暖环极深水侵入南极冰架的季节变化。

IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Communications Earth & Environment Pub Date : 2025-01-01 Epub Date: 2025-03-01 DOI:10.1038/s43247-025-02091-w
Joshua Lanham, Matthew Mazloff, Alberto C Naveira Garabato, Martin Siegert, Ali Mashayek
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引用次数: 0

摘要

南极冰架的基底融化主要是由温暖的环极深水的热量输送驱动的。在这里,我们在南大洋的涡旋解析数值模式中对近陆架水团进行分类,以形成暖水侵入南极大陆架的统一视图。我们在季节时间尺度上确定了四种制度。在状态1(东南极洲),热侵入由东风通过Ekman动力学驱动。在状态2(南极洲西部),入侵主要由陆架断裂潜流的强度决定。在状态3中,陆架上的温水循环与密集的陆架产水处于反相(adsamlie Coast)。最后,在状态4(威德尔海和罗斯海)中,在陆架水密集流出期间,沿峡谷西部边缘向陆架方向流入的暖水发生。我们的研究结果主张重新制定南极大陆架的传统年平均制度分类。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seasonal regimes of warm Circumpolar Deep Water intrusion toward Antarctic ice shelves.

Basal melting of Antarctic ice shelves is primarily driven by heat delivery from warm Circumpolar Deep Water. Here we classify near-shelf water masses in an eddy-resolving numerical model of the Southern Ocean to develop a unified view of warm water intrusion onto the Antarctic continental shelf. We identify four regimes on seasonal timescales. In regime 1 (East Antarctica), heat intrusions are driven by easterly winds via Ekman dynamics. In regime 2 (West Antarctica), intrusion is primarily determined by the strength of a shelf-break undercurrent. In regime 3, the warm water cycle on the shelf is in antiphase with dense shelf water production (Adélie Coast). Finally, in regime 4 (Weddell and Ross seas), shelf-ward warm water inflow occurs along the western edge of canyons during periods of dense shelf water outflow. Our results advocate for a reformulation of the traditional annual-mean regime classification of the Antarctic continental shelf.

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来源期刊
Communications Earth & Environment
Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
8.60
自引率
2.50%
发文量
269
审稿时长
26 weeks
期刊介绍: Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.
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