High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland
The spatiotemporal distribution of freshwater runoff from the Greenland Ice Sheet (GrIS) determines the hydrographic and circulation conditions in Greenlandic fjords. The distribution of GrIS first-order atmospheric forcings, surface mass-balance (SMB), including snow/ice melt, and freshwater river...
Published in: | Arctic, Antarctic, and Alpine Research |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Taylor & Francis
2018
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Online Access: | http://hdl.handle.net/11250/2582312 https://doi.org/10.1080/15230430.2017.1415856 |
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fthsvestlandet:oai:hvlopen.brage.unit.no:11250/2582312 2024-03-03T08:39:23+00:00 High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland Mernild, Jacob Sebastian Haugaard Liston, Glen E. van As, Dirk Hasholt, Bent Yde, Jacob C. Greenland 2018 application/pdf http://hdl.handle.net/11250/2582312 https://doi.org/10.1080/15230430.2017.1415856 eng eng Taylor & Francis Mernild, S. H., Liston, G. E., van As, D., Hasholt, B., & Yde, J. C. (2018). High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussuaq, west Greenland. Arctic, Antarctic, and Alpine Research, 50(1). urn:issn:1523-0430 http://hdl.handle.net/11250/2582312 https://doi.org/10.1080/15230430.2017.1415856 cristin:1590900 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The authors. 50 Arctic, Antarctic and Alpine research 1 surface mass-balance SnowModel HydroFlow Greenland Ice Sheet freshwater runoff ERA-I VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 Journal article Peer reviewed 2018 fthsvestlandet https://doi.org/10.1080/15230430.2017.1415856 2024-02-02T12:40:35Z The spatiotemporal distribution of freshwater runoff from the Greenland Ice Sheet (GrIS) determines the hydrographic and circulation conditions in Greenlandic fjords. The distribution of GrIS first-order atmospheric forcings, surface mass-balance (SMB), including snow/ice melt, and freshwater river discharge from the Kangerlussuaq drainage catchment were simulated for the thirty-five-year period 1979/1980–2013/2014. ERA-Interim (ERA-I) products, together with the modeling software package SnowModel, were used with relatively high-resolutions of 3-h time steps and 5-km horizontal grid increments. SnowModel simulated and downscaled grid mean annual air temperature (MAAT) and SMB correspond well to point observations along a weather station transect (the K-transect). On average, simulated catchment runoff was, however, overestimated and subsequently adjusted against observed runoff. This overestimation could likely be because of missing multiyear firn processes, such as nonlinear meltwater retention, percolation blocked by ice layers, and refreezing. In the GrIS Kangerlussuaq catchment, the simulated thirty-five-year MAAT was −15.0 ± 1.4°C, with a mean 0° isotherm below 280 m a.s.l. near the ice sheet margin. At the ice sheet margin, on average, 45 percent of precipitation fell as snow. At 2,000 m a.s.l., snow constituted 98 percent of the total precipitation. At the catchment outlet of Watson River draining into the fjord Kangerlussuaq, 80 percent of the simulated runoff originated from GrIS ice melt, 15 percent from snowmelt, and 5 percent from rain. publishedVersion Article in Journal/Newspaper Antarctic and Alpine Research Arctic Greenland greenlandic Ice Sheet Kangerlussuaq Høgskulen på Vestlandet: HVL Open Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Arctic, Antarctic, and Alpine Research 50 1 |
institution |
Open Polar |
collection |
Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
topic |
surface mass-balance SnowModel HydroFlow Greenland Ice Sheet freshwater runoff ERA-I VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
spellingShingle |
surface mass-balance SnowModel HydroFlow Greenland Ice Sheet freshwater runoff ERA-I VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 Mernild, Jacob Sebastian Haugaard Liston, Glen E. van As, Dirk Hasholt, Bent Yde, Jacob C. High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland |
topic_facet |
surface mass-balance SnowModel HydroFlow Greenland Ice Sheet freshwater runoff ERA-I VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
description |
The spatiotemporal distribution of freshwater runoff from the Greenland Ice Sheet (GrIS) determines the hydrographic and circulation conditions in Greenlandic fjords. The distribution of GrIS first-order atmospheric forcings, surface mass-balance (SMB), including snow/ice melt, and freshwater river discharge from the Kangerlussuaq drainage catchment were simulated for the thirty-five-year period 1979/1980–2013/2014. ERA-Interim (ERA-I) products, together with the modeling software package SnowModel, were used with relatively high-resolutions of 3-h time steps and 5-km horizontal grid increments. SnowModel simulated and downscaled grid mean annual air temperature (MAAT) and SMB correspond well to point observations along a weather station transect (the K-transect). On average, simulated catchment runoff was, however, overestimated and subsequently adjusted against observed runoff. This overestimation could likely be because of missing multiyear firn processes, such as nonlinear meltwater retention, percolation blocked by ice layers, and refreezing. In the GrIS Kangerlussuaq catchment, the simulated thirty-five-year MAAT was −15.0 ± 1.4°C, with a mean 0° isotherm below 280 m a.s.l. near the ice sheet margin. At the ice sheet margin, on average, 45 percent of precipitation fell as snow. At 2,000 m a.s.l., snow constituted 98 percent of the total precipitation. At the catchment outlet of Watson River draining into the fjord Kangerlussuaq, 80 percent of the simulated runoff originated from GrIS ice melt, 15 percent from snowmelt, and 5 percent from rain. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Mernild, Jacob Sebastian Haugaard Liston, Glen E. van As, Dirk Hasholt, Bent Yde, Jacob C. |
author_facet |
Mernild, Jacob Sebastian Haugaard Liston, Glen E. van As, Dirk Hasholt, Bent Yde, Jacob C. |
author_sort |
Mernild, Jacob Sebastian Haugaard |
title |
High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland |
title_short |
High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland |
title_full |
High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland |
title_fullStr |
High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland |
title_full_unstemmed |
High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussaq, West Greenland |
title_sort |
high-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: kangerlussaq, west greenland |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2582312 https://doi.org/10.1080/15230430.2017.1415856 |
op_coverage |
Greenland |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Antarctic and Alpine Research Arctic Greenland greenlandic Ice Sheet Kangerlussuaq |
genre_facet |
Antarctic and Alpine Research Arctic Greenland greenlandic Ice Sheet Kangerlussuaq |
op_source |
50 Arctic, Antarctic and Alpine research 1 |
op_relation |
Mernild, S. H., Liston, G. E., van As, D., Hasholt, B., & Yde, J. C. (2018). High-resolution ice sheet surface mass-balance and spatiotemporal runoff simulations: Kangerlussuaq, west Greenland. Arctic, Antarctic, and Alpine Research, 50(1). urn:issn:1523-0430 http://hdl.handle.net/11250/2582312 https://doi.org/10.1080/15230430.2017.1415856 cristin:1590900 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The authors. |
op_doi |
https://doi.org/10.1080/15230430.2017.1415856 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
50 |
container_issue |
1 |
_version_ |
1792494903319592960 |