气候变化领域集成服务门户(CCPortal): Faster decline and higher variability in the sea ice thickness of the marginal Arctic seas when accounting for dynamic snow cover

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DOI	10.5194/tc-15-2429-2021
	Faster decline and higher variability in the sea ice thickness of the marginal Arctic seas when accounting for dynamic snow cover
	Mallett R.D.C.; Stroeve J.C.; Tsamados M.; Landy J.C.; Willatt R.; Nandan V.; Liston G.E.
发表日期	2021
ISSN	19940416
起始页码	2429
结束页码	2450
卷号	15 期号:5
英文摘要	Mean sea ice thickness is a sensitive indicator of Arctic climate change and is in long-term decline despite significant interannual variability. Current thickness estimations from satellite radar altimeters employ a snow climatology for converting range measurements to sea ice thickness, but this introduces unrealistically low interannual variability and trends. When the sea ice thickness in the period 2002-2018 is calculated using new snow data with more realistic variability and trends, we find mean sea ice thickness in four of the seven marginal seas to be declining between 60 %-100 % faster than when calculated with the conventional climatology. When analysed as an aggregate area, the mean sea ice thickness in the marginal seas is in statistically significant decline for 6 of 7 winter months. This is observed despite a 76 % increase in interannual variability between the methods in the same time period. On a seasonal timescale we find that snow data exert an increasingly strong control on thickness variability over the growth season, contributing 46 % in October but 70 % by April. Higher variability and faster decline in the sea ice thickness of the marginal seas has wide implications for our understanding of the polar climate system and our predictions for its change. © 2021 Robbie D. C. Mallett et al. © 2021 International Union of Crystallography. All rights reserved.
英文关键词	climate change; ice thickness; radar altimetry; satellite data; sea ice; snow cover; Arctic; Indicator indicator
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/202372
作者单位	Centre for Polar Observation and Modelling Earth Sciences, University College London, London, United Kingdom; National Snow and Ice Data Center, University of Colorado, Boulder, CO, United States; Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; Department of Physics and Technology, UiT The Arctic University of Norway, Tromsø, Norway; Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, CO, United States
推荐引用方式 GB/T 7714	Mallett R.D.C.,Stroeve J.C.,Tsamados M.,et al. Faster decline and higher variability in the sea ice thickness of the marginal Arctic seas when accounting for dynamic snow cover[J],2021,15(5).
APA	Mallett R.D.C..,Stroeve J.C..,Tsamados M..,Landy J.C..,Willatt R..,...&Liston G.E..(2021).Faster decline and higher variability in the sea ice thickness of the marginal Arctic seas when accounting for dynamic snow cover.Cryosphere,15(5).
MLA	Mallett R.D.C.,et al."Faster decline and higher variability in the sea ice thickness of the marginal Arctic seas when accounting for dynamic snow cover".Cryosphere 15.5(2021).