Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations
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...
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ftcopernicus:oai:publications.copernicus.org:tc32027 2023-05-15T14:28:57+02:00 Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations Surdu, Cristina M. Duguay, Claude R. Fernández Prieto, Diego 2018-09-27 application/pdf https://doi.org/10.5194/tc-10-941-2016 https://tc.copernicus.org/articles/10/941/2016/ eng eng doi:10.5194/tc-10-941-2016 https://tc.copernicus.org/articles/10/941/2016/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tc-10-941-2016 2020-07-20T16:24:09Z 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 km 2 , 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. Text Arctic Archipelago Arctic Canadian Arctic Archipelago Lake Hazen polar desert Copernicus Publications: E-Journals Arctic Asar ENVELOPE(134.033,134.033,68.667,68.667) Canadian Arctic Archipelago Lake Hazen ENVELOPE(-71.017,-71.017,81.797,81.797) The Cryosphere 10 3 941 960 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
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 km 2 , 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. |
format |
Text |
author |
Surdu, Cristina M. Duguay, Claude R. Fernández Prieto, Diego |
spellingShingle |
Surdu, Cristina M. Duguay, Claude R. Fernández Prieto, Diego Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations |
author_facet |
Surdu, Cristina M. Duguay, Claude R. Fernández Prieto, Diego |
author_sort |
Surdu, Cristina M. |
title |
Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations |
title_short |
Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations |
title_full |
Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations |
title_fullStr |
Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations |
title_full_unstemmed |
Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations |
title_sort |
evidence of recent changes in the ice regime of lakes in the canadian high arctic from spaceborne satellite observations |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-10-941-2016 https://tc.copernicus.org/articles/10/941/2016/ |
long_lat |
ENVELOPE(134.033,134.033,68.667,68.667) ENVELOPE(-71.017,-71.017,81.797,81.797) |
geographic |
Arctic Asar Canadian Arctic Archipelago Lake Hazen |
geographic_facet |
Arctic Asar Canadian Arctic Archipelago Lake Hazen |
genre |
Arctic Archipelago Arctic Canadian Arctic Archipelago Lake Hazen polar desert |
genre_facet |
Arctic Archipelago Arctic Canadian Arctic Archipelago Lake Hazen polar desert |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-10-941-2016 https://tc.copernicus.org/articles/10/941/2016/ |
op_doi |
https://doi.org/10.5194/tc-10-941-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
3 |
container_start_page |
941 |
op_container_end_page |
960 |
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1766303073343373312 |