Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland
Geothermal heat sources beneath glaciers and ice caps influence local ice-dynamics and mass balance, but also control ice surface depression evolution as well as subglacial water reservoir dynamics. Resulting jökulhlaups (i.e. glacier lake outburst floods) impose danger to people and infrastructure,...
Main Authors: | , , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-2023-101 https://tc.copernicus.org/preprints/tc-2023-101/ |
id |
ftcopernicus:oai:publications.copernicus.org:tcd112808 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:tcd112808 2023-08-20T04:06:42+02:00 Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland Jarosch, Alexander H. Magnússon, Eyjólfur Hannesdóttir, Krista Belart, Joaquín M. C. Pálsson, Finnur 2023-07-27 application/pdf https://doi.org/10.5194/tc-2023-101 https://tc.copernicus.org/preprints/tc-2023-101/ eng eng doi:10.5194/tc-2023-101 https://tc.copernicus.org/preprints/tc-2023-101/ eISSN: 1994-0424 Text 2023 ftcopernicus https://doi.org/10.5194/tc-2023-101 2023-07-31T16:24:16Z Geothermal heat sources beneath glaciers and ice caps influence local ice-dynamics and mass balance, but also control ice surface depression evolution as well as subglacial water reservoir dynamics. Resulting jökulhlaups (i.e. glacier lake outburst floods) impose danger to people and infrastructure, especially in Iceland, where they are closely monitored. Due to hundreds of meters of ice, direct measurements of heat source strength and extent are not possible. We present an indirect measurement method which utilizes ice flow simulations and glacier surface data, such as surface mass balance and surface depression evolution. Heat source locations can be inferred accurately to simulation grid scales; heat source strength and spatial distributions are also well quantified. Our methods are applied to Mýrdalsjökull ice cap in Iceland, where we are able to refine previous heat source estimates. Text glacier Ice cap Iceland Mýrdalsjökull Copernicus Publications: E-Journals Mýrdalsjökull ENVELOPE(-19.174,-19.174,63.643,63.643) |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Geothermal heat sources beneath glaciers and ice caps influence local ice-dynamics and mass balance, but also control ice surface depression evolution as well as subglacial water reservoir dynamics. Resulting jökulhlaups (i.e. glacier lake outburst floods) impose danger to people and infrastructure, especially in Iceland, where they are closely monitored. Due to hundreds of meters of ice, direct measurements of heat source strength and extent are not possible. We present an indirect measurement method which utilizes ice flow simulations and glacier surface data, such as surface mass balance and surface depression evolution. Heat source locations can be inferred accurately to simulation grid scales; heat source strength and spatial distributions are also well quantified. Our methods are applied to Mýrdalsjökull ice cap in Iceland, where we are able to refine previous heat source estimates. |
format |
Text |
author |
Jarosch, Alexander H. Magnússon, Eyjólfur Hannesdóttir, Krista Belart, Joaquín M. C. Pálsson, Finnur |
spellingShingle |
Jarosch, Alexander H. Magnússon, Eyjólfur Hannesdóttir, Krista Belart, Joaquín M. C. Pálsson, Finnur Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland |
author_facet |
Jarosch, Alexander H. Magnússon, Eyjólfur Hannesdóttir, Krista Belart, Joaquín M. C. Pálsson, Finnur |
author_sort |
Jarosch, Alexander H. |
title |
Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland |
title_short |
Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland |
title_full |
Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland |
title_fullStr |
Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland |
title_full_unstemmed |
Geothermal heat source estimations through ice flow modelling at Mýrdalsjökull, Iceland |
title_sort |
geothermal heat source estimations through ice flow modelling at mýrdalsjökull, iceland |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-2023-101 https://tc.copernicus.org/preprints/tc-2023-101/ |
long_lat |
ENVELOPE(-19.174,-19.174,63.643,63.643) |
geographic |
Mýrdalsjökull |
geographic_facet |
Mýrdalsjökull |
genre |
glacier Ice cap Iceland Mýrdalsjökull |
genre_facet |
glacier Ice cap Iceland Mýrdalsjökull |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-2023-101 https://tc.copernicus.org/preprints/tc-2023-101/ |
op_doi |
https://doi.org/10.5194/tc-2023-101 |
_version_ |
1774717987942563840 |