Article
Geosciences, Multidisciplinary
Johan M. Edholm, Sebastiaan Swart, Marcel D. Plessis, Sarah-Anne Nicholson
Summary: This study explores the impact of atmospheric rivers (ARs) on surface ocean buoyancy using high-resolution surface observations. It finds that when ARs combine with storms, precipitation is significantly enhanced, and the accumulated precipitation from ARs provides a buoyancy gain to the surface ocean equivalent to surface heat fluxes. The study also highlights that ARs play an important role in summer precipitation over the subpolar Southern Ocean and can alter the upper-ocean buoyancy budget across different timescales.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
K. E. Altieri, K. A. M. Spence, S. Smith
Summary: Oceanic ammonia emissions are the largest natural source of ammonia globally, with the air-sea flux being consistently from the atmosphere into the ocean even in regions with high surface ocean ammonium concentrations. Temperature is the dominant control on the air-sea ammonia flux, but seasonality in the Southern Ocean nitrogen cycle may influence the direction of the flux.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Oceanography
Neill Mackay, Andrew Watson
Summary: In the Southern Ocean south of the Polar Front, utilizing summertime observations to reconstruct wintertime pCO2surf greatly improved coverage and enhanced accuracy of flux estimates. The addition of pseudo observations initially increased outgassing, which gradually decreased over time.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Geosciences, Multidisciplinary
A. J. Sutton, N. L. Williams, B. Tilbrook
Summary: This study utilized an Uncrewed Surface Vehicle to make direct measurements of air-sea CO2, wind speed, and surface ocean properties, providing hourly CO2 flux estimates during the first autonomous circumnavigation of Antarctica in 2019. The research found that different wind speed products and sampling frequencies had the largest impact on CO2 flux estimates, with biases ranging from -4% to +20%. These biases, along with poorly constrained interannual variability, could explain discrepancies between different approaches to estimating Southern Ocean CO2 uptake.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Simon A. Josey, Jeremy P. Grist, Jennifer V. Mecking, Ben I. Moat, Eric Schulz
Summary: This article discusses progress in understanding Southern Ocean heat exchange and wind forcing, and presents new results. It introduces a metric of the zonal asymmetry between surface ocean heat gain in the Atlantic/Indian sector and heat loss in the Pacific sector. The article also explores the potential for surface flux buoys to provide observation-based data for the asymmetry metric.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Meteorology & Atmospheric Sciences
Yanzhou Wei
Summary: The Southern Ocean is the main region of global ocean heat gain, with a concentration in the Antarctic Circumpolar Current (ACC) region. Ocean circulation plays a crucial role in determining the temperature response pattern to global warming.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2023)
Article
Oceanography
Manami Tozawa, Daiki Nomura, Shin-ichiro Nakaoka, Masaaki Kiuchi, Kaihe Yamazaki, Daisuke Hirano, Shigeru Aoki, Hiroko Sasaki, Hiroto Murase
Summary: To assess the inorganic carbon cycle in the eastern Indian sector of the Southern Ocean, various parameters were measured during the KY18 survey. It was found that the ocean in this region acts as a weak CO2 sink, with the CO2 flux being influenced by biological activity and temperature. The study also showed an increase in oceanic and atmospheric CO2 concentrations over time, primarily driven by the rise in atmospheric CO2 and changes in water-mass distribution.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Kyungmin Kwak, Hajoon Song, John Marshall, Hyodae Seo, Dennis J. McGillicuddy
Summary: The Southern Ocean is a crucial region for the absorption of carbon dioxide, with strong surface currents and atmospheric interactions impacting air-sea carbon exchange, leading to a reduction in winter CO2 outgassing.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Environmental Sciences
Ying-Cui Wu, Xu-Xu Gao, Hong-Hai Zhang, Yong-Zheng Liu, Jian Wang, Feng Xu, Gui-Ling Zhang, Zhao-Hui Chen
Summary: Field investigations in the Northwest Pacific Ocean were conducted to determine the distributions, sources, and environmental effects of marine and atmospheric non-methane hydrocarbons (NMHCs). Deck incubation experiments were also carried out to investigate the effects of atmospheric aerosol deposition on NMHCs production. It was found that isoprene production and release in the Northwest Pacific Ocean were influenced by ocean current movements and atmospheric deposition, while the other six NMHCs showed no significant responses to atmospheric aerosol deposition in the incubation experiments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Elizabeth H. Shadwick, Cathryn A. Wynn-Edwards, Richard J. Matear, Peter Jansen, Eric Schulz, Adrienne J. Sutton
Summary: The Subantarctic Zone in the Southern Ocean plays a crucial role in air-sea CO2 exchange and the storage of anthropogenic CO2. This study uses long-term observations to reveal that this region is a net sink for atmospheric CO2 and that the ocean pCO(2) may be increasing slightly faster than the atmosphere, indicating the contribution of both oceanic and anthropogenic forcings.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Jie Ni, Shan-Shan Liu, Xiao-Ping Lang, Zhen He, Gui-Peng Yang
Summary: This three-year study comprehensively characterized the concentrations of SF6 in the atmosphere and surface seawater, and found that polluted air masses from eastern Asian countries were the reason for the increase in SF6 concentrations in the study region. The ocean, as a significant sink of atmospheric SF6, has the potential to reduce its global abundance and environmental impacts.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Huiying Sun, Kaiwen Zheng, Jing Yu, Hao Zheng
Summary: The Southern Indian Ocean plays a crucial role in the global carbon cycle as a major reservoir for rapid carbon exchange with the atmosphere. The impact of windseas on the air-sea CO2 exchange in this region has been studied, revealing an increasing CO2 absorption capacity over the past 20 years, particularly during the summer season.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Oceanography
Jade Sauve, Alison R. Gray, Channing J. Prend, Seth M. Bushinsky, Stephen C. Riser
Summary: Despite its global importance, our understanding of carbon fluxes in the high-latitude Southern Ocean is limited due to lack of observations. This study uses float data and atmospheric reanalysis to construct a monthly climatology of dissolved inorganic carbon (DIC) in the Southern Ocean. The study reveals the processes driving DIC fluxes in different zones of the Southern Ocean and highlights the role of wind-driven transport in carbon outgassing.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Geochemistry & Geophysics
Kunsheng Xiang, Xiaobin Yin, Shuguo Xing, Fanping Kong, Yan Li, Shuyan Lang, Zhiyi Gao
Summary: The study validated the accuracy of wind speed and wave data from the China-France Oceanography Satellite during global tropical cyclones, showing that errors in wind speed and significant wave height increase with cyclone intensity.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Green & Sustainable Science & Technology
Gagan Mandal, Jia-Yuh Yu, Shih-Yu Lee
Summary: This study investigates the evolution of Southern Ocean dynamics during the last deglaciation and highlights the roles of Antarctic sea ice feedback and changes in orbital and meltwater forcings. The results show that wind stress primarily drove the Southern Ocean upwelling, and the melting of Antarctic sea ice influenced surface buoyancy flux. The experiments also demonstrate the dominant role of Northern Hemisphere meltwater discharge in the Meridional Overturning Circulation.
Article
Environmental Sciences
Samuel J. Billheimer, Lynne D. Talley, Todd R. Martz
Summary: Seasonal oxygen structure and utilization in the Sargasso Sea were investigated using profiling floats with oxygen sensors. Oxygen decreased in spring-summer, creating a shallow oxygen maximum layer, while increasing in autumn-winter. Organic matter remineralization was double in May-August compared to August-November. The Sargasso Sea is a net carbon producer with important vertical diffusive flux and lateral advection contributing to the complex vertical oxygen structure.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Multidisciplinary Sciences
Alyse A. . Larkin, Catherine A. Garcia, Nathan Garcia, Melissa L. Brock, Jenna A. Lee, Lucas J. Ustick, Leticia Barbero, Brendan R. Carter, Rolf E. Sonnerup, Lynne D. Talley, Glen A. Tarran, Denis L. Volkov, Adam C. Martiny
Summary: This study presents 971 globally distributed surface ocean metagenomes collected at high spatio-temporal resolution, generating a large amount of data and samples. These metagenomic libraries were collected as part of the Global Ocean Ship-based Hydrographic Investigations Program's biological initiative, aiming to directly quantify climate change impacts on ocean environments.
Article
Oceanography
He Wang, Julie L. Mcclean, Lynne D. Talley
Summary: The Arabian Sea is influenced by the Indian monsoon, featuring unique characteristics such as a seasonally reversing surface circulation and the Great Whirl. Nonlinear eddies play a significant role in the vorticity balance of the Great Whirl, while Sverdrup dynamics and annual Rossby waves dominate in the open ocean.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Oceanography
Ratnaksha Lele, Sarah G. Purkey, Jonathan D. Nash, Jennifer A. MacKinnon, Andreas M. Thurnherr, Caitlin B. Whalen, Sabine Mecking, Gunnar Voet, Lynne D. Talley
Summary: The abyssal southwest Pacific basin has warmed significantly between 1992 and 2017, affecting the heat budget and diffusive heat fluxes in the basin. Different methods are used to estimate vertical diffusive heat fluxes, including temperature measurements, parameterization, and kinetic energy parameterization.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Oceanography
K. Katsumata, L. D. Talley, T. A. Capuano, C. B. Whalen
Summary: The study shows that the variability of turbulent kinetic energy dissipation and diapycnal diffusivity in the Indian Ocean is mainly dependent on diffusivity, with different patterns in high latitudes and other latitudes. Furthermore, diffusivity from the seabed to 4,000 m above the seabed is positively correlated with topographic roughness and wind power injected through the surface at near-inertial frequencies.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Editorial Material
Oceanography
Dean Roemmich, Lynne Talley, Nathalie Zilberman, Emily Osborne, Kenneth Johnson, Leticia Barbero, Henry Bittig, Nathan Briggs, Andrea Fassbender, Gregory Johnson, Brian King, Elaine McDonagh, Sarah Purkey, Stephen Riser, Toshio Suga, Yui Takeshita, Virginie Thierry, Susan Wijffels
Article
Environmental Sciences
Jia-Rui Shi, Lynne D. Talley, Shang-Ping Xie, Qihua Peng, Wei Liu
Summary: This study reveals that acceleration of zonal flow in the Southern Ocean in recent decades is a consequence of uneven ocean warming, particularly north of the Subantarctic Front. Continued ocean warming may further accelerate zonal flow in the Southern Ocean.
NATURE CLIMATE CHANGE
(2021)
Article
Geosciences, Multidisciplinary
Channing J. Prend, Jess M. Hunt, Matthew R. Mazloff, Sarah T. Gille, Lynne D. Talley
Summary: Regional and temporal patterns of air-sea carbon exchange are influenced by surface ocean conditions including pCO2, SST, salinity, DIC and alkalinity. A study in the South Pacific found that the transition between pCO2 regimes is linked to the decrease in SST seasonal cycle amplitude.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Review
Oceanography
Cristina Arumi-Planas, Alonso Hernandez-Guerra, Veronica Cainzos, Pedro Velez-Belchi, Riccardo Farneti, Matthew R. Mazloff, Sabine Mecking, Isabella Rosso, Lena M. Schulze Chretien, Kevin G. Speer, Lynne D. Talley
Summary: The study compared meridional circulation and transport at 32 degrees S in the Pacific Ocean in 1992, 2003, 2009, and 2017, finding significant differences in circulation patterns in 2009 compared to other years.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Multidisciplinary Sciences
Katsuro Katsumata, Sarah G. Purkey, Rebecca Cowley, Bernadette M. Sloyan, Stephen C. Diggs, Thomas S. Moore, Lynne D. Talley, James H. Swift
Summary: Ship-based hydrography remains the only method for obtaining high-quality oceanographic data, but using these data is challenging due to the lack of standardized formats. A new data product aims to combine and reformat these data to facilitate wider usage and adapt to different applications.
Article
Environmental Sciences
Haidi Chen, F. Alexander Haumann, Lynne D. Talley, Kenneth S. Johnson, Jorge L. Sarmiento
Summary: The deep ocean releases large amounts of pre-industrial carbon dioxide to the atmosphere through upwelling in the Southern Ocean, which affects global climate and the ability of the Southern Ocean to absorb anthropogenic CO2. The release of CO2 is mainly concentrated in a band of upwelling waters between the Subantarctic Front and the wintertime sea-ice edge. The carbon chemistry in the subsurface waters is influenced by organic carbon remineralization and dissolution profiles, which have implications for the response of Southern Ocean CO2 fluxes to future changes in upwelling.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Environmental Sciences
Channing J. Prend, Alison R. Gray, Lynne D. Talley, Sarah T. Gille, F. Alexander Haumann, Kenneth S. Johnson, Stephen C. Riser, Isabella Rosso, Jade Sauve, Jorge L. Sarmiento
Summary: The Southern Ocean plays a crucial role in modulating the climate system through exchanging heat and carbon dioxide between the atmosphere and deep ocean. This study examines the air-sea CO2 fluxes in the Southern Ocean and the mechanisms by which carbon is transferred from the ocean interior to the mixed layer. The results suggest that carbon outgassing occurs mainly in the Indo-Pacific sector of the Antarctic Circumpolar Current due to variations in the surface ocean partial pressure of CO2.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Environmental Sciences
Channing J. Prend, M. G. Keerthi, Marina Levy, Olivier Aumont, Sarah T. Gille, Lynne D. Talley
Summary: Primary productivity in the Southern Ocean is crucial for global biogeochemical cycles. This study reveals that year-to-year variations in surface chlorophyll (SChl), a proxy for phytoplankton biomass, are mainly influenced by sub-seasonal fluctuations, rather than low-frequency climate variability.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Oceanography
Kenneth S. Johnson, Matthew R. Mazloff, Mariana B. Bif, Yuichiro Takeshita, Hans W. Jannasch, Tanya L. Maurer, Joshua N. Plant, Ariane Verdy, Peter M. Walz, Stephen C. Riser, Lynne D. Talley
Summary: Measurements of pH and nitrate were used to study the ratios of dissolved inorganic carbon (DIC) and nitrate (NO3) uptake in the Southern Ocean during the spring to summer bloom period. The effects of atmospheric CO2 exchange and mixing were separated from phytoplankton uptake using the B-SOSE model. The corrected, in situ biological uptake ratio (C:N) was found to be similar to the Redfield Ratio (RR), with a few exceptions.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Engineering, Ocean
George Matsumoto, Kenneth S. Johnson, Steve Riser, Lynne Talley, Susan Wijffels, Roberta Hotinski
Summary: The Global Ocean Biogeochemistry (GO-BGC) Array is a project to build a global network of chemical and biological sensors to monitor ocean ecosystems and health.
MARINE TECHNOLOGY SOCIETY JOURNAL
(2022)