Articles | Volume 21, issue 22
https://doi.org/10.5194/bg-21-5199-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-21-5199-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Seasonal foraging behavior of Weddell seals in relation to oceanographic environmental conditions in the Ross Sea, Antarctica
Hyunjae Chung
Division of Life Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
Department of Biological Sciences, Seoul National University, Seoul 08826, Republic of Korea
current address: Division of Glacier and Earth Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
Jikang Park
Department of Biology, Kyung Hee University, Seoul 02447, Republic of Korea
Division of Glacier and Earth Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
Mijin Park
Division of Life Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
Department of Biological Sciences, Seoul National University, Seoul 08826, Republic of Korea
Yejin Kim
Division of Life Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea
Unyoung Chun
Division of EcoScience, Ewha Womans University, Seoul 03760, Republic of Korea
Sukyoung Yun
Division of Glacier and Earth Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
Won Sang Lee
Division of Glacier and Earth Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
Hyun A. Choi
School of Earth System Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
Ji Sung Na
Division of Glacier and Earth Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
School of Earth System Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
Kyungpook Institute of Oceanography, Kyungpook National University, Daegu 41566, Republic of Korea
Won Young Lee
CORRESPONDING AUTHOR
Division of Life Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
Polar Science, University of Science and Technology, 217 Gajeong-ro, Daejeon 34113, Republic of Korea
current address: Division of Glacier and Earth Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
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Liv Cornelissen, Sukyoung Yun, Jasmin McInerney, Brett Grant, Fiona Elliot, Seung-Tae Yoon, Christopher J. Zappa, Won Sang Lee, and Craig Stevens
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2025-540, https://doi.org/10.5194/essd-2025-540, 2025
Preprint under review for ESSD
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We present a decade-long mooring time series from southern Terra Nova Bay, Ross Sea, begun in December 2014 as the “DITx” array. Three sites around the Drygalski Ice Tongue record temperature, salinity, pressure, and currents. The data highlight seasonal cycles and variability, informing studies of water mass formation, ice–ocean interactions, glaciology, and regional ecosystems.
Shenjie Zhou, Pierre Dutrieux, Claudia F. Giulivi, Adrian Jenkins, Alessandro Silvano, Christopher Auckland, E. Povl Abrahamsen, Michael P. Meredith, Irena Vaňková, Keith W. Nicholls, Peter E. D. Davis, Svein Østerhus, Arnold L. Gordon, Christopher J. Zappa, Tiago S. Dotto, Theodore A. Scambos, Kathyrn L. Gunn, Stephen R. Rintoul, Shigeru Aoki, Craig Stevens, Chengyan Liu, Sukyoung Yun, Tae-Wan Kim, Won Sang Lee, Markus Janout, Tore Hattermann, Julius Lauber, Elin Darelius, Anna Wåhlin, Leo Middleton, Pasquale Castagno, Giorgio Budillon, Karen J. Heywood, Jennifer Graham, Stephen Dye, Daisuke Hirano, and Una Kim Miller
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Revised manuscript under review for ESSD
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We created the first standardised dataset of in-situ ocean measurements time series from around Antarctica collected since 1970s. This includes temperature, salinity, pressure, and currents recorded by instruments deployed in icy, challenging conditions. Our analysis highlights the dominance of tidal currents and separates these from other patterns to study regional energy distribution. This unique dataset offers a foundation for future research on Antarctic ocean dynamics and ice interactions.
Christian T. Wild, Reinhard Drews, Niklas Neckel, Joohan Lee, Sihyung Kim, Hyangsun Han, Won Sang Lee, Veit Helm, Sebastian Harry Reid Rosier, Oliver J. Marsh, and Wolfgang Rack
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The stability of the Antarctic Ice Sheet depends on how resistance along the sides of large glaciers slows down the flow of ice into the ocean. We present a method to map ice strength using the effect of ocean tides on floating ice shelves. Incorporating weaker ice in shear zones improves the accuracy of model predictions compared to satellite observations. This demonstrates the untapped potential of radar satellites to map ice stiffness in the most critical areas for ice sheet stability.
Chris Pierce, Christopher Gerekos, Mark Skidmore, Lucas Beem, Don Blankenship, Won Sang Lee, Ed Adams, Choon-Ki Lee, and Jamey Stutz
The Cryosphere, 18, 1495–1515, https://doi.org/10.5194/tc-18-1495-2024, https://doi.org/10.5194/tc-18-1495-2024, 2024
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Water beneath glaciers in Antarctica can influence how the ice slides or melts. Airborne radar can detect this water, which looks bright in radar images. However, common techniques cannot identify the water's size or shape. We used a simulator to show how the radar image changes based on the bed material, size, and shape of the waterbody. This technique was applied to a suspected waterbody beneath Thwaites Glacier. We found it may be consistent with a series of wide, flat canals or a lake.
Christine F. Dow, Derek Mueller, Peter Wray, Drew Friedrichs, Alexander L. Forrest, Jasmin B. McInerney, Jamin Greenbaum, Donald D. Blankenship, Choon Ki Lee, and Won Sang Lee
The Cryosphere, 18, 1105–1123, https://doi.org/10.5194/tc-18-1105-2024, https://doi.org/10.5194/tc-18-1105-2024, 2024
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Ice shelves are a key control on Antarctic contribution to sea level rise. We examine the Nansen Ice Shelf in East Antarctica using a combination of field-based and satellite data. We find the basal topography of the ice shelf is highly variable, only partially visible in satellite datasets. We also find that the thinnest region of the ice shelf is altered over time by ice flow rates and ocean melting. These processes can cause fractures to form that eventually result in large calving events.
Ji Sung Na, Taekyun Kim, Emilia Kyung Jin, Seung-Tae Yoon, Won Sang Lee, Sukyoung Yun, and Jiyeon Lee
The Cryosphere, 16, 3451–3468, https://doi.org/10.5194/tc-16-3451-2022, https://doi.org/10.5194/tc-16-3451-2022, 2022
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Beneath the Antarctic ice shelf, sub-ice-shelf plume flow that can cause turbulent mixing exists. In this study, we investigate how this flow affects ocean dynamics and ice melting near the ice front. Our results obtained by validated simulation show that higher turbulence intensity results in vigorous ice melting due to the high heat entrainment. Moreover, this flow with meltwater created by this flow highly affects the ocean overturning circulations near the ice front.
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Short summary
Understanding how marine animals adapt to variations in marine environmental conditions is paramount. In this paper, we investigated the influence of changes in seawater and light conditions on the seasonal foraging behavior of Weddell seals in the Ross Sea, Antarctica. Our findings could serve as a baseline and establish a foundational understanding for future research, particularly concerning the impact of marine environmental changes on the ecosystem of the Ross Sea Marine Protected Area.
Understanding how marine animals adapt to variations in marine environmental conditions is...
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