气候变化领域集成服务门户(CCPortal): Impact of warming shelf waters on ice mélange and terminus retreat at a large SE Greenland glacier

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DOI	10.5194/tc-13-2303-2019
	Impact of warming shelf waters on ice mélange and terminus retreat at a large SE Greenland glacier
	Bevan S.L.; Luckman A.J.; Benn D.I.; Cowton T.; Todd J.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2303
结束页码	2315
卷号	13 期号:9
英文摘要	By the end of 2018 Kangerlussuaq Glacier in southeast Greenland had retreated further inland than at any time in the past 80 years and its terminus was approaching a region of retrograde bed slope from where further rapid retreat would have been inevitable. Here we show that the retreat occurred because the glacier failed to advance during the winters of 2016/17 and 2017/18 owing to a weakened proglacial mélange. This mixture of sea ice and icebergs is normally rigid enough to inhibit calving in winter, but for 2 consecutive years it repeatedly collapsed, allowing Kangerlussuaq Glacier to continue to calve all year round. The mélange break-ups followed the establishment of anomalously warm surface water on the continental shelf during 2016, which likely penetrated the fjord. As calving continued uninterrupted from summer 2016 to the end of 2018 the glacier accelerated by 35% and thinned by 35m. These observations demonstrate the importance of near-surface ocean temperatures in tidewater glacier stability and show that it is not only deep-ocean warming that can lead to glacier retreat. During winter 2019 a persistent mélange reformed and the glacier readvanced by 3.5km. © Author(s) 2019.
语种	英语
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118844
作者单位	Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom; University of St.Andrews, College Gate, St.Andrews, KY16 9AJ, United Kingdom
推荐引用方式 GB/T 7714	Bevan S.L.,Luckman A.J.,Benn D.I.,et al. Impact of warming shelf waters on ice mélange and terminus retreat at a large SE Greenland glacier[J],2019,13(9).
APA	Bevan S.L.,Luckman A.J.,Benn D.I.,Cowton T.,&Todd J..(2019).Impact of warming shelf waters on ice mélange and terminus retreat at a large SE Greenland glacier.The Cryosphere,13(9).
MLA	Bevan S.L.,et al."Impact of warming shelf waters on ice mélange and terminus retreat at a large SE Greenland glacier".The Cryosphere 13.9(2019).