DOI: 10.5194/tc-10-941-2016
Scopus记录号: 2-s2.0-84969670061
论文题名: Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations
作者: Surdu C ; M ; , Duguay C ; R ; , Prieto D ; F
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 3 起始页码: 941
结束页码: 960
语种: 英语
英文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75148
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
Surdu C,M,, Duguay C,et al. Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations[J]. Cryosphere,2016-01-01,10(3)