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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ftpubmed:oai:pubmedcentral.nih.gov:5777987 2023-05-15T16:23:59+02:00 High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream Rysgaard, Søren Bendtsen, Jørgen Mortensen, John Sejr, Mikael K. 2018-01-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5777987/ http://www.ncbi.nlm.nih.gov/pubmed/29358631 https://doi.org/10.1038/s41598-018-19244-x en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5777987/ http://www.ncbi.nlm.nih.gov/pubmed/29358631 http://dx.doi.org/10.1038/s41598-018-19244-x © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2018 ftpubmed https://doi.org/10.1038/s41598-018-19244-x 2018-02-04T01:27:37Z 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. Text Greenland Ice Sheet PubMed Central (PMC) Greenland Scientific Reports 8 1 |
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Article Rysgaard, Søren Bendtsen, Jørgen Mortensen, John Sejr, Mikael K. High geothermal heat flux in close proximity to the Northeast Greenland Ice Stream |
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Article |
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 |
Text |
author |
Rysgaard, Søren Bendtsen, Jørgen Mortensen, John Sejr, Mikael K. |
author_facet |
Rysgaard, Søren Bendtsen, Jørgen Mortensen, John Sejr, Mikael K. |
author_sort |
Rysgaard, Søren |
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 |
publisher |
Nature Publishing Group UK |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5777987/ http://www.ncbi.nlm.nih.gov/pubmed/29358631 https://doi.org/10.1038/s41598-018-19244-x |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5777987/ http://www.ncbi.nlm.nih.gov/pubmed/29358631 http://dx.doi.org/10.1038/s41598-018-19244-x |
op_rights |
© The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41598-018-19244-x |
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Scientific Reports |
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