气候变化领域集成服务门户(CCPortal): Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: Implications for ice shelf thickness

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DOI	10.5194/tc-11-2189-2017
	Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: Implications for ice shelf thickness
	Hamilton A.K.; Laval B.E.; Mueller D.R.; Vincent W.F.; Copland L.
发表日期	2017
ISSN	19940416
卷号	11 期号:5
英文摘要	Changes in the depth of the freshwater-seawater interface in epishelf lakes have been used to infer long-term changes in the minimum thickness of ice shelves; however, little is known about the dynamics of epishelf lakes and what other factors may influence their depth. Continuous observations collected between 2011 and 2014 in the Milne Fiord epishelf lake, in the Canadian Arctic, showed that the depth of the halocline varied seasonally by up to 3.3m, which was comparable to interannual variability. The seasonal depth variation was controlled by the magnitude of surface meltwater inflow and the hydraulics of the inferred outflow pathway, a narrow basal channel in the Milne Ice Shelf. When seasonal variation and an episodic mixing of the halocline were accounted for, long-term records of depth indicated there was no significant change in thickness of ice along the basal channel from 1983 to 2004, followed by a period of steady thinning at 0.50ma-1 between 2004 and 2011. Rapid thinning at 1.15ma-1 then occurred from 2011 to 2014, corresponding to a period of warming regional air temperatures. Continued warming is expected to lead to the breakup of the ice shelf and the imminent loss of the last known epishelf lake in the Arctic. © Author(s) 2017.
学科领域	air temperature; annual variation; estuarine front; halocline; ice lake; ice shelf; long-term change; meltwater; outflow; seasonal variation; Arctic; Canada; Canadian Arctic
语种	英语
scopus关键词	air temperature; annual variation; estuarine front; halocline; ice lake; ice shelf; long-term change; meltwater; outflow; seasonal variation; Arctic; Canada; Canadian Arctic
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/119332
作者单位	Department of Civil Engineering, University of British Columbia, Vancouver, BC, Canada; Department of Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada; Department of Biology and Centre for Northern Studies (CEN), Université Laval, Quebec City, QC, Canada; Department of Geography, Environment, and Geomatics, University of Ottawa, Ottawa, ON, Canada
推荐引用方式 GB/T 7714	Hamilton A.K.,Laval B.E.,Mueller D.R.,et al. Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: Implications for ice shelf thickness[J],2017,11(5).
APA	Hamilton A.K.,Laval B.E.,Mueller D.R.,Vincent W.F.,&Copland L..(2017).Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: Implications for ice shelf thickness.Cryosphere,11(5).
MLA	Hamilton A.K.,et al."Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: Implications for ice shelf thickness".Cryosphere 11.5(2017).