Article
Geosciences, Multidisciplinary
A. Solodoch, A. L. Stewart, A. McC. Hogg, A. K. Morrison, A. E. Kiss, A. F. Thompson, S. G. Purkey, L. Cimoli
Summary: This study uses a global high-resolution ocean/sea-ice simulation and passive tracer deployments to examine the export pathways of Antarctic Bottom Water (AABW). The results show that AABW from different source regions are blended during their export, with Weddell Sea- and Prydz Bay-sourced AABW mainly exported to the Atlantic and Indian Oceans, while Ross Sea- and Adelie Land-sourced AABW mainly exported to the Pacific Ocean. This has important implications for the three-dimensional structure of the global overturning circulation.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Oceanography
Chiung-Yin Chang, Malte F. Jansen
Summary: The study reveals a disagreement between existing scaling theories, partly explained by the distinct measurements of overturning strengths in the channel and basin scales under different external parameters.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Oceanography
Jan-Erik Tesdal, Graeme A. MacGilchrist, Rebecca L. Beadling, Stephen M. Griffies, John P. Krasting, Paul J. Durack
Summary: Two different climate models have been used to study the impact of wind stress and Antarctic ice sheet melting on the Southern Ocean meridional overturning circulation (SO MOC). The study shows that the largest impact is found in the lower limb of the SO MOC, associated with the formation of Antarctic Bottom Water (AABW), which is enhanced by wind and weakened by AIS meltwater perturbations. Both models indicate a reduction in AABW transport due to AIS melting, however, the higher resolution simulation shows a greater volume deflation of AABW south of 30°S.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Multidisciplinary Sciences
M. Martin, R. Venkatesan, Robert A. Weller, Amit Tandon, K. Jossia Joseph
Summary: The article describes the discovery of seasonal warming and cooling in the abyssal ocean, and investigates the potential factors contributing to this phenomenon.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Andrew L. Stewart, Xiaoyang Chi, Aviv Solodoch, Andrew McC Hogg
Summary: The transport of Antarctic Bottom Water is influenced by wind stress fluctuations, which drive fluctuations in transport on time scales shorter than 2 years, mainly due to differences in response time scales of topographic and interfacial form stresses to wind variability. This implies that the transport variability of Antarctic Bottom Water can largely be reconstructed from surface wind stress alone.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Editorial Material
Environmental Sciences
L. Caesar, S. Rahmstorf, G. Feulner
Summary: The comment on the paper argues that the analysis showing a positive correlation between Atlantic meridional overturning circulation (AMOC) strength and global mean surface temperature (GMST) over the last decades is incorrect, based on two points which are not justified. However, the authors defend their analysis with evidence from the modern period and multiple cycles of data.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Review
Meteorology & Atmospheric Sciences
Frank J. Pavia, C. Spencer Jones, Sophia K. Hines
Summary: This paper critically assesses the approaches used to determine the geometry of Atlantic circulation during the Last Glacial Maximum (LGM) and provides best practices for future research. The study highlights the complexity of interpreting geochemical proxies as water mass structure due to small-scale mixing processes in the ocean interior. It outlines promising paths for further ascertaining the LGM circulation structure.
JOURNAL OF CLIMATE
(2022)
Article
Geosciences, Multidisciplinary
M. D. Thomas, A. Fedorov, N. J. Burls, W. Liu
Summary: Research suggests that North Pacific deep water formation and a Pacific meridional overturning circulation (PMOC) may have been active during the Pliocene epoch, different from the modern-day climate conditions. Most subducted North Pacific deep water upwells in the Southern Ocean, but around 15% upwells in the tropical Indo-Pacific Oceans, distinguishing the PMOC from the present-day AMOC. The connection to the Indian Ocean is relatively fast at about 250 years, while the connection to the tropical Pacific is slower, taking around 800 years.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Thomas Rackow, Sergey Danilov, Helge F. Goessling, Hartmut H. Hellmer, Dmitry Sein, Tido Semmler, Dmitry Sidorenko, Thomas Jung
Summary: Delayed decline of Antarctic sea-ice is connected to Southern Ocean eddies, and it is crucial to explicitly include them in models. New multi-resolution climate change projections may explain the low confidence in the current 21st-century projections for Antarctic sea-ice made by the IPCC.
NATURE COMMUNICATIONS
(2022)
Article
Meteorology & Atmospheric Sciences
Yona Silvy, Jean-Baptiste Sallee, Eric Guilyardi, Juliette Mignot, Clement Rousset
Summary: This study investigates the mechanisms driving regional ocean warming and its emergence from internal variability. It finds that the contribution of different processes can vary in time, affecting the time of emergence of subsurface temperature changes.
JOURNAL OF CLIMATE
(2022)
Article
Oceanography
Nicholas P. Foukal, Robert S. Pickart
Summary: This study presents the first continuous mooring records of the West Greenland Coastal Current (WGCC), which is a conduit of fresh, buoyant outflow from the Arctic Ocean and the Greenland Ice Sheet. The results show that the WGCC on the southwest Greenland shelf is a distinct current with strong variability in its lateral position. Additionally, the study finds that the WGCC has a similar strength to the East Greenland Coastal Current (EGCC), but transports less liquid freshwater due to its higher salinity.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Oceanography
Ashwita Chouksey, Alexa Griesel, Manita Chouksey, Carsten Eden
Summary: We investigate the impact of variation in isopycnal diffusivity on ocean circulation using a non-eddy-resolving model. Our findings show that changes in diffusivity have a surprisingly large effect on the strength of the Atlantic residual overturning circulation and the Antarctic Circumpolar Current. This highlights the importance of accurately representing isopycnal diffusion in models.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Meteorology & Atmospheric Sciences
Yuan-Jen Lin, Briane. J. Rose, Yen -Ting Hwang
Summary: While most models agree that the Atlantic meridional overturning circulation (AMOC) becomes weaker under greenhouse gas emission and is likely to weaken over the twenty-first century, they disagree on the projected magnitudes of AMOC weakening. CMIP6 models with stronger climatological AMOC are shown to project stronger AMOC weakening in both 1% ramping CO2 and abrupt CO2 quadrupling simulations. This is because models with stronger mean state AMOC exhibit weaker stratification in the upper Labrador Sea, allowing for stronger mixing of the surface buoyancy flux and leading to subsurface warming and AMOC weakening.
JOURNAL OF CLIMATE
(2023)
Article
Oceanography
Suyash Bire, Christopher L. P. Wolfe
Summary: The study examines the zonal and meridional overturning circulations in buoyancy-forced basins using an eddy-resolving model. It reveals that the zonal overturning circulation is driven by meridional gradients, which in turn influence the meridional overturning circulation. Eddies play a significant role in broadening the circulation patterns and affecting the distribution of vertical transport in the basins.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Meteorology & Atmospheric Sciences
Aixue Hu, Gerald A. Meehl, Nan Rosenbloom, Maria J. Molina, Warren G. Strand
Summary: The collapse of the AMOC has significant impacts on global ocean circulation and surface climate, inducing changes in ocean transport, wind patterns, and surface temperature distribution. The study also found that AMOC and PMOC do not form a natural seesaw under modern climate conditions, highlighting the importance of external factors in maintaining the stability of these circulation systems.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Gregory C. Johnson, Caitlin B. Whalen, Sarah G. Purkey, Nathalie Zilberman
Summary: Vertical velocity variances and dominant vertical wavelengths show regional variations, with larger root < w '(2)> and shorter lambda(z) in regions of rougher bathymetry or stronger deep currents.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
A. Solodoch, A. L. Stewart, A. McC. Hogg, A. K. Morrison, A. E. Kiss, A. F. Thompson, S. G. Purkey, L. Cimoli
Summary: This study uses a global high-resolution ocean/sea-ice simulation and passive tracer deployments to examine the export pathways of Antarctic Bottom Water (AABW). The results show that AABW from different source regions are blended during their export, with Weddell Sea- and Prydz Bay-sourced AABW mainly exported to the Atlantic and Indian Oceans, while Ross Sea- and Adelie Land-sourced AABW mainly exported to the Pacific Ocean. This has important implications for the three-dimensional structure of the global overturning circulation.
GEOPHYSICAL RESEARCH LETTERS
(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
Oceanography
Ankitha Kannad, Nathalie F. Goodkin, Dhrubajyoti Samanta, Sujata A. Murty, Riovie D. Ramos, Jason E. Smerdon, Arnold L. Gordon
Summary: The flow of Pacific water into the Indian Ocean via the South China Sea and Maritime Continent plays a crucial role in the ocean thermohaline circulation. Climate variability, such as the East Asian monsoon and major climate modes, affects the transport and salinity of the water. The recent intensification and dominance of the Indian Ocean Dipole and El Nino Southern Oscillation may have implications for regional and global thermohaline circulation.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Alexander J. Herron, Shannon M. Bohman, Arnold L. Gordon
Summary: This study investigates the significance of eddies in the removal of excess freshwater injected into the Bay of Bengal. The findings highlight the importance of eddies, especially in the upper 50 meters, in removing most of the river runoff.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Geosciences, Multidisciplinary
Thomas L. Weiss, Braddock K. Linsley, Arnold L. Gordon, Yair Rosenthal, Stefanie Dannenmann-Di Palma
Summary: This study estimates the relative changes of the South China Sea surface flow through the Sulu Sea over the past 140,000 years using foraminifera chemistry. The results constrain the global mean sea level during the intermediate interglacial Marine Isotope Stage 3 (MIS 3) and confirm the role of the Sunda Shelf as a land-bridge during this period for human and megafauna migration.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Geochemistry & Geophysics
Shannon M. Bohman, Arnold L. Gordon
Summary: This study combines Argo temperature and salinity profiles with satellite altimetry and reanalysis data to investigate seasonal variations in the Bay of Bengal. The results show that regions with high sea level anomaly have more pronounced seasonal changes and a greater heat loss compared to regions with low sea level anomaly.
DYNAMICS OF ATMOSPHERES AND OCEANS
(2022)
Article
Environmental Sciences
Celine Heuze, Sarah G. Purkey, Gregory C. Johnson
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Oceanography
F. M. Bingham, S. K. Brodnitz, A. L. Gordon
Summary: The sea surface salinity (SSS) maximum of the South Indian Ocean (the SISSS-max) is a high-salinity feature centered at 30°S, 90°E, near the center of the South Indian subtropical gyre. It moves seasonally and interannually, with changes in size and maximum SSS, influenced by variations in evaporation, precipitation, wind forcing, gyre-scale ocean circulation, and downward Ekman pumping. The motion of SISSS-max correlates with SSS changes throughout the South Indian Ocean and may indicate changes in the basin's subtropical circulation.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Oceanography
Laura K. Gruenburg, Arnold L. Gordon, Andreas M. Thurnherr
Summary: The Indonesian Throughflow (ITF) waters move along different pathways in the Indian Ocean. The heat content anomaly (HCa) in the ITF box showed a large increase in 2011, which was not observed in the SEC box but evident in the LC box. The strength of the SEC and LC played a role in transmitting the HCa signal to different parts of the Indian Ocean.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Correction
Multidisciplinary Sciences
Melissa M. Bowen, Denise Fernandez, Arnold L. Gordon, Bruce Huber, Pasquale Castagno, Pierpaolo Falco, Giorgio Budillon, Kathryn L. Gunn, Aitana Forcen-Vazquez
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Mingting Li, Ziyang Cao, Arnold L. Gordon, Fei Zheng, Dongxiao Wang
Summary: This study reveals the role of tropical Indo-Pacific oceanic interactions in driving the first triple-dip La Nina event of the twenty-first century. The subsurface warming anomalies in the eastern Indian Ocean were associated with the re-intensification of the subsequent La Nina event. These anomalies were propagated eastward by equatorial and coastal subsurface Kelvin waves and contributed to the accumulation of heat content in the western Pacific Ocean. The westward Indonesian Throughflow transported more heat during multi-year La Nina events, resulting in the injection of warm water into the eastern Indian Ocean and prolonging the heat content in the western Pacific during the decay phase of La Nina.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Melissa M. Bowen, Denise Fernandez, Arnold L. Gordon, Bruce Huber, Pasquale Castagno, Pierpaolo Falco, Giorgio Budillon, Kathryn L. Gunn, Aitana Forcen-Vazquez
Summary: Antarctic Bottom Water (AABW) stores heat and gases over decades to centuries and shows changes in water properties and volume. The density and speed of the outflow are controlled by the density in Terra Nova Bay and tidal mixing. Tides create peaks in density and flow each year and can explain much of the decadal variability in the outflow.
SCIENTIFIC REPORTS
(2023)
Article
Meteorology & Atmospheric Sciences
Shanice T. T. Bailey, C. Spencer Jones, Ryan P. P. Abernathey, Arnold L. L. Gordon, Xiaojun Yuan
Summary: This study investigates the variability of water mass transformation within the Weddell Gyre, which plays a crucial role in the Meridional Overturning Circulation and ocean ventilation. Recent data suggest substantial variability in Antarctic Bottom Water properties exiting the Weddell Gyre, but the thermodynamic mechanisms linking surface forcings to water mass transformations and AABW export remain unclear. This study examines current ocean reanalyses to fill the gaps in our understanding of the drivers of AABW variability.
Article
Marine & Freshwater Biology
Edmo J. D. Campos, Arnold L. Gordon, Georgenes Cavalcante, Bjon Kjerfve, Mohamed Abouleish
Summary: Warm saline water masses from the Persian Gulf and the Red Sea have a significant impact on the upper layers of the northern Indian Ocean, affecting thermocline stratification, circulation, and air-sea exchanges. By simulating the closure of the Red Sea and Persian Gulf, it is found that there are marked differences in the seasonal variability and air-sea fluxes in the Arabian Sea and Bay of Bengal. The experiments suggest that the upwelling in the southwestern Bay of Bengal would have responded differently to the El Nino-La Nina event in the absence of the Persian Gulf and Red Sea input.
OCEAN AND COASTAL RESEARCH
(2022)
