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• W1969320838 endingPage "138" @default.
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• W1969320838 abstract "The sudden drainage of supraglacial lakes has been previously observed to initiate surface-to-bed hydrologic connections, which are capable of enhancing basal sliding, in regions of the Greenland Ice Sheet where ice thickness approaches 1 km. In this study, we develop a robust algorithm, which automatically detects and tracks individual supraglacial lakes using visible satellite imagery, to document the evolution of a population of West Greenland supraglacial lakes over ten consecutive melt seasons. Validation tests indicate that the algorithm is highly accurate: 99.0% of supraglacial lakes can be detected and tracked and 96.3% of reported lakes are true supraglacial lakes with accurate lake properties, such as lake area, and timing of formation and drainage. Investigation of the interannual evolution of supraglacial lakes in the context of annual melt intensity reveals that during more intense melt years, supraglacial lakes drain more frequently and earlier in the melt season. Additionally, the lake population extends to higher elevations during more intense melt years, exposing an increased inland area of the ice sheet to sudden lake drainage events. These observations suggest that increased surface meltwater production due to climate change will enhance the spatial extent and temporal frequency of lake drainage events. It is unclear whether this will ultimately increase or decrease the basal sliding sensitivity of interior regions of the Greenland Ice Sheet. ► Supraglacial lakes are important in studying mass loss of the Greenland Ice Sheet. ► We develop a highly-accurate algorithm to automatically track lakes in MODIS imagery. ► The lake parameters are examined in the context of in situ observations of annual melt intensity. ► Result 1: Supraglacial lakes drain more frequently and disappear earlier in warmer years. ► Result 2: Supraglacial lakes migrate to higher elevations in warmer years." @default.
• W1969320838 created "2016-06-24" @default.
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• W1969320838 date "2012-08-01" @default.
• W1969320838 modified "2023-09-29" @default.
• W1969320838 title "A decadal investigation of supraglacial lakes in West Greenland using a fully automatic detection and tracking algorithm" @default.
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• W1969320838 doi "https://doi.org/10.1016/j.rse.2012.03.020" @default.
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