Recent Decrease of Summer Sea Ice in the Weddell Sea, Antarctica

被引：74

作者：

Turner, John ^{[1
]}

Guarino, Maria Vittoria ^{[1
]}

Arnatt, Jack ^{[1
]}

Jena, Babula ^{[2
]}

Marshall, Gareth J. ^{[1
]}

Phillips, Tony ^{[1
]}

Bajish, C. C. ^{[2
]}

Clem, Kyle ^{[3
]}

Wang, Zhaomin ^{[4
,5
]}

Andersson, Tom ^{[1
]}

Murphy, Eugene J. ^{[1
]}

Cavanagh, Rachel ^{[1
]}

机构：

[1] NERC, British Antarctic Survey, Cambridge, England

[2] Govt India, Minist Earth Sci, Natl Ctr Polar & Ocean Res, Vasco Da Gama, India

[3] Victoria Univ Wellington, Sch Geog Environm & Earth Sci, Wellington, New Zealand

[4] Hohai Univ, Coll Oceanog, Nanjing, Peoples R China

[5] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2020年 / 47卷 / 11期

基金：

中国国家自然科学基金;

关键词：

sea ice; Antarctica; Weddell Sea; climate change; cryosphere; polynya; VARIABILITY; CIRCULATION;

D O I：

10.1029/2020GL087127

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In Austral summer 2016/2017, the sea ice extent (SIE) in the Weddell Sea dropped to a near-record value in the satellite era (1.88 x 10(6) km(2)), a large negative seasonal anomaly that persisted in an unprecedented fashion for the following three summers. Various atmospheric and oceanic factors played a part in the change. Ice loss started in September 2016 when the northern Weddell Sea experienced westerly winds of record strength, advecting multiyear sea ice from the region. In late 2016, a polynya over Maud Rise contributed to low SIE over the eastern Weddell Sea. With extensive areas of open water early in the summer, upper ocean temperatures increased by similar to 0.5 degrees C, with the anomalies persisting in subsequent years. The reappearance of the Maud Rise polynya in 2017, high ocean temperatures, and storms of record depth kept the summer SIE low.

引用

页数：11

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