气候变化领域集成服务门户(CCPortal): The 2020 Larsen C Ice Shelf surface melt is a 40-year record high

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DOI	10.5194/tc-14-3551-2020
	The 2020 Larsen C Ice Shelf surface melt is a 40-year record high
	Bevan S.; Luckman A.; Hendon H.; Wang G.
发表日期	2020
ISSN	19940416
起始页码	3551
结束页码	3564
卷号	14 期号:10
英文摘要	Along with record-breaking summer air temperatures at an Antarctic Peninsula meteorological station in February 2020, the Larsen C ice shelf experienced an exceptionally long and extensive 2019/2020 melt season. We use a 40-year time series of passive and scatterometer satellite microwave data, which are sensitive to the presence of liquid water in the snow pack, to reveal that the extent and duration of melt observed on the ice shelf in the austral summer of 2019/2020 was the greatest on record. We find that unusual perturbations to Southern Hemisphere modes of atmospheric flow, including a persistently positive Indian Ocean Dipole in the spring and a very rare Southern Hemisphere sudden stratospheric warming in September 2019, preceded the exceptionally warm Antarctic Peninsula summer. It is likely that teleconnections between the tropics and southern high latitudes were able to bring sufficient heat via the atmosphere and ocean to the Antarctic Peninsula to drive the extreme Larsen C Ice Shelf melt. The record-breaking melt of 2019/2020 brought to an end the trend of decreasing melt that had begun in 1999/2000, will reinitiate earlier thinning of the ice shelf by depletion of the firn air content, and probably affected a much greater region than Larsen C Ice Shelf. © 2020 Author(s).
英文关键词	air temperature; ice shelf; melting; Southern Hemisphere; summer; time series analysis; warming; weather station; Indian Ocean
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202029
作者单位	Geography Department, College of Science, Swansea University, Swansea, SA2 8PP, United Kingdom; Bureau of Meteorology, Melbourne, Australia
推荐引用方式 GB/T 7714	Bevan S.,Luckman A.,Hendon H.,et al. The 2020 Larsen C Ice Shelf surface melt is a 40-year record high[J],2020,14(10).
APA	Bevan S.,Luckman A.,Hendon H.,&Wang G..(2020).The 2020 Larsen C Ice Shelf surface melt is a 40-year record high.Cryosphere,14(10).
MLA	Bevan S.,et al."The 2020 Larsen C Ice Shelf surface melt is a 40-year record high".Cryosphere 14.10(2020).