Impact of strong katabatic wind event variability on sea ice dynamics in Terra Nova Bay Polynya, Antarctica
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Title
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Impact of strong katabatic wind event variability on sea ice dynamics in Terra Nova Bay Polynya, Antarctica
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Other Titles
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남극 테라노바만 폴리냐의 해빙 역학에 대한 강한 활강풍 변동성의 영향
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Authors
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Yuanyuan Xu
Rui Mao
Kim, Seong-Joong
Minghu Ding
Daoyi Gong
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Keywords
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강풍 이벤트; 테라노바만; 해빙
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Issue Date
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2025-10
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Citation
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Yuanyuan Xu, et al. 2025. "Impact of strong katabatic wind event variability on sea ice dynamics in Terra Nova Bay Polynya, Antarctica". Environmental Research Letters, 20(11): 0-0.
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Abstract
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Polynyas along the Antarctic coastline are essential for sea ice production and the formation of
Antarctic Bottom Water (AABW). They are formed and maintained by strong and persistent
katabatic winds that push the ice away from the coast. Satellite data, in-situ meteorological
observations and Reanalysis datasets all indicate a decline in sea ice concentration (SIC) over the
Terra Nova Bay Polynya (TNBP) from 2013 to 2022, consistent with the occurrence of an
increasing trend of strong katabatic wind events (SKWEs). On the interannual timescale,
significant correlations between the TNBP area and the duration of SKWEs were observed in
austral summer, autumn and winter, and also in April and October during 2003?2022. Sea ice
volume budget analysis shows that SKWEs drive rapid sea-ice removal through advection and
divergence, whereas thermodynamic processes dominate sea ice formation on an annual basis. The
increase in SKWEs was associated with a deepened and southwestward-displaced Amundsen Sea
Low (ASL) and an enhanced pressure gradient between the interior plateau and the coast, both
potentially linked to a more positive Southern Annular Mode (SAM). These findings provide a
mechanistic understanding of long-term polynya variability, with implications for regional sea-ice
changes and AABW.
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URI
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https://repository.kopri.re.kr/handle/201206/16596
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DOI
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http://dx.doi.org/10.1088/1748-9326/ae06bb
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Type
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Article
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Station
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Jang Bogo Station
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Indexed
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SCIE
- Appears in Collections
- 2025-2025, 남극 기후 환경 변화 이해와 전지구 영향 평가 (25-25) / 정의석 (PE25030)
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