Meltwater retention in a transect across the Greenland ice sheet
Meltwater retention by freezing is a highly climate-sensitive term in the mass budget since the cold content is directly controlled by winter climate, which is expected to change most in an anthropogenic-driven climate change. Meltwater released at the surface percolates into dry snow in a pattern w...
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ftdtupubl:oai:pure.atira.dk:publications/b99b7253-d88b-4d9e-a767-91add1db2ad7 2024-02-11T09:55:38+01:00 Meltwater retention in a transect across the Greenland ice sheet Bøggild, Carl Egede Forsberg, René Reeh, Niels 2005 https://orbit.dtu.dk/en/publications/b99b7253-d88b-4d9e-a767-91add1db2ad7 http://server.oersted.dtu.dk/publications/views/publication_details.php?id=2626 eng eng https://orbit.dtu.dk/en/publications/b99b7253-d88b-4d9e-a767-91add1db2ad7 info:eu-repo/semantics/restrictedAccess Bøggild , C E , Forsberg , R & Reeh , N 2005 , ' Meltwater retention in a transect across the Greenland ice sheet ' , Annals of Glaciology , vol. 40 , pp. 169-173 . < http://server.oersted.dtu.dk/publications/views/publication_details.php?id=2626 > /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2005 ftdtupubl 2024-01-24T23:56:17Z Meltwater retention by freezing is a highly climate-sensitive term in the mass budget since the cold content is directly controlled by winter climate, which is expected to change most in an anthropogenic-driven climate change. Meltwater released at the surface percolates into dry snow in a pattern with alternating horizontal and vertical water-flow directions, where the processes of pore refreezing (RF) (vertical flow) and superimposed ice (SI) formation (horizontal flow) occur. The flow cannot be forecasted and quantified when water first enters cold, dry snow. However, because the two processes are driven by different physical mechanisms, their potential magnitude can be estimated, which has been done in a transect at 66 degrees N. Results show that SI declines from west to east and inversely correlates with accumulation. From the total retention capacity, theoretical lowest-runoff lines were determined at similar to 1400 m a.s.l. in the west and similar to 1600 m a.s.l. in the east. Since the SI potential is high in most places and the warming from SI formation predominately occurs near to the surface, it is argued that winter cooling effectively recharges the cold content of the snow/firn/ice pack, preventing the development of isothermal conditions and subsequent runoff. However, SI formation declines over time, so an extension of the melting season could result in deeper percolation beyond the SI layer. Article in Journal/Newspaper Annals of Glaciology Greenland Ice Sheet Technical University of Denmark: DTU Orbit Greenland |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Bøggild, Carl Egede Forsberg, René Reeh, Niels Meltwater retention in a transect across the Greenland ice sheet |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Meltwater retention by freezing is a highly climate-sensitive term in the mass budget since the cold content is directly controlled by winter climate, which is expected to change most in an anthropogenic-driven climate change. Meltwater released at the surface percolates into dry snow in a pattern with alternating horizontal and vertical water-flow directions, where the processes of pore refreezing (RF) (vertical flow) and superimposed ice (SI) formation (horizontal flow) occur. The flow cannot be forecasted and quantified when water first enters cold, dry snow. However, because the two processes are driven by different physical mechanisms, their potential magnitude can be estimated, which has been done in a transect at 66 degrees N. Results show that SI declines from west to east and inversely correlates with accumulation. From the total retention capacity, theoretical lowest-runoff lines were determined at similar to 1400 m a.s.l. in the west and similar to 1600 m a.s.l. in the east. Since the SI potential is high in most places and the warming from SI formation predominately occurs near to the surface, it is argued that winter cooling effectively recharges the cold content of the snow/firn/ice pack, preventing the development of isothermal conditions and subsequent runoff. However, SI formation declines over time, so an extension of the melting season could result in deeper percolation beyond the SI layer. |
format |
Article in Journal/Newspaper |
author |
Bøggild, Carl Egede Forsberg, René Reeh, Niels |
author_facet |
Bøggild, Carl Egede Forsberg, René Reeh, Niels |
author_sort |
Bøggild, Carl Egede |
title |
Meltwater retention in a transect across the Greenland ice sheet |
title_short |
Meltwater retention in a transect across the Greenland ice sheet |
title_full |
Meltwater retention in a transect across the Greenland ice sheet |
title_fullStr |
Meltwater retention in a transect across the Greenland ice sheet |
title_full_unstemmed |
Meltwater retention in a transect across the Greenland ice sheet |
title_sort |
meltwater retention in a transect across the greenland ice sheet |
publishDate |
2005 |
url |
https://orbit.dtu.dk/en/publications/b99b7253-d88b-4d9e-a767-91add1db2ad7 http://server.oersted.dtu.dk/publications/views/publication_details.php?id=2626 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Annals of Glaciology Greenland Ice Sheet |
genre_facet |
Annals of Glaciology Greenland Ice Sheet |
op_source |
Bøggild , C E , Forsberg , R & Reeh , N 2005 , ' Meltwater retention in a transect across the Greenland ice sheet ' , Annals of Glaciology , vol. 40 , pp. 169-173 . < http://server.oersted.dtu.dk/publications/views/publication_details.php?id=2626 > |
op_relation |
https://orbit.dtu.dk/en/publications/b99b7253-d88b-4d9e-a767-91add1db2ad7 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1790598027424038912 |