气候变化领域集成服务门户(CCPortal): Winter sea ice export from the Laptev Sea preconditions the local summer sea ice cover and fast ice decay

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DOI	10.5194/tc-11-2383-2017
	Winter sea ice export from the Laptev Sea preconditions the local summer sea ice cover and fast ice decay
	Itkin P.; Krumpen T.
发表日期	2017
ISSN	19940416
卷号	11 期号:5
英文摘要	Ice retreat in the eastern Eurasian Arctic is a consequence of atmospheric and oceanic processes and regional feedback mechanisms acting on the ice cover, both in winter and summer. A correct representation of these processes in numerical models is important, since it will improve predictions of sea ice anomalies along the Northeast Passage and beyond. In this study, we highlight the importance of winter ice dynamics for local summer sea ice anomalies in thickness, volume and extent. By means of airborne sea ice thickness surveys made over pack ice areas in the south-eastern Laptev Sea, we show that years of offshore-directed sea ice transport have a thinning effect on the late-winter sea ice cover. To confirm the preconditioning effect of enhanced offshore advection in late winter on the summer sea ice cover, we perform a sensitivity study using a numerical model. Results verify that the preconditioning effect plays a bigger role for the regional ice extent. Furthermore, they indicate an increase in volume export from the Laptev Sea as a consequence of enhanced offshore advection, which has far-reaching consequences for the entire Arctic sea ice mass balance. Moreover we show that ice dynamics in winter not only preconditions local summer ice extent, but also accelerate fast-ice decay.
学科领域	advection; ice cover; ice retreat; mass balance; numerical model; pack ice; sea ice; summer; Arctic Ocean; Laptev Sea
语种	英语
scopus关键词	advection; ice cover; ice retreat; mass balance; numerical model; pack ice; sea ice; summer; Arctic Ocean; Laptev Sea
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/119323
作者单位	Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany; Norwegian Polar Institute, Tromsø, Norway; Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, Norway
推荐引用方式 GB/T 7714	Itkin P.,Krumpen T.. Winter sea ice export from the Laptev Sea preconditions the local summer sea ice cover and fast ice decay[J],2017,11(5).
APA	Itkin P.,&Krumpen T..(2017).Winter sea ice export from the Laptev Sea preconditions the local summer sea ice cover and fast ice decay.Cryosphere,11(5).
MLA	Itkin P.,et al."Winter sea ice export from the Laptev Sea preconditions the local summer sea ice cover and fast ice decay".Cryosphere 11.5(2017).