Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland
This study focuses on runoff from a large sector of the Greenland Ice Sheet (GrIS) - the Kangerlussuaq drainage area, West Greenland - for the runoff observation period 2006/07 to 2007/08. SnowModel, a state-of-the-art snow-evolution modeling system, was used to simulate winter accumulation and summ...
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ftosti:oai:osti.gov:971304 2023-07-30T04:03:46+02:00 Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland Mernild, Sebastian Haugard Hasholt, Bent Van Den Broeke, Michiel Liston, Glen 2021-02-12 application/pdf http://www.osti.gov/servlets/purl/971304 https://www.osti.gov/biblio/971304 unknown http://www.osti.gov/servlets/purl/971304 https://www.osti.gov/biblio/971304 58 ABLATION CLIMATES DRAINAGE GREENLAND RUNOFF SIMULATION SNOW STORAGE VALIDATION 2021 ftosti 2023-07-11T08:48:02Z This study focuses on runoff from a large sector of the Greenland Ice Sheet (GrIS) - the Kangerlussuaq drainage area, West Greenland - for the runoff observation period 2006/07 to 2007/08. SnowModel, a state-of-the-art snow-evolution modeling system, was used to simulate winter accumulation and summer ablation processes, including runoff. Independent in situ end-of-winter snow depth and high-resolution runoff observations were used for validation of simulated accumulation and ablation processes. Runoff was modeled on both daily and hourly time steps, filling a data gap of runoff exiting part of the GrIS. Using hourly meteorological driving data instead of smoothed daily-averaged data produced more realistic meteorological conditions in relation to snow and melt threshold surface processes, and produced 6-17% higher annual cumulative runoff. The simulated runoff series yielded useful insights into the present conditions of inter-seasonal and inter-annual variability of Kangerlussuaq runoff, and provided an acceptable degree of agreement between simulated and observed runoff. The simulated spatial runoff distributions, in some areas of the GrIS terminus, were as high as 2,750 mm w.eq. of runoff for 2006/07, while only 900 mm w.eq was simulated for 2007/08. The simulated total runoff from Kangerlussuaq was 1.9 km{sup 3} for 2006/07 and 1.2 km{sup 3} for 2007/08, indicating a reduction of 35-40% caused by the climate conditions and changes in the GrIS freshwater storage. The reduction in runoff from 2006/07 to 2007/08 occurred simultaneously with the reduction in the overall pattern of satellite-derived GrIS surface melt from 2007 to 2008. Other/Unknown Material Greenland Ice Sheet Kangerlussuaq SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
58 ABLATION CLIMATES DRAINAGE GREENLAND RUNOFF SIMULATION SNOW STORAGE VALIDATION |
spellingShingle |
58 ABLATION CLIMATES DRAINAGE GREENLAND RUNOFF SIMULATION SNOW STORAGE VALIDATION Mernild, Sebastian Haugard Hasholt, Bent Van Den Broeke, Michiel Liston, Glen Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland |
topic_facet |
58 ABLATION CLIMATES DRAINAGE GREENLAND RUNOFF SIMULATION SNOW STORAGE VALIDATION |
description |
This study focuses on runoff from a large sector of the Greenland Ice Sheet (GrIS) - the Kangerlussuaq drainage area, West Greenland - for the runoff observation period 2006/07 to 2007/08. SnowModel, a state-of-the-art snow-evolution modeling system, was used to simulate winter accumulation and summer ablation processes, including runoff. Independent in situ end-of-winter snow depth and high-resolution runoff observations were used for validation of simulated accumulation and ablation processes. Runoff was modeled on both daily and hourly time steps, filling a data gap of runoff exiting part of the GrIS. Using hourly meteorological driving data instead of smoothed daily-averaged data produced more realistic meteorological conditions in relation to snow and melt threshold surface processes, and produced 6-17% higher annual cumulative runoff. The simulated runoff series yielded useful insights into the present conditions of inter-seasonal and inter-annual variability of Kangerlussuaq runoff, and provided an acceptable degree of agreement between simulated and observed runoff. The simulated spatial runoff distributions, in some areas of the GrIS terminus, were as high as 2,750 mm w.eq. of runoff for 2006/07, while only 900 mm w.eq was simulated for 2007/08. The simulated total runoff from Kangerlussuaq was 1.9 km{sup 3} for 2006/07 and 1.2 km{sup 3} for 2007/08, indicating a reduction of 35-40% caused by the climate conditions and changes in the GrIS freshwater storage. The reduction in runoff from 2006/07 to 2007/08 occurred simultaneously with the reduction in the overall pattern of satellite-derived GrIS surface melt from 2007 to 2008. |
author |
Mernild, Sebastian Haugard Hasholt, Bent Van Den Broeke, Michiel Liston, Glen |
author_facet |
Mernild, Sebastian Haugard Hasholt, Bent Van Den Broeke, Michiel Liston, Glen |
author_sort |
Mernild, Sebastian Haugard |
title |
Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland |
title_short |
Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland |
title_full |
Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland |
title_fullStr |
Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland |
title_full_unstemmed |
Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland |
title_sort |
runoff simulations from the greenland ice sheet at kangerlussuaq from 2006-2007 to 2007/08. west greenland |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/971304 https://www.osti.gov/biblio/971304 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Greenland Ice Sheet Kangerlussuaq |
genre_facet |
Greenland Ice Sheet Kangerlussuaq |
op_relation |
http://www.osti.gov/servlets/purl/971304 https://www.osti.gov/biblio/971304 |
_version_ |
1772814847881248768 |