气候变化领域集成服务门户(CCPortal): Atmospheric Warming Drives Growth in Arctic Sea Ice: A Key Role for Snow

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DOI	10.1029/2020GL090236
	Atmospheric Warming Drives Growth in Arctic Sea Ice: A Key Role for Snow
	Bigdeli A.; Nguyen A.T.; Pillar H.R.; Ocaña V.; Heimbach P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	A number of feedbacks regulate the response of Arctic sea ice to local atmospheric warming. Using a realistic coupled ocean-sea ice model and its adjoint, we isolate a mechanism by which significant ice growth at the end of the melt season may occur as a lagged response to Arctic atmospheric warming. A series of perturbation simulations informed by adjoint model-derived sensitivity patterns reveal the enhanced ice growth to be accompanied by a reduction of snow thickness on the ice pack. Detailed analysis of ocean-ice-snow heat budgets confirms the essential role of the reduced snow thickness for persistence and delayed overshoot of ice growth. The underlying mechanism is a snow-melt-conductivity feedback, wherein atmosphere-driven snow melt leads to a larger conductive ocean heat loss through the overlying ice layer. Our results highlight the need for accurate observations of snow thickness to constrain climate models and to initialize sea ice forecasts. ©2020. The Authors.
英文关键词	Climate models; Sea ice; Snowfall measurement; Adjoint models; Arctic sea ice; Atmospheric warming; Heat budget; Ice forecasts; Ocean heat; Ocean-sea ice; Snow thickness; Snow; climate feedback; heat budget; heat flow; hydraulic conductivity; ice thickness; persistence; perturbation; sea ice; warming; Arctic Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169554
作者单位	Oden Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX, United States; Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Institute for Geophysics, University of Texas at Austin, Austin, TX, United States
推荐引用方式 GB/T 7714	Bigdeli A.,Nguyen A.T.,Pillar H.R.,et al. Atmospheric Warming Drives Growth in Arctic Sea Ice: A Key Role for Snow[J],2020,47(20).
APA	Bigdeli A.,Nguyen A.T.,Pillar H.R.,Ocaña V.,&Heimbach P..(2020).Atmospheric Warming Drives Growth in Arctic Sea Ice: A Key Role for Snow.Geophysical Research Letters,47(20).
MLA	Bigdeli A.,et al."Atmospheric Warming Drives Growth in Arctic Sea Ice: A Key Role for Snow".Geophysical Research Letters 47.20(2020).