Article
Geosciences, Multidisciplinary
Wilton Aguiar, Sang-Ki Lee, Hosmay Lopez, Shenfu Dong, Helene Seroussi, Dani C. Jones, Adele K. Morrison
Summary: Melting of the ice sheet in the Southern Ocean has implications for the formation and properties of the Antarctic Bottom Water (AABW). Models have been used to examine the effects of different spatial distributions and magnitudes of meltwater fluxes on AABW. The study finds that a realistic and spatially varying meltwater flux can sustain AABW with higher salinities compared to uniform meltwater flux simulations. Furthermore, the increasing meltwater discharge from the Antarctic ice sheet can contribute to the observed freshening of AABW.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Qin Wen, Chenyu Zhu, Zixuan Han, Zhengyu Liu, Haijun Yang
Summary: Research suggests that the Tibetan Plateau has a significant impact on Southern Ocean circulation, with its removal potentially enhancing Antarctic bottom water circulation and affecting global climate. This impact is mainly achieved by increasing Rossby wave trains from the tropical Indo-Pacific to the Amundsen-Bellingshausen Sea.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Review
Environmental Sciences
Xichen Li, Wenju Cai, Gerald A. Meehl, Dake Chen, Xiaojun Yuan, Marilyn Raphael, David M. Holland, Qinghua Ding, Ryan L. Fogt, Bradley R. Markle, Guojian Wang, David H. Bromwich, John Turner, Shang-Ping Xie, Eric J. Steig, Sarah T. Gille, Cunde Xiao, Bingyi Wu, Matthew A. Lazzara, Xianyao Chen, Sharon Stammerjohn, Paul R. Holland, Marika M. Holland, Xiao Cheng, Stephen F. Price, Zhaomin Wang, Cecilia M. Bitz, Jiuxin Shi, Edwin P. Gerber, Xi Liang, Hugues Goosse, Changhyun Yoo, Minghu Ding, Lei Geng, Meijiao Xin, Chuanjin Li, Tingfeng Dou, Chengyan Liu, Weijun Sun, Xinyue Wang, Chentao Song
Summary: A substantial climatic changes have been observed in the Antarctic over the modern satellite era, many of which are believed to be influenced by tropical-polar teleconnections through Rossby wave dynamics. These connections play a significant role in shaping Antarctic climate variability and changes in recent years.
NATURE REVIEWS EARTH & ENVIRONMENT
(2021)
Article
Oceanography
Esther Portela, Stephen R. Rintoul, Laura Herraiz-Borreguero, Fabien Roquet, Sophie Bestley, Esmee van Wijk, Takeshi Tamura, Clive R. McMahon, Christophe Guinet, Robert Harcourt, Mark A. Hindell
Summary: Coastal polynyas are important regions for dense shelf water (DSW) formation, and their formation is regulated by factors such as physiographic setting, water-mass distribution and transformation, water column stratification, and sea-ice production. Our study highlights the complex combination of factors that contribute to DSW formation in polynyas, some of which may be affected by climate change, with potential implications for deep ocean ventilation and Antarctic ice shelf melting.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
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
Chao Zhang, Tim Li, Shuanglin Li
Summary: Based on observational data analyses and idealized modeling experiments, researchers found that EP El Nino and CP El Nino have distinct impacts on the Antarctic sea ice concentration, with EP El Nino inducing anomalous anticyclone and associated dipole temperature pattern in the Antarctic region, while CP El Nino causes a similar anticyclone pattern with a westward location shift of 20 degrees in longitudes. This leads to changes in surface wind patterns, surface heat fluxes, and consequent sea ice melting or growth in different regions of the Antarctic Ocean.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Felipe Gomez-Valdivia, Paul R. Holland, Antony Siahaan, Pierre Dutrieux, Emma Young
Summary: Using simulations of the United Kingdom Earth System Model, this study analyzes the dynamics of the Ross Gyre (RG) during the historical period of 1850-2014 and under two future climate change scenarios. The results show a relatively stable RG in the model, consistent with observations, but project an expansion towards the Amundsen-Bellingshausen Seas in the 2040s. This expansion leads to enhanced onshore transport of warm Circumpolar Deep Water, increasing local shelf temperatures by up to 1.2 degrees C and independent of future climate change scenarios. The expansion is caused by regional ocean surface stress curl intensification due to anthropogenic sea ice loss. If realized, this warming would greatly impact the stability of the West Antarctic Ice Sheet.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Jinfei Wang, Hao Luo, Lejiang Yu, Xuewei Li, Paul R. Holland, Qinghua Yang
Summary: Both the Southern Annular Mode (SAM) and El Nifio-Southern Oscillation (ENSO) have complex and uncertain joint effects on seasonal Antarctic sea ice changes. The impacts of SAM and ENSO on southern high latitudes are influenced by wave activity, atmospheric circulation anomalies, and their interactions. In-phase events exhibit SIC dipole patterns, while out-of-phase events result in significant SIC anomalies in the Indian Ocean and western Pacific Ocean. Sea ice budget analyses reveal that both thermodynamic and dynamic processes contribute to sea ice intensification anomalies.
JOURNAL OF CLIMATE
(2023)
Article
Geosciences, Multidisciplinary
A. K. DuVivier, M. M. Holland, L. Landrum, H. A. Singh, D. A. Bailey, E. A. Maroon
Summary: The study found that using a sea ice model that is more realistic can lead to changes in sea ice production along coasts and have impacts on the ocean and atmosphere. The experiment with mushy ice physics showed increased production of sea ice, leading to denser and saltier subsurface ocean, increased Antarctic Bottom Water formation, and decreased turbulent heat flux and low-level cloud cover near the Antarctic coast.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Fu Zhao, Xi Liang, Zhongxiang Tian, Chengyan Liu, Xichen Li, Yun Yang, Ming Li, Na Liu
Summary: The response of Antarctic sea ice to the long-term trend of local atmospheric forcing shows significant spatial variabilities. The sea ice area and volume decrease in the Weddell Sea and increase in the Ross Sea, while in the Amundsen-Bellingshausen Seas sector, the sea ice area decreases from December to June and increases from July to November, with a decrease in sea ice volume throughout the year. In the Indian-Western Pacific Oceans sector, the sea ice area decreases from January to May and increases from June to December, with an increase in sea ice volume throughout the year.
Article
Multidisciplinary Sciences
Simon Dietz, Felix Koninx
Summary: The melting of the Antarctic Ice Sheet will have significant economic impacts, particularly on Small Island Developing States. Costs can be reduced dramatically through efficient and proactive coastal planning. Additionally, the melting of the Antarctic Ice Sheet will increase the social cost of carbon.
NATURE COMMUNICATIONS
(2022)
Article
Environmental Sciences
E. Bergami, E. Ferrari, M. G. J. Loeder, G. Birarda, C. Laforsch, L. Vaccari, I Corsi
Summary: Antarctica has been directly and indirectly affected by human pressure, and plastic pollution is recognized as a potential threat to its unique biodiversity. This study found textile microplastic fibers in Antarctic whelk specimens, indicating potential local sources from base station sewage. Further monitoring studies are encouraged to understand the extent of plastic pollution related to such sources in Antarctica.
ENVIRONMENTAL RESEARCH
(2023)
Article
Oceanography
Daniel N. Goldberg, Andrew G. Twelves, Paul R. Holland, Martin G. Wearing
Summary: Little is known about Antarctic subglacial hydrology, but it is believed that subglacial runoff enhances submarine melt locally through buoyancy effects. This study examines the effects of runoff on sea ice and oceanography on the Continental Shelf, and finds that runoff enhances localized melt and reduces summer sea ice volume. Runoff-driven melt and circulation may be an important missing process in regional Antarctic ocean models.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Environmental Sciences
Guijun Guo, Libao Gao, Jiuxin Shi
Summary: Recent studies have shown a rapid increase in the salinity of Dense Shelf Water (DSW) in the western Ross Sea; significant multidecadal variability of DSW salinity has been observed over the past few decades; the long-term variability of DSW salinity is strongly coupled with changes in zonal flow along the coastal current.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
George A. Whitehouse, Kerim Y. Aydin, Anne B. Hollowed, Kirstin K. Holsman, Wei Cheng, Amanda Faig, Alan C. Haynie, Albert J. Hermann, Kelly A. Kearney, Andre E. Punt, Timothy E. Essington
Summary: The study investigated the impacts of climate change on the Eastern Bering Sea food web and found that most species and functional groups showed a slow but steady decline in biomass over time, with biomass projections nearing or falling below recent historical levels by 2080.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Multidisciplinary Sciences
A. K. Wahlin, N. Steiger, E. Darelius, K. M. Assmann, M. S. Glessmer, H. K. Ha, L. Herraiz-Borreguero, C. Heuze, A. Jenkins, T. W. Kim, A. K. Mazur, J. Sommeria, S. Viboud
Article
Geosciences, Multidisciplinary
Indrani Das, Laurie Padman, Robin E. Bell, Helen A. Fricker, Kirsty J. Tinto, Christina L. Hulbe, Christine S. Siddoway, Tejendra Dhakal, Nicholas P. Frearson, Cyrille Mosbeux, S. Isabel Cordero, Matthew R. Siegfried
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2020)
Article
Oceanography
Carolyn Branecky Begeman, Slawek Tulaczyk, Laurie Padman, Matt King, Matthew R. Siegfried, Timothy O. Hodson, Helen A. Fricker
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Geography, Physical
Emilie Klein, Cyrille Mosbeux, Peter D. Bromirski, Laurie Padman, Yehuda Bock, Scott R. Springer, Helen A. Fricker
JOURNAL OF GLACIOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Susheel Adusumilli, Helen Amanda Fricker, Brooke Medley, Laurie Padman, Matthew R. Siegfried
Article
Oceanography
Tiago S. Dotto, Alberto C. Naveira Garabato, Anna K. Wahlin, Sheldon Bacon, Paul R. Holland, Satoshi Kimura, Michel Tsamados, Laura Herraiz-Borreguero, Ola Kalen, Adrian Jenkins
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Multidisciplinary Sciences
Till M. Baumann, Igor V. Polyakov, Laurie Padman, Seth Danielson, Ilker Fer, Markus Janout, William Williams, Andrey V. Pnyushkov
Article
Oceanography
Peter Washam, Keith W. Nicholls, Andreas Munchow, Laurie Padman
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Geosciences, Multidisciplinary
Maya K. Becker, Susan L. Howard, Helen A. Fricker, Laurie Padman, Cyrille Mosbeux, Matthew R. Siegfried
Summary: The mass loss of Antarctica's three largest ice shelves is mainly caused by calving, particularly of large tabular icebergs occurring every few decades. The study used surface elevation data from NASA's ICESat-2 laser altimeter to analyze the structure of the Ross Ice Shelf, revealing bending stresses caused by a submerged ice bench resulting from ice-front melting. These stresses may lead to small-scale calving events, influenced by variations in summer sea ice and atmosphere-ocean heat exchanges.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
A. K. Wahlin, A. G. C. Graham, K. A. Hogan, B. Y. Queste, L. Boehme, R. D. Larter, E. C. Pettit, J. Wellner, K. J. Heywood
Summary: The study presents the first direct observations of ocean temperature, salinity, and oxygen beneath the Thwaites Ice Shelf front, identifying pathways and modifications of water flow into the cavity, as well as the inflow of warm water and outflow of melt-enriched waters in two seafloor troughs. The observations highlight a convergence zone in one trough where different water masses meet and mix, showing warm water impinging on pinning points critical to ice-shelf stability from all sides.
Article
Geosciences, Multidisciplinary
Nadine Steiger, Elin Darelius, Anna K. Wahlin, Karen M. Assmann
Summary: The study reveals that Winter Water deepening intermittently disrupts the flow of warm water toward the western Getz Ice Shelf along the Siple Trough in West Antarctica, reducing heat transport by 25%. These 5-10 days-long events are influenced by strong easterly winds and polynya opening, but controlled by non-local coastal Ekman downwelling. During the events, the flow at depth aligns with the ice front rather than continuing into the ice shelf cavity along isobaths.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
H. W. Yang, T-W Kim, Pierre Dutrieux, A. K. Wahlin, Adrian Jenkins, H. K. Ha, C. S. Kim, K-H Cho, T. Park, S. H. Lee, Y-K Cho
Summary: This study investigates the seasonal variability and local forcing for the currents moving into and out of the Dotson ice shelf cavity using data from three bottom-mounted mooring arrays. It reveals that warm, salty water flows southward along the eastern channel slope, with maximum current velocities. On the other hand, freshened ice shelf meltwater flows northward at intermediate depth above the western slope. The inflow is correlated with local ocean surface stress curl, while the outflow follows the warm influx with a delay of about 2-3 months. Ocean circulation near Dotson Ice Shelf, affected by sea ice distribution and wind, significantly controls the inflow of warm water and subsequent ice shelf melting on seasonal time-scales.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
Alastair G. C. Graham, Anna Wahlin, Kelly A. Hogan, Frank O. Nitsche, Karen J. Heywood, Rebecca L. Totten, James A. Smith, Claus-Dieter Hillenbrand, Lauren M. Simkins, John B. Anderson, Julia S. Wellner, Robert D. Larter
Summary: Recent research reveals that the grounding zone of Thwaites Glacier has experienced sustained pulses of rapid retreat over the past two centuries. Similar rapid retreat pulses are likely to occur in the near future when the grounding zone migrates back off stabilizing high points on the sea floor.
Article
Multidisciplinary Sciences
Tiago S. Dotto, Karen J. Heywood, Rob A. Hall, Ted A. Scambos, Yixi Zheng, Yoshihiro Nakayama, Shuntaro Hyogo, Tasha Snow, Anna K. Wahlin, Christian Wild, Martin Truffer, Atsuhiro Muto, Karen E. Alley, Lars Boehme, Guilherme A. Bortolotto, Scott W. Tyler, Erin Pettit
Summary: This study reveals that the thinning of the West Antarctic ice shelves is primarily caused by ocean-driven basal melting. Local ocean circulation and sea-ice play an important role in this process. The research shows that meltwater from the Pine Island Ice Shelf enters the Thwaites Eastern Ice Shelf cavity, increasing heat transport and temperature in the upper layer. The study emphasizes the sensitivity of ocean circulation beneath ice shelves to atmospheric, sea-ice, and oceanic forcing in neighboring open oceans.
NATURE COMMUNICATIONS
(2022)
Editorial Material
Oceanography
Lisa M. Beal, Laurie Padman, Lei Zhou, Arvind Singh, Don Chambers, Marjy Friedrichs, Chellappan Gnanaseelan, Nathalie Goodkin, Robert Hetland, Ryan Mulligan, Takeyoshi Nagai, Joanne O'Callaghan, Nadia Pinardi, Hannah Power, Lars Umlauf, Anna Wahlin, Fanghua Xu
Summary: JGR-Oceans has received more diverse submissions from a broader range of authors, but reviewer burnout and editor bias are threatening the quality and fairness of the journal. To address these issues, the journal has recruited new editors, implemented a rubric to ensure manuscripts communicate new understanding of the ocean, fostered a culture of collaboration, and encouraged submissions on biogeochemical processes and human interaction with ocean variability and change.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
