone, it is not possible to quantify the influence of regional cloud feedbacks on equatorial climate variability. To address this question, a set of sensitivity experiments are conducted using an at

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Pandey, Hemant Kumar, and Akhilesh Dwivedi. "STRATEGIC ROLE OF INDIAN NAVY IN IOR AT PRESENT." SCHOLARLY RESEARCH JOURNAL FOR HUMANITY SCIENCE AND ENGLISH LANGUAGE 9, no. 46 (2021): 11318–25. http://dx.doi.org/10.21922/srjhsel.v9i46.1541.

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The Indian Ocean Region (IOR) turned out to be the most engaging region for global activities in recent years. The Indian Ocean consists of the most important trade routes of the world. The Indian Ocean provides a way to move through various regions of the world. World's huge economic players always keep an eye on the IOR for its strategic importance. The Indian Ocean is a gateway to the Atlantic Ocean through the Mediterranean Sea via the Red Sea and it also provides a way to the Pacific Ocean through the Strait of Malacca. It is the main shipping channel for the Pacific and Atlantic oceans.

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Bremer, Jaime R. Alvarado, Allan J. Baker, and Jaime Mejuto. "Mitochondrial DNA control region sequences indicate extensive mixing of swordfish (Xiphias gladius) populations in the Atlantic Ocean." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 8 (1995): 1720–32. http://dx.doi.org/10.1139/f95-764.

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Pacific, Atlantic, and Mediterranean populations of the swordfish (Xiphias gladius) are currently considered as separate fisheries management units, and populations in different regions of the Atlantic are thought to constitute different stocks on the basis of recapture data. To test these hypotheses we sequenced hypervariable segments of the control region of mitochondrial DNA in 35 swordfish from three regions of the Atlantic, as well as in 8 and 7 individuals from the Pacific and Mediterranean regions, respectively. Sixty of the 81 variable sites were confined to a 280 base pair stretch in

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Joshi, Manish K., Muhammad Adnan Abid, and Fred Kucharski. "The Role of an Indian Ocean Heating Dipole in the ENSO Teleconnection to the North Atlantic European Region in Early Winter during the Twentieth Century in Reanalysis and CMIP5 Simulations." Journal of Climate 34, no. 3 (2021): 1047–60. http://dx.doi.org/10.1175/jcli-d-20-0269.1.

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AbstractIn this study the role of an Indian Ocean heating dipole anomaly in the transition of the North Atlantic–European (NAE) circulation response to El Niño–Southern Oscillation (ENSO) from early to late winter is analyzed using a twentieth-century reanalysis and simulations from phase 5 of the Coupled Model Intercomparison Project (CMIP5). It is shown that in early winter a warm (cold) ENSO event is connected through an atmospheric bridge with positive (negative) rainfall anomalies in the western Indian Ocean and negative (positive) anomalies in the eastern Indian Ocean. The early winter h

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Stocker, Thomas F., and Daniel G. Wright. "The Effect of a Succession of Ocean Ventilation Changes on 14C." Radiocarbon 40, no. 1 (1997): 359–66. http://dx.doi.org/10.1017/s0033822200018233.

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Using the model of Stacker and Wright (1996), we investigate the effect of a succession of ocean ventilation changes on the atmospheric concentration of radiocarbon, δ14Catm, the surface reservoir ages, the top-to-bottom age differences, and the calendar-14C age relationships in different regions of the ocean. The model includes a representation of the cycling of 14C through the atmosphere, the ocean and the land biosphere. Ocean ventilation changes are triggered by increasing rates of freshwater discharge into the North Atlantic, which are determined according to a simple feedback mechanism b

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Dey, Dipanjan, Aitor Aldama Campino, and Kristofer Döös. "Atmospheric water transport connectivity within and between ocean basins and land." Hydrology and Earth System Sciences 27, no. 2 (2023): 481–93. http://dx.doi.org/10.5194/hess-27-481-2023.

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Abstract. The global atmospheric water transport from the net evaporation to the net precipitation regions has been traced using Lagrangian trajectories. A matrix has been constructed by selecting various group of trajectories based on their surface starting (net evaporation) and ending (net precipitation) positions to show the connectivity of the 3-D atmospheric water transport within and between the three major ocean basins and the global landmass. The analysis reveals that a major portion of the net evaporated water precipitates back into the same region, namely 67 % for the Indian Ocean, 6

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Zhao, Ping, Song Yang, Renguang Wu, Zhiping Wen, Junming Chen, and Huijun Wang. "Asian Origin of Interannual Variations of Summer Climate over the Extratropical North Atlantic Ocean." Journal of Climate 25, no. 19 (2012): 6594–609. http://dx.doi.org/10.1175/jcli-d-11-00617.1.

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Abstract The authors have identified an interannual relationship between Asian tropospheric temperature and the North Atlantic Ocean sea surface temperature (SST) during summer (May–September) and discussed the associated features of atmospheric circulation over the Atlantic–Eurasian region. When tropospheric temperature is high (low) over Asia, positive (negative) SST anomalies appear in the extratropical North Atlantic. This relationship is well supported by the changes in background atmospheric circulation and ocean–atmosphere–land thermodynamic processes. When heat transfer from the land s

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Pérez-Alarcón, Albenis, Rogert Sorí, José Carlos Fernández-Alvarez, Raquel Nieto, and Luis Gimeno. "Moisture Sources for Tropical Cyclones Genesis in the Coast of West Africa through a Lagrangian Approach." Environmental Sciences Proceedings 4, no. 1 (2020): 3. http://dx.doi.org/10.3390/ecas2020-08126.

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Atmospheric moisture transport plays an important role in the genesis of tropical cyclones (TCs). In this study, the moisture sources associated with the genesis of TCs in the tropical Atlantic Ocean near West Africa, from June to November in the period 1980–2018, were identified. To detect the location of the TCs geneses, the HURDAT2 database from the National Hurricane Center was used. Additionally, global outputs of the Lagrangian FLEXPART model were used to determine the moisture sources that provided water vapor for the genesis of TCs. This model permitted us to track backward in time the

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Muñoz, Ernesto, Wilbert Weijer, Semyon A. Grodsky, Susan C. Bates, and Ilana Wainer. "Mean and Variability of the Tropical Atlantic Ocean in the CCSM4*." Journal of Climate 25, no. 14 (2012): 4860–82. http://dx.doi.org/10.1175/jcli-d-11-00294.1.

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Abstract This study analyzes important aspects of the tropical Atlantic Ocean from simulations of the fourth version of the Community Climate System Model (CCSM4): the mean sea surface temperature (SST) and wind stress, the Atlantic warm pools, the principal modes of SST variability, and the heat budget in the Benguela region. The main goal was to assess the similarities and differences between the CCSM4 simulations and observations. The results indicate that the tropical Atlantic overall is realistic in CCSM4. However, there are still significant biases in the CCSM4 Atlantic SSTs, with a cold

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Kadiri, Medina Omo, and Osasere Abike Omoruyi. "Dynamics of Odontella spp. in the Atlantic Ocean of Nigeria." Nova Hedwigia 110, no. 3 (2020): 227–46. http://dx.doi.org/10.1127/nova_hedwigia/2020/0578.

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Odontella is a planktonic centric diatom widely distributed in saline waters. Although some studies on marine phytoplankton in Nigeria mention the genus, there is a considerable dearth of information on its distribution in the Atlantic Ocean (Nigeria). This paper examined the density, diversity, spatial and temporal distribution of Odontella species in the Atlantic Ocean, in the Bight of Benin and Bight of Bonny (Nigeria). Phytoplankton samples were collected from 10 locations on the stretch of the Atlantic Ocean (Nigeria), in four seasons (dry-wet, wet, wet-dry and dry). Results revealed that

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Borchert, Leonard F., Wolfgang A. Müller, and Johanna Baehr. "Atlantic Ocean Heat Transport Influences Interannual-to-Decadal Surface Temperature Predictability in the North Atlantic Region." Journal of Climate 31, no. 17 (2018): 6763–82. http://dx.doi.org/10.1175/jcli-d-17-0734.1.

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An analysis of a three-member ensemble of initialized coupled simulations with the MPI-ESM-LR covering the period 1901–2010 shows that Atlantic northward ocean heat transport (OHT) at 50°N influences surface temperature variability in the North Atlantic region for several years. Three to ten years after strong OHT phases at 50°N, a characteristic pattern of sea surface temperature (SST) anomalies emerges: warm anomalies are found in the North Atlantic and cold anomalies emerge in the Gulf Stream region. This pattern originates from persistent upper-ocean heat content anomalies that originate f

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Steinfeldt, R., T. Tanhua, J. L. Bullister, R. M. Key, M. Rhein, and J. Köhler. "Atlantic CFC data in CARINA." Earth System Science Data Discussions 2, no. 1 (2009): 27–61. http://dx.doi.org/10.5194/essdd-2-27-2009.

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Abstract. Water column data of carbon and carbon-relevant parameters have been collected and merged into a new database called CARINA (CARbon IN the Atlantic). In order to provide a consistent data set, all data have been examined for systematic biases and adjusted if necessary (secondary quality control (QC)). The CARINA data set is divided into three regions: the Arctic/Nordic Seas, the Atlantic region and the Southern Ocean. Here we present the CFC data for the Atlantic region, including the chlorofluorocarbons CFC-11, CFC-12 and CFC-113 as well as carbon tetrachloride (CCl4). The methods a

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Steinfeldt, R., T. Tanhua, J. L. Bullister, R. M. Key, M. Rhein, and J. Köhler. "Atlantic CFC data in CARINA." Earth System Science Data 2, no. 1 (2010): 1–15. http://dx.doi.org/10.5194/essd-2-1-2010.

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Abstract. Water column data of carbon and carbon-relevant parameters have been collected and merged into a new database called CARINA (CARbon IN the Atlantic). In order to provide a consistent data set, all data have been examined for systematic biases and adjusted if necessary (secondary quality control (QC)). The CARINA data set is divided into three regions: the Arctic/Nordic Seas, the Atlantic region and the Southern Ocean. Here we present the CFC data for the Atlantic region, including the chlorofluorocarbons CFC-11, CFC-12 and CFC-113 as well as carbon tetrachloride (CCl4). The methods a

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Wu, Qiaoyan, and Yilei Wang. "Comparison of Oceanic Multisatellite Precipitation Data from Tropical Rainfall Measurement Mission and Global Precipitation Measurement Mission Datasets with Rain Gauge Data from Ocean Buoys." Journal of Atmospheric and Oceanic Technology 36, no. 5 (2019): 903–20. http://dx.doi.org/10.1175/jtech-d-18-0152.1.

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AbstractThree satellite-derived precipitation datasets [the Tropical Rainfall Measuring Mission Multisatellite Precipitation Analysis (TMPA) dataset, the NOAA Climate Prediction Center morphing technique (CMORPH) dataset, and the newly available Integrated Multisatellite Retrievals for Global Precipitation Measurement (IMERG) dataset] are compared with data obtained from 55 rain gauges mounted on floating buoys in the tropics for the period 1 April 2014–30 April 2017. All three satellite datasets underestimate low rainfall and overestimate high rainfall in the tropical Pacific Ocean, but the T

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Kuijpers, Antoon, Jørn Bo Jensen, Simon R. Troelstra, and And shipboard scientific party of RV Professor Logachev and RV Dana. "Late Quaternary palaeo-oceanography of the Denmark Strait overflow pathway, South-East Greenland margin." Geology of Greenland Survey Bulletin 180 (December 31, 1998): 163–67. http://dx.doi.org/10.34194/ggu-bulletin.v180.6514.

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Direct interaction between the atmosphere and the deep ocean basins takes place today only in the Southern Ocean near the Antarctic continent and in the northern extremity of the North Atlantic Ocean, notably in the Norwegian–Greenland Sea and Labrador Sea. Cooling and evaporation cause surface waters in the latter region to become dense and sink. At depth, further mixing occurs with Arctic water masses from adjacent polar shelves. Export of these water masses from the Norwegian–Greenland Sea (Norwegian Sea Overflow Water) to the North Atlantic basin occurs via two major gateways, the Denmark

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Kuijpers, Antoon, Jørn Bo Jensen, Simon R. Troelstra, and And shipboard scientific party of RV Professor Logachev and RV Dana. "Late Quaternary palaeo-oceanography of the Denmark Strait overflow pathway, South-East Greenland margin." Geology of Greenland Survey Bulletin 180 (December 31, 1998): 163–67. http://dx.doi.org/10.34194/ggub.v180.6514.

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Direct interaction between the atmosphere and the deep ocean basins takes place today only in the Southern Ocean near the Antarctic continent and in the northern extremity of the North Atlantic Ocean, notably in the Norwegian–Greenland Sea and Labrador Sea. Cooling and evaporation cause surface waters in the latter region to become dense and sink. At depth, further mixing occurs with Arctic water masses from adjacent polar shelves. Export of these water masses from the Norwegian–Greenland Sea (Norwegian Sea Overflow Water) to the North Atlantic basin occurs via two major gateways, the Denmark

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Kisesa, Makula, Marie Umutoni, Lovina Japheth, Elias Lipiki, Laban Kebacho, and Shelleph Tilwebwa. "The covariability of sea surface temperature and MAM rainfall on East Africa using singular value decomposition analysis." Geographica Pannonica 24, no. 4 (2020): 261–70. http://dx.doi.org/10.5937/gp24-27577.

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The study assesses the covariability of Sea Surface Temperature (SST) and March to May (MAM) rainfall variability on East Africa (EA) from 1981 to 2018. Singular Value Decomposition (SVD) analysis reveals the significant influence of SST anomalies on MAM rainfall, with covariability of 91%, 88.61%, and 82.9% for Indian, Atlantic, and the Pacific Ocean, respectively. The Indian Ocean explains the variability of rainfall to the large extent followed by the Atlantic Ocean and the Pacific Ocean. The rainfall patterns over the EA correspond to SST variability over the western, central, and Eastern

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Cessi, Paola. "The Effect of Northern Hemisphere Winds on the Meridional Overturning Circulation and Stratification." Journal of Physical Oceanography 48, no. 10 (2018): 2495–506. http://dx.doi.org/10.1175/jpo-d-18-0085.1.

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AbstractThe current paradigm for the meridional overturning cell and the associated middepth stratification is that the wind stress in the subpolar region of the Southern Ocean drives a northward Ekman flow, which, together with the global diapycnal mixing across the lower boundary of the middepth waters, feeds the upper branch of the interhemispheric overturning. The resulting mass transport proceeds to the Northern Hemisphere of the North Atlantic, where it sinks, to be eventually returned to the Southern Ocean at depth. Seemingly, the wind stress in the Atlantic basin plays no role. This as

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von Schuckmann, Karina, Lorena Moreira, Mathilde Cancet, et al. "The state of the ocean in the northeastern Atlantic and adjacent seas." State of the Planet 4-osr8 (September 30, 2024): 1–32. http://dx.doi.org/10.5194/sp-4-osr8-2-2024.

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Abstract. In this paper, the Copernicus Ocean State Report offers detailed scientific analysis of the ocean under climate change, ocean variability, and ocean extremes in the northeastern Atlantic and adjacent seas. Major results show that the northeastern Atlantic Ocean and adjacent seas have experienced consistent warming, with sea surface temperatures increasing at a rate of 0.25 ± 0.03 °C per decade since 1982, doubling the global average trend. This warming is most pronounced in the Black Sea, Mediterranean Sea, and Baltic Sea. Sea levels have risen significantly over the past 30 years, p

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Sokov, A. V. "TO THE 80th ANNIVERSARY OF BYSHEV – A MEMBER OF THE POLYGON–70 EXPEDITION." Journal of Oceanological Research 48, no. 3 (2020): 236–43. http://dx.doi.org/10.29006/1564-2291.jor-2020.48(3).14.

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The article is dedicated to the 80th anniversary of Dr. Vladimir I. Byshev – mathematician, oceanologist, Head of the Laboratory of large-scale variability of hydrophysical fields of the Shirshov Institute of Oceanology of Russian Academy of Sciences. Vladimir Byshev is a major scientist in the study of the temporal and spatial variability of oceanological and meteorological characteristics in a wide range of scales, features of the interaction of the ocean and atmosphere, large-scale disturbances of the climate system, an active direct participant in two dozen scientific expeditions, includin

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Zhai, Xiaoming, and Luke Sheldon. "On the North Atlantic Ocean Heat Content Change between 1955–70 and 1980–95." Journal of Climate 25, no. 10 (2012): 3619–28. http://dx.doi.org/10.1175/jcli-d-11-00187.1.

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Abstract The upper-ocean heat content of the North Atlantic has undergone significant changes over the last 50 years but the underlying physical mechanisms are not yet well understood. In the present study, the authors examine the North Atlantic ocean heat content change in the upper 700 m between the 1955–70 and 1980–95 periods. Consistent with previous studies, the large-scale pattern consists of warming of the tropics and subtropics and cooling of the subpolar ocean. However, this study finds that the most significant heat content change in the North Atlantic during these two time periods i

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Siqueira, Beatriz, Jonas Teixeira Nery, and Oliver Messeguer-Ruiz. "Análise dos Índices das Temperaturas Superficiais das Zonas Intertropicais dos Oceanos Pacífico e Atlântico associados às precipitações no Nordeste do Brasil." Revista Brasileira de Geografia Física 14, no. 2 (2021): 1081. http://dx.doi.org/10.26848/rbgf.v14.2.p1081-1093.

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O objetivo deste estudo foi analisar, através de índices climáticos, a variabilidade da precipitação na região Nordeste do Brasil. Para tanto foram utilizados dados em ponto de grade para gerar o índice de precipitação, bem como dados da National Oceanic Atmospheric Administration (NOAA) para gerar os índices de temperatura do oceano Pacífico (setor EN3.4) e do oceano Atlântico tropical norte e sul. O período de análise foi de 1970 a 2012. Com base nesses índices foram realizadas correlações lineares de Pearson, entre o oceano Pacífico e o Atlântico tropical norte e o oceano tropical sul, na c

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Tanhua, T., R. Steinfeldt, R. M. Key, et al. "Atlantic Ocean CARINA data: overview and salinity adjustments." Earth System Science Data Discussions 2, no. 1 (2009): 241–80. http://dx.doi.org/10.5194/essdd-2-241-2009.

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Abstract. Water column data of carbon and carbon-relevant hydrographic and hydrochemical parameters from 188 previously non-publicly available cruise data sets in the Arctic, Atlantic and Southern Ocean have been retrieved and merged into a new database: CARINA (CARbon IN the Atlantic). The data have gone through rigorous quality control procedures to assure the highest possible quality and consistency. The data for the pertinent parameters in the CARINA database were objectively examined in order to quantify systematic differences in the reported values, i.e. secondary quality control. System

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Watt, W. S., L. M. Larsen, and M. Watt. "Volcanic history of the Lower Tertiary plateau basalts in the Scoresby Sund region, East Greenland." Rapport Grønlands Geologiske Undersøgelse 128 (December 31, 1986): 147–56. http://dx.doi.org/10.34194/rapggu.v128.7931.

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The extensive plateau basalt lava pile in the Scoresby Sund region has a stratigraphic thickness of 3200 m and an overall average thickness of 1500 m. The pile thins inland from the Atlantic coast and laps onto basement gneisses and Jurassic sediments in the inner fjord region. The lavas are divisible into five formations which form two separate lava sequences. The lower sequence is best developed in the inner fjord region, while the upper sequence dominates the regions near the Atlantic coast. The sequences are interpreted as produced in two vo\canic episodes in connection with failed rifting

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Karstensen, J., B. Fiedler, F. Schütte, et al. "Open ocean dead-zone in the tropical North Atlantic Ocean." Biogeosciences Discussions 11, no. 12 (2014): 17391–411. http://dx.doi.org/10.5194/bgd-11-17391-2014.

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Abstract. The intermittent appearances of low oxygen environments are a particular thread for marine ecosystems. Here we present first observations of unexpected low (<2 μmol kg-1) oxygen environments in the open waters of the eastern tropical North Atlantic, a region where typically oxygen concentration does not fall below 40 μmol kg-1. The low oxygen zones are created just below the mixed-layer, in the euphotic zone of high productive cyclonic and anticyclonic-modewater eddies. A dynamic boundary is created from the large swirl-velocity against the weak background flow. Hydrographic prope

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Li, Laifang, M. Susan Lozier, and Martha W. Buckley. "An Investigation of the Ocean’s Role in Atlantic Multidecadal Variability." Journal of Climate 33, no. 8 (2020): 3019–35. http://dx.doi.org/10.1175/jcli-d-19-0236.1.

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AbstractA mechanistic understanding of the Atlantic multidecadal variability (AMV) is highly desirable since it will considerably aid regional and global climate predictions. Although ocean dynamics have long been invoked to explain the AMV, recent studies have cast doubt on its influence. Here we evaluate the necessity of ocean dynamics for the AMV using an observationally based idealized model that isolates the contribution of atmospheric forcing to the AMV. By demonstrating that this model underestimates the magnitude of the observed sea surface temperature variability in the extratropical

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Meccia, Virna L., Doroteaciro Iovino, and Alessio Bellucci. "North Atlantic gyre circulation in PRIMAVERA models." Climate Dynamics 56, no. 11-12 (2021): 4075–90. http://dx.doi.org/10.1007/s00382-021-05686-z.

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AbstractWe study the impact of horizontal resolution in setting the North Atlantic gyre circulation and representing the ocean–atmosphere interactions that modulate the low-frequency variability in the region. Simulations from five state-of-the-art climate models performed at standard and high-resolution as part of the High-Resolution Model Inter-comparison Project (HighResMIP) were analysed. In some models, the resolution is enhanced in the atmospheric and oceanic components whereas, in some other models, the resolution is increased only in the atmosphere. Enhancing the horizontal resolution

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Hu, Zeng-Zhen, and Bohua Huang. "The Predictive Skill and the Most Predictable Pattern in the Tropical Atlantic: The Effect of ENSO." Monthly Weather Review 135, no. 5 (2007): 1786–806. http://dx.doi.org/10.1175/mwr3393.1.

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Abstract This work investigates the predictive skill and most predictable pattern in the NCEP Climate Forecast System (CFS) in the tropical Atlantic Ocean. The skill is measured by the sea surface temperature (SST) anomaly correlation between the predictions and the corresponding analyses, and the most predictable patterns are isolated by an empirical orthogonal function analysis with a maximized signal-to-noise ratio. On average, for predictions with initial conditions (ICs) of all months, the predictability of SST is higher in the west than in the east. The highest skill is near the tropical

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Yasuhara, Moriaki, Thomas M. Cronin, Gene Hunt, and David A. Hodell. "Deep-sea ostracods from the South Atlantic sector of the Southern Ocean during the last 370,000 years." Journal of Paleontology 83, no. 6 (2009): 914–30. http://dx.doi.org/10.1666/08-149.1.

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We report changes of deep-sea ostracod fauna during the last 370,000 yr from the Ocean Drilling Program (ODP) Hole 704A in the South Atlantic sector of the Southern Ocean. The results show that faunal changes are coincident with glacial/interglacial-scale deep-water circulation changes, even though our dataset is relatively small and the waters are barren of ostracods until mid-MIS (Marine Isotope Stage) 5.KritheandPoseidonamicuswere dominant during the Holocene interglacial period and the latter part of MIS 5, when this site was under the influence of North Atlantic Deep Water (NADW). Convers

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Schuster, U., G. A. McKinley, N. Bates, et al. "Atlantic and Arctic sea-air CO<sub>2</sub> fluxes, 1990–2009." Biogeosciences Discussions 9, no. 8 (2012): 10669–724. http://dx.doi.org/10.5194/bgd-9-10669-2012.

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Abstract. The Atlantic and Arctic oceans are critical components of the global carbon cycle. Here we quantify the net sea-air CO2 flux, for the first time, across different methodologies for consistent time and space scales, for the Atlantic and Arctic basins. We present the long-term mean, seasonal cycle, interannual variability and trends in sea-air CO2 flux for the period 1990 to 2009, and assign an uncertainty to each. We use regional cuts from global observations and modelling products, specifically a pCO2-based CO2 flux climatology, flux estimates from the inversion of oceanic and atmosp

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Schuster, U., G. A. McKinley, N. Bates, et al. "An assessment of the Atlantic and Arctic sea–air CO<sub>2</sub> fluxes, 1990–2009." Biogeosciences 10, no. 1 (2013): 607–27. http://dx.doi.org/10.5194/bg-10-607-2013.

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Abstract. The Atlantic and Arctic Oceans are critical components of the global carbon cycle. Here we quantify the net sea–air CO2 flux, for the first time, across different methodologies for consistent time and space scales for the Atlantic and Arctic basins. We present the long-term mean, seasonal cycle, interannual variability and trends in sea–air CO2 flux for the period 1990 to 2009, and assign an uncertainty to each. We use regional cuts from global observations and modeling products, specifically a pCO2-based CO2 flux climatology, flux estimates from the inversion of oceanic and atmosphe

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Tanhua, T., R. Steinfeldt, R. M. Key, et al. "Atlantic Ocean CARINA data: overview and salinity adjustments." Earth System Science Data 2, no. 1 (2010): 17–34. http://dx.doi.org/10.5194/essd-2-17-2010.

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Abstract. Water column data of carbon and carbon-relevant hydrographic and hydrochemical parameters from 188 previously non-publicly available cruise data sets in the Arctic Mediterranean Seas, Atlantic and Southern Ocean have been retrieved and merged into a new database: CARINA (CARbon dioxide IN the Atlantic Ocean). The data have gone through rigorous quality control procedures to assure the highest possible quality and consistency. The data for the pertinent parameters in the CARINA database were objectively examined in order to quantify systematic differences in the reported values, i.e.

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Lambert, Erwin, Tor Eldevik, and Michael A. Spall. "On the Dynamics and Water Mass Transformation of a Boundary Current Connecting Alpha and Beta Oceans." Journal of Physical Oceanography 48, no. 10 (2018): 2457–75. http://dx.doi.org/10.1175/jpo-d-17-0186.1.

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AbstractA subpolar marginal sea, like the Nordic seas, is a transition zone between the temperature-stratified subtropics (the alpha ocean) and the salinity-stratified polar regions (the beta ocean). An inflow of Atlantic Water circulates these seas as a boundary current that is cooled and freshened downstream, eventually to outflow as Deep and Polar Water. Stratification in the boundary region is dominated by a thermocline over the continental slope and a halocline over the continental shelves, separating Atlantic Water from Deep and Polar Water, respectively. A conceptual model is introduced

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Sonnewald, M., J. J. M. Hirschi, R. Marsh, E. L. McDonagh, and B. A. King. "Atlantic meridional ocean heat transport at 26° N: impact on subtropical ocean heat content variability." Ocean Science 9, no. 6 (2013): 1057–69. http://dx.doi.org/10.5194/os-9-1057-2013.

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Abstract. Local climate is significantly affected by changes in the oceanic heat content on a range of timescales. This variability is driven by heat fluxes from both the atmosphere and the ocean. In the Atlantic the meridional overturning circulation is the main contributor to the oceanic meridional heat transport for latitudes south of about 50° N. The RAPID project has been successfully monitoring the Atlantic meridional overturning at 26° N since 2004. This study demonstrates how these data can be used to estimate the variability of the basin-wide ocean heat content in the upper 800 m betw

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Li, Bolun, and Zekai Ni. "Regions of the southern Atlantic Ocean: A study on the sea surface temperature and sea surface salinity of the southern Atlantic Ocean region." Applied and Computational Engineering 85, no. 1 (2024): 113–19. http://dx.doi.org/10.54254/2755-2721/85/20240956.

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Followed by the fast advancement of computer science and technology, studies involving massive datasets, especially environmental sciences, have been more accessible for researchers. Yet, with the completion of high-resolution data about the southern Atlantic Ocean region, there has not been sufficient academic research focusing on this specific area. In this regard, this paper investigates the connection between the Sea Surface Temperature (SST) and Sea Surface Salinity (SSS). The researchers chose South Atlantic as the research subject, and based on the visualization of the datasets from yea

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Zhao, Xia, and Jianping Li. "Winter-to-Winter Recurrence of Sea Surface Temperature Anomalies in the Northern Hemisphere." Journal of Climate 23, no. 14 (2010): 3835–54. http://dx.doi.org/10.1175/2009jcli2583.1.

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Abstract The spatiotemporal characteristics of the winter-to-winter recurrence (WWR) of sea surface temperature anomalies (SSTA) in the Northern Hemisphere (NH) are comprehensively studied through lag correlation analysis. On this basis the relationships between the SSTA WWR and the WWR of the atmospheric circulation anomalies, El Niño–Southern Oscillation (ENSO), and SSTA interdecadal variability are also investigated. Results show that the SSTA WWR occurs over most parts of the North Pacific and Atlantic Oceans, but the spatiotemporal distributions of the SSTA WWR are distinctly different in

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Siqueira, Beatriz, Jonas Teixeira Nery, and Ana Cláudia Carfan. "Relationship between the rainfall index for Southern Brazil and the indexes of the Tropical Pacific and the Tropical Atlantic Oceans." Acta Scientiarum. Technology 45 (September 27, 2023): e58368. http://dx.doi.org/10.4025/actascitechnol.v45i1.58368.

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The proposed study verified the possible influences of sea surface temperature (SST) anomalies in the equatorial Pacific and the tropical Atlantic on the rainfall in the southern region of Brazil. The rainfall stations used have monthly data for the period from 1977 to 2015 and are distributed throughout that region. Monthly TSM anomalies in the Niño 3.4 and Niño 1 + 2 areas, the Southern Oscillation Index and the Monthly Tropical South Atlantic Temperature Index were also used, from the database provided by the Climate Prediction Centre. The results show the association of precipitation in th

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Yeager, Stephen, Alicia Karspeck, Gokhan Danabasoglu, Joe Tribbia, and Haiyan Teng. "A Decadal Prediction Case Study: Late Twentieth-Century North Atlantic Ocean Heat Content." Journal of Climate 25, no. 15 (2012): 5173–89. http://dx.doi.org/10.1175/jcli-d-11-00595.1.

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Abstract An ensemble of initialized decadal prediction (DP) experiments using the Community Climate System Model, version 4 (CCSM4) shows considerable skill at forecasting changes in North Atlantic upper-ocean heat content and surface temperature up to a decade in advance. Coupled model ensembles were integrated forward from each of 10 different start dates spanning from 1961 to 2006 with ocean and sea ice initial conditions obtained from a forced historical experiment, a Coordinated Ocean-Ice Reference Experiment with Interannual forcing (CORE-IA), which exhibits good correspondence with late

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Scoccimarro, Enrico, Alessio Bellucci, Andrea Storto, Silvio Gualdi, Simona Masina, and Antonio Navarra. "Remote subsurface ocean temperature as a predictor of Atlantic hurricane activity." Proceedings of the National Academy of Sciences 115, no. 45 (2018): 11460–64. http://dx.doi.org/10.1073/pnas.1810755115.

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Predicting North Atlantic hurricane activity months in advance is of great potential societal significance. The ocean temperature, both in terms of North Atlantic/tropical averages and upper ocean heat content, is demonstrated to be a significant predictor. To investigate the relationship between the thermal state of the Atlantic Ocean and the tropical cyclone (TC) activity in terms of accumulated cyclone energy (ACE), we use observed 1980–2015 TC records and a 1/4° resolution global ocean reanalysis. This paper highlights the nonlocal effect associated with eastern Atlantic Ocean temperature,

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Fu, Xuewu, Nicolas Marusczak, Lars-Eric Heimbürger, et al. "Atmospheric mercury speciation dynamics at the high-altitude Pic du Midi Observatory, southern France." Atmospheric Chemistry and Physics 16, no. 9 (2016): 5623–39. http://dx.doi.org/10.5194/acp-16-5623-2016.

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Abstract. Continuous measurements of atmospheric gaseous elemental mercury (GEM), particulate bound mercury (PBM) and gaseous oxidized mercury (GOM) at the high-altitude Pic du Midi Observatory (PDM Observatory, 2877 m a.s.l.) in southern France were made from November 2011 to November 2012. The mean GEM, PBM and GOM concentrations were 1.86 ng m−3, 14 pg m−3 and 27 pg m−3, respectively and we observed 44 high PBM (peak PBM values of 33–98 pg m−3) and 61 high GOM (peak GOM values of 91–295 pg m−3) events. The high PBM events occurred mainly in cold seasons (winter and spring) whereas high GOM

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Kolomijeca, Anna, Lukas Marx, Sarah Reynolds, Thierry Cariou, Edward Mawji, and Cedric Boulart. "An update on dissolved methane distribution in the subtropical North Atlantic Ocean." Ocean Science 18, no. 5 (2022): 1377–88. http://dx.doi.org/10.5194/os-18-1377-2022.

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Abstract. Methane (CH4) is a potent greenhouse gas and plays a significant role in recent increasing global temperatures. The oceans are a natural source of methane contributing to atmospheric methane concentrations, yet our understanding of the oceanic methane cycle is poorly constrained. Accumulating evidence indicates that a significant part of oceanic CH4 is produced in oxygenated surface waters as a by-product of phytoplanktonic activity. This study focused on the subtropical North Atlantic Ocean (26∘ N, 80′ W and 26∘ N, 18′ W) where the distribution of dissolved CH4 concentrations and as

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Wills, Robert C. J., Kyle C. Armour, David S. Battisti, and Dennis L. Hartmann. "Ocean–Atmosphere Dynamical Coupling Fundamental to the Atlantic Multidecadal Oscillation." Journal of Climate 32, no. 1 (2018): 251–72. http://dx.doi.org/10.1175/jcli-d-18-0269.1.

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Abstract The North Atlantic has shown large multidecadal temperature shifts during the twentieth century. There is ongoing debate about whether this variability arises primarily through the influence of atmospheric internal variability, through changes in ocean circulation, or as a response to anthropogenic forcing. This study isolates the mechanisms driving Atlantic sea surface temperature variability on multidecadal time scales by using low-frequency component analysis (LFCA) to separate the influences of high-frequency variability, multidecadal variability, and long-term global warming. Thi

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Morozov, Eugene. "Research in the Atlantic Sector of the Southern Ocean and Propagation of Antarctic Bottom Water in the Atlantic." Water 15, no. 13 (2023): 2348. http://dx.doi.org/10.3390/w15132348.

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This article belongs to the Special Issue “Physical and Biological Properties of Waters in the Region of the Antarctic Peninsula and Adjacent Basins of the South Atlantic,”: a Special Issue that is dedicated to recent research in the Atlantic sector of the Southern Ocean and Antarctica Peninsula region [...]

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Kundu, Shantanu, Hye-Eun Kang, Yunji Go, et al. "Mitogenomic Architecture of Atlantic Emperor Lethrinus atlanticus (Actinopterygii: Spariformes): Insights into the Lineage Diversification in Atlantic Ocean." International Journal of Molecular Sciences 25, no. 19 (2024): 10700. http://dx.doi.org/10.3390/ijms251910700.

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The evolutionary history of emperors, particularly in the Atlantic and Indo-West Pacific Oceans, remains largely unmapped. This study explores the maternal lineage evolution of Lethrinids by examining the complete mitogenome of Lethrinus atlanticus, which is endemic to the Eastern Atlantic Ocean. Utilizing advanced next-generation sequencing, we found that the mitogenome spans 16,789 base pairs and encompasses 37 genes, including 13 protein-coding genes (PCGs), two ribosomal RNAs, 22 transfer RNAs, and an AT-rich control region (CR). Our analysis indicates a preference for AT base pairs in the

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