Article
Oceanography
Po-Chun Hsu, Luca Centurioni, Huan-Jie Shao, Quanan Zheng, Ching-Yuan Lu, Tai-Wen Hsu, Ruo-Shan Tseng
Summary: Research on ocean currents in the southern East China Sea has revealed complex flow structures and seasonal water mass exchange cycles. Data from coastal radars in northern Taiwan, drifters, and satellite observations have provided detailed information on surface currents, resolving disputes over the surface currents in this area.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Mingxian Guo, Peng Xiu, Xiaogang Xing
Summary: This study reveals the complex role of submesoscale dynamics, particularly frontal dynamics, in shaping the distribution of phytoplankton in the South Indian Ocean. Frontal dynamics play a crucial role in injecting nutrients and enhancing phytoplankton growth, especially diatoms.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Environmental Sciences
Dae-Won Kim, So-Hyun Kim, Young-Heon Jo
Summary: Long-term sea surface salinity in the East China Sea was estimated using machine learning based on OC-CCI data. The study revealed the distribution of Changjiang diluted water fronts and their correlation with chlorophyll-a concentration, sea surface density, and nitrogen concentration. The influence of Changjiang diluted water on sea level anomaly was also detected. This research provides valuable insights on the impact of Changjiang diluted water on the East China Sea marine environment.
Article
Oceanography
Ajitha Cyriac, Helen E. Phillips, Nathaniel L. Bindoff, Kurt Polzin
Summary: This study presents novel observational estimates of turbulent dissipation and mixing in a standing meander in the Southern Ocean, indicating significant spatial and temporal variability of turbulent mixing influenced by factors such as the Subantarctic Front and mesoscale eddies.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Mechanics
Ryosuke Kurashina, Pavel Berloff, Igor Shevchenko
Summary: This study examines the influence of flow nonlinearity in western boundary layers on wind-driven ocean gyres. Nonlinear effects are found to play a crucial role in shaping the circulation patterns, particularly in balancing potential vorticity between gyres downstream. Furthermore, Lagrangian particle analysis reveals inter-gyre exchange mechanisms that weaken the eastward jet extension.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
R. Cloete, J. C. Loock, N. R. van Horsten, J-L Menzel Barraqueta, S. Fietz, T. N. Mtshali, H. Planquette, M. I. Garcia-Ibanez, A. N. Roychoudhury
Summary: The first winter measurements of dissolved zinc (dZn) and particulate zinc (pZn) in the Indian Sector of the Southern Ocean showed increased dZn and decreased pZn at higher latitudes, indicating reduced biological uptake and preferential dZn resupply due to deep winter mixing. Additionally, the study revealed potential hydrothermal activity and transport of continental sediment as sources of zinc, and demonstrated a longer remineralisation length scale for zinc compared to phosphorus.
Article
Environmental Sciences
Chelsea N. Lopez, Dennis A. Hansell
Summary: This study reveals two mechanisms that promote deep particle export in the Southern Ocean: deep frontal mixing and melting of sea ice. By examining data collected in 2008 and 2017, the authors conclude that the sources of iron for export differ in years with anomalously low and high ice melt, respectively.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Ecology
Nicolas Metzl, Claire Lo Monaco, Coraline Leseurre, Celine Ridame, Jonathan Fin, Claude Mignon, Marion Gehlen, Thi Tuyet Trang Chau
Summary: This study describes new sea surface CO2 observations in the south-western Indian Ocean, highlighting a strong bloom event that occurred in January 2020. The observations indicate a biologically driven process and show significant carbon uptake in the region. The paper emphasizes the importance of understanding the origin and impact of these sporadic blooms on ocean carbon uptake.
Article
Meteorology & Atmospheric Sciences
Morio Nakayama, Hisashi Nakamura, Fumiaki Ogawa
Summary: The study indicates that the midlatitude oceanic frontal zone enhances and anchors the variability of the baroclinic annular mode (BAM) by supplying sensible heat and moisture from the ocean, although the BAM is primarily a manifestation of atmospheric internal dynamics. The BAM modulates momentum flux associated with transient disturbances to induce a modest but robust meridional shift of the polar-front jet, suggesting that it can help maintain the stability of the southern annular mode. The quasi-periodic behavior of the BAM likely reflects the internal dynamics involving atmospheric disturbances on both subweekly and longer time scales.
JOURNAL OF CLIMATE
(2021)
Article
Oceanography
Yu Gao, Igor Kamenkovich, Natalie Perlin, Benjamin Kirtman
Summary: This study analyzes the role of mesoscale heat advection in a mixed layer heat budget. It shows that oceanic currents create mesoscale anomalies in sea surface temperature through heat advection. The atmospheric turbulent heat fluxes, on the other hand, dampen these temperature anomalies.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Maciej K. Manko, Malgorzata Merchel, Slawomir Kwasniewski, Agata Weydmann-Zwolicka
Summary: Oceanic fronts act as boundaries between different water masses and are highly productive regions in the ocean. This study focused on passive fronts in the European Arctic and found that they maintain distinct zooplankton communities, with community shifts occurring when the fronts relocate.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Kechen Zhu, Eric P. Achterberg, Nicholas R. Bates, Loes J. A. Gerringa, Rob Middag, Mark J. Hopwood, Martha Gledhill
Summary: An insufficient supply of iron limits phytoplankton growth in the ocean. We calculated the solubility of iron at equilibrium under ambient conditions and compared it to measured dissolved iron in the Atlantic and Pacific Oceans. Our results showed that the solubility of iron was higher than the observed dissolved iron at different depths. We found that changes in solubility of iron, driven by changes in ambient pH and temperature, underlie the vertical distributions of dissolved iron.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Environmental Sciences
Chelsea Nicole Lopez, Dennis Arthur Hansell
Summary: This study provides evidence of deep particle export and enhanced dissolved organic carbon concentrations beneath the Pacific's Subarctic Front and Northern Subtropical Front. These phenomena are controlled by latitude-specific biogeochemical and hydrographic conditions.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Folco Giomi, Alberto Barausse, Alexandra Steckbauer, Daniele Daffonchio, Carlos M. Duarte, Marco Fusi
Summary: The decline of dissolved oxygen in the oceans could have negative impacts on marine life and biogeochemical cycles. Current models that focus on large-scale mean values may lead to inaccurate predictions. Short-term and small-scale oxygen fluctuations strongly influence marine ecosystems, but they are often neglected in large-scale modelling. Understanding the dynamics of dissolved oxygen at small relevant scales is crucial for accurate projection of the impacts of ocean and coastal deoxygenation on marine biogeochemical processes and communities.
Article
Environmental Sciences
R. M. Wright, C. Le Quere, N. Mayot, A. Olsen, D. C. E. Bakker
Summary: The Southern Ocean is crucial for carbon uptake, transport, and storage by the global oceans. It is the largest CO2 sink but has low storage of anthropogenic carbon due to the unique combination of upwelling of deep waters and northward transport of surface carbon driven by high winds. Through modeling and observations, we isolate the direct effect of increasing anthropogenic CO2 from the indirect effect of climate variability and change on carbon reorganization in the Southern Ocean. Climate variability and change have a significant impact on carbon storage in the Southern Ocean, comparable to the effect of anthropogenic CO2.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Environmental Sciences
Holly Wallington, Katharine Hendry, Rupert Perkins, Marian Yallop, Sandra Arndt
Summary: Riverine dissolved silicon (DSi) and biogenic silica (BSi) in estuaries are influenced by various biotic and abiotic processes. The benthic diatom-dominated biofilm system plays a crucial role in controlling silicon transport in alluvial estuaries. The Severn Estuary in the UK was studied to enhance our understanding of silicon transport in benthic-dominated systems. The study found that river and tidal hydrodynamics drove changes in DSi concentrations, and that benthic biofilms on intertidal mudflats contributed to high BSi content in the estuary.
Article
Geochemistry & Geophysics
James Kershaw, Joseph A. Stewart, Ivo Strawson, Maria Luiza de Carvalho Ferreira, Laura F. Robinson, Katharine R. Hendry, Ana Samperiz, Andrea Burke, James W. B. Rae, Rusty D. Day, Peter J. Etnoyer, Branwen Williams, Vreni Haussermann
Summary: Based on the study of modern Stylasteridae corals, it is found that [Ba]SW and sample mineralogy are the main factors influencing coral Ba/Ca ratios, while seawater temperature has a weak influence. Paired Sr/Ca measurements suggest that the variability in scleractinian Ba/Ca may be related to varying degrees of Rayleigh fractionation during calcification. Stylasteridae corals have the potential to be an important new archive for paleoceanographic studies.
Article
Environmental Sciences
Johan C. Faust, Philippa Ascough, Robert G. Hilton, Mark A. Stevenson, Katharine R. Hendry, Christian Maerz
Summary: The association of organic carbon with iron minerals (Fe-R) is crucial for its long-term storage and burial efficiency in marine sediments. However, uncertainties exist regarding the sources, age, lability, and composition of this organic matter. This study uses radiocarbon and stable isotopes to investigate the source and age of Fe-R-associated organic carbon in Arctic marine sediments. The results suggest that fresh and marine organic matter rapidly binds with Fe-R, protecting and stabilizing labile organic matter and highlighting the potential of the organic carbon-iron association as an efficient carbon burial mechanism.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
R. M. Wright, C. Le Quere, N. Mayot, A. Olsen, D. C. E. Bakker
Summary: The Southern Ocean is crucial for carbon uptake, transport, and storage by the global oceans. It is the largest CO2 sink but has low storage of anthropogenic carbon due to the unique combination of upwelling of deep waters and northward transport of surface carbon driven by high winds. Through modeling and observations, we isolate the direct effect of increasing anthropogenic CO2 from the indirect effect of climate variability and change on carbon reorganization in the Southern Ocean. Climate variability and change have a significant impact on carbon storage in the Southern Ocean, comparable to the effect of anthropogenic CO2.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Correction
Chemistry, Medicinal
Catherine R. Back, Henry L. Stennett, Sam E. Williams, Luoyi Wang, Jorge Ojeda Gomez, Omar M. Abdulle, Thomas Duffy, Christopher Neal, Judith Mantell, Mark A. Jepson, Katharine R. Hendry, David Powell, James E. M. Stach, Angela E. Essex-Lopresti, Christine L. Willis, Paul Curnow, Paul R. Race
Article
Meteorology & Atmospheric Sciences
Li-Qing Jiang, John Dunne, Brendan R. Carter, Jerry F. Tjiputra, Jens Terhaar, Jonathan D. Sharp, Are Olsen, Simone Alin, Dorothee C. E. Bakker, Richard A. Feely, Jean-Pierre Gattuso, Patrick Hogan, Tatiana Ilyina, Nico Lange, Siv K. Lauvset, Ernie R. Lewis, Tomas Lovato, Julien Palmieri, Yeray Santana-Falcon, Joerg Schwinger, Roland Seferian, Gary Strand, Neil Swart, Toste Tanhua, Hiroyuki Tsujino, Rik Wanninkhof, Michio Watanabe, Akitomo Yamamoto, Tilo Ziehn
Summary: This study presents a new model-data fusion product covering 10 global surface ocean acidification (OA) indicators based on 14 Earth System Models (ESMs) and three recent observational ocean carbon data products. The evolution of these indicators from preindustrial conditions to future scenarios is provided, offering a state-of-the-art research and management tool for understanding the combined stressors of global climate change and ocean acidification.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2023)
Article
Environmental Sciences
J. E. Hatton, H. C. Ng, L. Meire, E. M. S. Woodward, M. J. Leng, C. D. Coath, A. Stuart-Lee, T. Wang, A. L. Annett, K. R. Hendry
Summary: Glaciers and ice sheets are rapidly warming due to climate change, and research suggests that glacial meltwaters provide important nutrients to downstream ecosystems. However, the fate of these nutrients in fjord environments is still uncertain. A study in southwest Greenland used concentration data and isotopic compositions to investigate silicon cycling in two contrasting fjords. The results suggest that glacially derived amorphous silica may play a role in modifying coastal waters within fjords.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Environmental Sciences
Jessie Gardner, Victoria L. L. Peck, Dorothee C. E. Bakker, Geraint A. A. Tarling, Clara Manno
Summary: Pteropods in the Southern Ocean play important roles in biogeochemical cycling and epipelagic food webs. However, their vulnerability to climate change, specifically ocean acidification, is due to their aragonite shells. The understanding of pteropod responses to environmental change is limited by uncertainties regarding their life cycles and population dynamics. This study investigates the diversity of shelled pteropods in the north-eastern Scotia Sea and examines the life history and population structures of the dominant species Limacina rangii and Limacina retroversa. The findings suggest that L. rangii and L. retroversa have different life history strategies and vulnerabilities to a changing ocean, which may have cascading effects on Antarctic ecosystems and carbon cycling.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Nico Lange, Toste Tanhua, Benjamin Pfeil, Hermann W. Bange, Siv K. Lauvset, Marilaure Gregoire, Dorothee C. E. Bakker, Steve D. Jones, Bjoern Fiedler, Kevin M. O'Brien, Arne Koertzinger
Summary: Ocean data synthesis products have the potential to facilitate the use of biogeochemical ocean data and comply with FAIR data principles. These products are key outputs from the Global Ocean Observation System, providing a foundation for climate and environmental information. An evaluation framework is proposed to assess the maturity of biogeochemical data synthesis products, using a criteria catalog and readiness levels. The assessment is applied to existing data products, highlighting the need for comprehensive data and recommending the use of the framework in future development.
FRONTIERS IN MARINE SCIENCE
(2023)
Review
Environmental Sciences
Nicolas Gruber, Dorothee C. E. Bakker, Tim DeVries, Luke Gregor, Judith Hauck, Peter Landschuetzer, Galen A. McKinley, Jens Daniel Mueller
Summary: The ocean has absorbed a significant amount of anthropogenic CO2 emissions, with rates increasing over the years but showing variability. The ocean carbon sink stagnated in the 1990s but strengthened again after 2000, with the Southern Ocean experiencing the most significant changes. Understanding the variability of the ocean carbon sink is crucial for policy making and future projections.
NATURE REVIEWS EARTH & ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Michael J. Whitehouse, Katharine R. Hendry, Geraint A. Tarling, Sally E. Thorpe, Petra Ten Hoopen
Summary: We have created a database of macronutrient data obtained from 20 oceanographic cruises conducted primarily around South Georgia and the Scotia Sea. The database includes measurements of nutrients such as silicate, phosphate, nitrate, ammonium, and nitrite, along with temperature and salinity data. This comprehensive dataset provides valuable information for studying the ecology of the Southern Ocean and its surrounding regions.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Meteorology & Atmospheric Sciences
Elise S. Droste, Mario Hoppema, Melchor Gonzalez-Davila, Juana Magdalena Santana-Casiano, Bastien Y. Queste, Giorgio Dall'Olmo, Hugh J. Venables, Gerd Rohardt, Sharyn Ossebaar, Daniel Schuller, Sunke Trace-Kleeberg, Dorothee C. E. Bakker
Summary: Tides significantly affect marine carbonate chemistry in polar coastal areas and can lead to variations in CO2 flux in polynyas. Neglecting the impact of tides may result in overestimation or underestimation of CO2 uptake in polynyas, making it important to consider tidal currents in sampling strategies and analyses.
Article
Meteorology & Atmospheric Sciences
Michael P. Hemming, Jan Kaiser, Jacqueline Boutin, Liliane Merlivat, Karen J. Heywood, Dorothee C. E. Bakker, Gareth A. Lee, Marcos Cobas Garcia, David Antoine, Kiminori Shitashima
Summary: Although the Mediterranean Sea covers only 0.8% of the global oceanic surface, it is considered a disproportionately large sink for anthropogenic carbon. A recent study conducted a glider mission in the northwestern Mediterranean Sea and obtained valuable data regarding the carbon dynamics and the start of a phytoplankton bloom.
Article
Environmental Sciences
Yingxu Wu, Dorothee C. E. Bakker, Eric P. Achterberg, Amavi N. Silva, Daisy D. Pickup, Xiang Li, Sue Hartman, David Stappard, Di Qi, Toby Tyrrell
Summary: The comparison of carbon dioxide and oxygen concentrations in ocean surface waters relative to saturation can help identify erroneous data collected by autonomous ocean platforms.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Pierre Friedlingstein, Matthew W. Jones, Michael O'Sullivan, Robbie M. Andrew, Dorothee C. E. Bakker, Judith Hauck, Corinne Le Quere, Glen P. Peters, Wouter Peters, Julia Pongratz, Stephen Sitch, Josep G. Canadell, Philippe Ciais, Rob B. Jackson, Simone R. Alin, Peter Anthoni, Nicholas R. Bates, Meike Becker, Nicolas Bellouin, Laurent Bopp, Thi Tuyet Trang Chau, Frederic Chevallier, Louise P. Chini, Margot Cronin, Kim I. Currie, Bertrand Decharme, Laique M. Djeutchouang, Xinyu Dou, Wiley Evans, Richard A. Feely, Liang Feng, Thomas Gasser, Dennis Gilfillan, Thanos Gkritzalis, Giacomo Grassi, Luke Gregor, Nicolas Gruber, Ozgur Gurses, Ian Harris, Richard A. Houghton, George C. Hurtt, Yosuke Iida, Tatiana Ilyina, Ingrid T. Luijkx, Atul Jain, Steve D. Jones, Etsushi Kato, Daniel Kennedy, Kees Klein Goldewijk, Jurgen Knauer, Jan Ivar Korsbakken, Arne Kortzinger, Peter Landschutzer, Siv K. Lauvset, Nathalie Lefevre, Sebastian Lienert, Junjie Liu, Gregg Marland, Patrick C. McGuire, Joe R. Melton, David R. Munro, Julia E. M. S. Nabel, Shin-Ichiro Nakaoka, Yosuke Niwa, Tsuneo Ono, Denis Pierrot, Benjamin Poulter, Gregor Rehder, Laure Resplandy, Eddy Robertson, Christian Rodenbeck, Thais M. Rosan, Jorg Schwinger, Clemens Schwingshackl, Roland Seferian, Adrienne J. Sutton, Colm Sweeney, Toste Tanhua, Pieter P. Tans, Hanqin Tian, Bronte Tilbrook, Francesco Tubiello, Guido R. van der Werf, Nicolas Vuichard, Chisato Wada, Rik Wanninkhof, Andrew J. Watson, David Willis, Andrew J. Wiltshire, Wenping Yuan, Chao Yue, Xu Yue, Sonke Zaehle, Jiye Zeng
Summary: Accurate assessment of anthropogenic CO2 emissions and their redistribution among different components is critical for understanding the global carbon cycle. This study presents datasets and methodologies to quantify the major components of the global carbon budget. The results show changes in fossil fuel and land-use change emissions, as well as atmospheric CO2 concentration, ocean CO2 sink, and terrestrial CO2 sink.
EARTH SYSTEM SCIENCE DATA
(2022)
