气候变化领域集成服务门户(CCPortal): The 2017 Reversal of the Beaufort Gyre: Can Dynamic Thickening of a Seasonal Ice Cover During a Reversal Limit Summer Ice Melt in the Beaufort Sea?

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DOI	10.1029/2020JC016796
	The 2017 Reversal of the Beaufort Gyre: Can Dynamic Thickening of a Seasonal Ice Cover During a Reversal Limit Summer Ice Melt in the Beaufort Sea?
	Babb D.G.; Landy J.C.; Lukovich J.V.; Haas C.; Hendricks S.; Barber D.G.; Galley R.J.
发表日期	2020
ISSN	21699275
卷号	125 期号:12
英文摘要	During winter 2017, the semipermanent Beaufort High collapsed and the anticyclonic Beaufort Gyre reversed. The reversal drove eastward ice motion through the Western Arctic, causing sea ice to converge against Banks Island, and halted the circulation of multiyear sea ice via the gyre, preventing its replenishment in the Beaufort Sea. Prior to the reversal, an anomalously thin seasonal ice cover had formed in the Beaufort following ice-free conditions during September 2016. With the onset of the reversal in January 2017, convergence drove uncharacteristic dynamic thickening during winter. By the end of March, despite seasonal ice comprising 97% of the ice cover, the reversal created the thickest, roughest, and most voluminous regional ice cover of the CryoSat-2 record. Within the Beaufort Sea, previous work has shown that winter ice export can precondition the region for increased summer ice melt, but that a short reversal during April 2013 contributed to a reduction in summer ice loss. Hence, the deformed ice cover at the end of winter 2017 could be expected to limit summer melt. In spite of this, the Beaufort ice cover fell to its fourth lowest September area as the gyre re-established during April and divergent ice drift broke up the pack, negating the reversal's earlier preconditioning. Our work highlights that dynamic winter thickening of a regional sea ice cover, for instance during a gyre reversal, offers the potential to limit summer ice loss, but that dynamic forcing during spring dictates whether this conditioning carries through to the melt season. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Beaufort Gyre; sea ice; sea ice dynamics
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186543
作者单位	Centre for Earth Observation Science, University of Manitoba, Winnipeg, MB, Canada; Bristol Glaciology Centre, University of Bristol, Bristol, United Kingdom; Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany
推荐引用方式 GB/T 7714	Babb D.G.,Landy J.C.,Lukovich J.V.,et al. The 2017 Reversal of the Beaufort Gyre: Can Dynamic Thickening of a Seasonal Ice Cover During a Reversal Limit Summer Ice Melt in the Beaufort Sea?[J],2020,125(12).
APA	Babb D.G..,Landy J.C..,Lukovich J.V..,Haas C..,Hendricks S..,...&Galley R.J..(2020).The 2017 Reversal of the Beaufort Gyre: Can Dynamic Thickening of a Seasonal Ice Cover During a Reversal Limit Summer Ice Melt in the Beaufort Sea?.Journal of Geophysical Research: Oceans,125(12).
MLA	Babb D.G.,et al."The 2017 Reversal of the Beaufort Gyre: Can Dynamic Thickening of a Seasonal Ice Cover During a Reversal Limit Summer Ice Melt in the Beaufort Sea?".Journal of Geophysical Research: Oceans 125.12(2020).