气候变化领域集成服务门户(CCPortal): Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations

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DOI	10.5194/tc-10-941-2016
	Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations
	Surdu C.M.; Duguay C.R.; Prieto D.F.
发表日期	2016
ISSN	19940416
卷号	10 期号:3
英文摘要	Arctic lakes, through their ice cover phenology, are a key indicator of climatic changes that the high-latitude environment is experiencing. In the case of lakes in the Canadian Arctic Archipelago (CAA), many of which are ice covered more than 10 months per year, warmer temperatures could result in ice regime shifts. Within the dominant polar-desert environment, small local warmer areas have been identified. These relatively small regions - polar oases - with longer growing seasons and greater biological productivity and diversity are secluded from the surrounding barren polar desert. The ice regimes of 11 lakes located in both polar-desert and polar-oasis environments, with surface areas between 4 and 542 km2, many of unknown bathymetry, were documented. In order to investigate the response of ice cover of lakes in the CAA to climate conditions during recent years, a 15-year time series (1997-2011) of RADARSAT-1/2 ScanSAR Wide Swath, ASAR Wide Swath, and Landsat acquisitions were analyzed. Results show that melt onset occurred earlier for all observed lakes. With the exception of Lower Murray Lake, all lakes experienced earlier summer ice minimum and water-clear-of-ice (WCI) dates, with greater changes being observed for polar-oasis lakes (9-24 days earlier WCI dates for lakes located in polar oases and 2-20 days earlier WCI dates for polar-desert lakes). Additionally, results suggest that some lakes may be transitioning from a perennial/multiyear to a seasonal ice regime, with only a few lakes maintaining a multiyear ice cover on occasional years. Aside Lake Hazen and Murray Lakes, which preserved their ice cover during the summer of 2009, no residual ice was observed on any of the other lakes from 2007 to 2011. © Author(s) 2016.
学科领域	biodiversity; biological production; climate change; climate conditions; growing season; ice cover; Landsat; phenology; RADARSAT; SIR; surface area; time series; Canada; Canadian Arctic; Ellesmere Island; Lake Hazen; Murray Lake; Nunavut; Queen Elizabeth Islands
语种	英语
scopus关键词	biodiversity; biological production; climate change; climate conditions; growing season; ice cover; Landsat; phenology; RADARSAT; SIR; surface area; time series; Canada; Canadian Arctic; Ellesmere Island; Lake Hazen; Murray Lake; Nunavut; Queen Elizabeth Islands
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/119652
作者单位	Earth Observation Science, Applications and Future Technologies Department, European Space Agency (ESA), European Space Research Institute (ESRIN), Frascati, Rome, Italy; Department of Geography and Environmental Management and Interdisciplinary Centre on Climate Change, University of Waterloo, Waterloo, ON, Canada
推荐引用方式 GB/T 7714	Surdu C.M.,Duguay C.R.,Prieto D.F.. Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations[J],2016,10(3).
APA	Surdu C.M.,Duguay C.R.,&Prieto D.F..(2016).Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations.Cryosphere,10(3).
MLA	Surdu C.M.,et al."Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations".Cryosphere 10.3(2016).