气候变化领域集成服务门户(CCPortal): Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021

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DOI	10.1038/s41561-023-01131-4
	Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021
	Wallis, Benjamin J.; Hogg, Anna E.; van Wessem, J. Melchior; Davison, Benjamin J.; van den Broeke, Michiel R.
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	231
结束页码	+
卷号	16 期号:3 页码:16
英文摘要	Mass loss from the Antarctic Ice Sheet is dominated by ice dynamics, where ocean-driven melt leads to un-buttressing and ice flow acceleration. Long-term ice speed change has been measured in Antarctica over the past four decades; however, there are limited observations of short-term seasonal speed variability on the grounded ice sheet. Here we assess seasonal variations in ice flow speed on 105 glaciers on the west Antarctic Peninsula using Sentinel-1 satellite observations spanning 2014 to 2021. We find an average summer speed-up of 12.4 +/- 4.2%, with maximum speed change of up to 22.3 +/- 3.2% on glaciers with the most pronounced seasonality. Our results show that over the six-year study period, glaciers on the west Antarctic Peninsula respond to seasonal forcing in the ice-ocean-atmosphere system, indicating sensitivity to changes in terminus position, surface melt plus rainwater flux, and ocean temperature. Seasonal speed variations must be accounted for when measuring the mass balance and sea level contribution of the Antarctic Peninsula, and studies must establish the future evolution of this previously undocumented signal under climate warming scenarios. Glaciers on the west Antarctic Peninsula flowed on average 12% faster during the summer compared with winter due to a mix of oceanic and atmospheric influences, according to an analysis of remote sensing data from 2014 to 2021.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000940272900001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272459
作者单位	University of Leeds; Utrecht University
推荐引用方式 GB/T 7714	Wallis, Benjamin J.,Hogg, Anna E.,van Wessem, J. Melchior,et al. Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021[J],2023,16(3):16.
APA	Wallis, Benjamin J.,Hogg, Anna E.,van Wessem, J. Melchior,Davison, Benjamin J.,&van den Broeke, Michiel R..(2023).Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021.NATURE GEOSCIENCE,16(3),16.
MLA	Wallis, Benjamin J.,et al."Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021".NATURE GEOSCIENCE 16.3(2023):16.