High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream
The Greenland ice sheet (GIS) is losing mass at an increasing rate due to surface melt and flow acceleration in outlet glaciers. Currently, there is a large disagreement between observed and simulated ice flow, which may arise from inaccurate parameterization of basal motion, subglacial hydrology or...
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ftuniaarhuspubl:oai:pure.atira.dk:publications/011b2a79-4232-427a-8018-c94670b9ec22 2023-05-15T16:23:40+02:00 High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream Rysgaard, Soren Bendtsen, Jorgen Mortensen, John Sejr, Mikael K. 2018-01-22 application/pdf https://pure.au.dk/portal/da/publications/high-geothermal-heat-flux-in-close-proximity-to-the-northeast-greenland-ice-stream(011b2a79-4232-427a-8018-c94670b9ec22).html https://doi.org/10.1038/s41598-018-19244-x https://pure.au.dk/ws/files/121066853/s41598_018_19244_x.pdf eng eng info:eu-repo/semantics/openAccess Rysgaard , S , Bendtsen , J , Mortensen , J & Sejr , M K 2018 , ' High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream ' , Scientific Reports , vol. 8 , 1344 . https://doi.org/10.1038/s41598-018-19244-x NE GREENLAND YOUNG SOUND FRESH-WATER FJORD SHEET 74-DEGREES-N TYROLERFJORD CIRCULATION SENSITIVITY IMPACTS article 2018 ftuniaarhuspubl https://doi.org/10.1038/s41598-018-19244-x 2020-08-05T22:42:29Z The Greenland ice sheet (GIS) is losing mass at an increasing rate due to surface melt and flow acceleration in outlet glaciers. Currently, there is a large disagreement between observed and simulated ice flow, which may arise from inaccurate parameterization of basal motion, subglacial hydrology or geothermal heat sources. Recently it was suggested that there may be a hidden heat source beneath GIS caused by a higher than expected geothermal heat flux (GHF) from the Earth's interior. Here we present the first direct measurements of GHF from beneath a deep fjord basin in Northeast Greenland. Temperature and salinity time series (2005-2015) in the deep stagnant basin water are used to quantify a GHF of 93 +/- 21 mW m(-2) which confirm previous indirect estimated values below GIS. A compilation of heat flux recordings from Greenland show the existence of geothermal heat sources beneath GIS and could explain high glacial ice speed areas such as the Northeast Greenland ice stream. Article in Journal/Newspaper Greenland Ice Sheet Aarhus University: Research Greenland Tyrolerfjord ENVELOPE(-21.883,-21.883,74.517,74.517) Scientific Reports 8 1 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
NE GREENLAND YOUNG SOUND FRESH-WATER FJORD SHEET 74-DEGREES-N TYROLERFJORD CIRCULATION SENSITIVITY IMPACTS |
spellingShingle |
NE GREENLAND YOUNG SOUND FRESH-WATER FJORD SHEET 74-DEGREES-N TYROLERFJORD CIRCULATION SENSITIVITY IMPACTS Rysgaard, Soren Bendtsen, Jorgen Mortensen, John Sejr, Mikael K. High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream |
topic_facet |
NE GREENLAND YOUNG SOUND FRESH-WATER FJORD SHEET 74-DEGREES-N TYROLERFJORD CIRCULATION SENSITIVITY IMPACTS |
description |
The Greenland ice sheet (GIS) is losing mass at an increasing rate due to surface melt and flow acceleration in outlet glaciers. Currently, there is a large disagreement between observed and simulated ice flow, which may arise from inaccurate parameterization of basal motion, subglacial hydrology or geothermal heat sources. Recently it was suggested that there may be a hidden heat source beneath GIS caused by a higher than expected geothermal heat flux (GHF) from the Earth's interior. Here we present the first direct measurements of GHF from beneath a deep fjord basin in Northeast Greenland. Temperature and salinity time series (2005-2015) in the deep stagnant basin water are used to quantify a GHF of 93 +/- 21 mW m(-2) which confirm previous indirect estimated values below GIS. A compilation of heat flux recordings from Greenland show the existence of geothermal heat sources beneath GIS and could explain high glacial ice speed areas such as the Northeast Greenland ice stream. |
format |
Article in Journal/Newspaper |
author |
Rysgaard, Soren Bendtsen, Jorgen Mortensen, John Sejr, Mikael K. |
author_facet |
Rysgaard, Soren Bendtsen, Jorgen Mortensen, John Sejr, Mikael K. |
author_sort |
Rysgaard, Soren |
title |
High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream |
title_short |
High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream |
title_full |
High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream |
title_fullStr |
High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream |
title_full_unstemmed |
High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream |
title_sort |
high geothermal heat flux in close proximity to the northeast greenland ice stream |
publishDate |
2018 |
url |
https://pure.au.dk/portal/da/publications/high-geothermal-heat-flux-in-close-proximity-to-the-northeast-greenland-ice-stream(011b2a79-4232-427a-8018-c94670b9ec22).html https://doi.org/10.1038/s41598-018-19244-x https://pure.au.dk/ws/files/121066853/s41598_018_19244_x.pdf |
long_lat |
ENVELOPE(-21.883,-21.883,74.517,74.517) |
geographic |
Greenland Tyrolerfjord |
geographic_facet |
Greenland Tyrolerfjord |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Rysgaard , S , Bendtsen , J , Mortensen , J & Sejr , M K 2018 , ' High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream ' , Scientific Reports , vol. 8 , 1344 . https://doi.org/10.1038/s41598-018-19244-x |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-018-19244-x |
container_title |
Scientific Reports |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766011922550882304 |