An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery
Space-borne remotely sensed data can provide valuable insight into cryospheric processes in remote high-latitude regions for which direct observations are limited. In this study we use synthetic aperture radar (SAR) and Landsat imagery to evaluate recent changes in the ice cover of Upper and Lower M...
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ftunivmassamh:oai:works.bepress.com:raymond_bradley-1003 2023-05-15T14:58:39+02:00 An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery Cook, Timothy L Bradley, Raymond S 2010-01-01T08:00:00Z application/pdf https://works.bepress.com/raymond_bradley/2 https://works.bepress.com/cgi/viewcontent.cgi?article=1003&context=raymond_bradley unknown SelectedWorks https://works.bepress.com/raymond_bradley/2 https://works.bepress.com/cgi/viewcontent.cgi?article=1003&context=raymond_bradley Raymond S Bradley Earth Sciences text 2010 ftunivmassamh 2022-01-09T20:39:56Z Space-borne remotely sensed data can provide valuable insight into cryospheric processes in remote high-latitude regions for which direct observations are limited. In this study we use synthetic aperture radar (SAR) and Landsat imagery to evaluate recent changes in the ice cover of Upper and Lower Murray Lakes (81°20′N, 69°30′W) on Ellesmere Island, Nunavut, Canada. These data highlight changes in ice conditions that have occurred over the past decade and provide a means for assessing the likely impacts of rising temperatures on future lake-ice conditions. Under current (1997–2007) climatic conditions the Murray Lakes average several weeks of ice-free conditions in August and early September, although in some years a partial ice cover persists throughout the year. The observed relationship between summer temperature and ice melt at Upper and Lower Murray Lakes suggests that recent warming in the High Arctic has forced the lakes near a threshold from a state characterized by perennial ice cover to the current state that includes seasonal melting of lake ice. Projected future warming will significantly increase the duration of ice free conditions on Upper and Lower Murray Lakes, with ice-out predicted to occur 13.5 ± 4.0 and 17.6 ± 5.6 days earlier, respectively, for every 1 °C increase in mean June–July temperature. Text Arctic Ellesmere Island Nunavut University of Massachusetts: ScholarWorks@UMass Amherst Arctic Canada Ellesmere Island Nunavut |
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University of Massachusetts: ScholarWorks@UMass Amherst |
op_collection_id |
ftunivmassamh |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Cook, Timothy L Bradley, Raymond S An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery |
topic_facet |
Earth Sciences |
description |
Space-borne remotely sensed data can provide valuable insight into cryospheric processes in remote high-latitude regions for which direct observations are limited. In this study we use synthetic aperture radar (SAR) and Landsat imagery to evaluate recent changes in the ice cover of Upper and Lower Murray Lakes (81°20′N, 69°30′W) on Ellesmere Island, Nunavut, Canada. These data highlight changes in ice conditions that have occurred over the past decade and provide a means for assessing the likely impacts of rising temperatures on future lake-ice conditions. Under current (1997–2007) climatic conditions the Murray Lakes average several weeks of ice-free conditions in August and early September, although in some years a partial ice cover persists throughout the year. The observed relationship between summer temperature and ice melt at Upper and Lower Murray Lakes suggests that recent warming in the High Arctic has forced the lakes near a threshold from a state characterized by perennial ice cover to the current state that includes seasonal melting of lake ice. Projected future warming will significantly increase the duration of ice free conditions on Upper and Lower Murray Lakes, with ice-out predicted to occur 13.5 ± 4.0 and 17.6 ± 5.6 days earlier, respectively, for every 1 °C increase in mean June–July temperature. |
format |
Text |
author |
Cook, Timothy L Bradley, Raymond S |
author_facet |
Cook, Timothy L Bradley, Raymond S |
author_sort |
Cook, Timothy L |
title |
An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery |
title_short |
An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery |
title_full |
An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery |
title_fullStr |
An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery |
title_full_unstemmed |
An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery |
title_sort |
analysis of past and future changes in the ice cover of two high-arctic lakes based on synthetic aperture radar (sar) and landsat imagery |
publisher |
SelectedWorks |
publishDate |
2010 |
url |
https://works.bepress.com/raymond_bradley/2 https://works.bepress.com/cgi/viewcontent.cgi?article=1003&context=raymond_bradley |
geographic |
Arctic Canada Ellesmere Island Nunavut |
geographic_facet |
Arctic Canada Ellesmere Island Nunavut |
genre |
Arctic Ellesmere Island Nunavut |
genre_facet |
Arctic Ellesmere Island Nunavut |
op_source |
Raymond S Bradley |
op_relation |
https://works.bepress.com/raymond_bradley/2 https://works.bepress.com/cgi/viewcontent.cgi?article=1003&context=raymond_bradley |
_version_ |
1766330780045279232 |