Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway
Abstract The Jostedalsbreen ice cap is mainland Europe's largest ice cap and accommodates 20% (458 km 2 in 2019) of the total glacier area of mainland Norway. Jostedalsbreen and its meltwater contribute to global sea-level rise and to local water management, hydropower and tourism economies and...
Published in: | Annals of Glaciology |
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Language: | English |
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Cambridge University Press (CUP)
2023
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Online Access: | http://dx.doi.org/10.1017/aog.2023.70 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000708 |
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crcambridgeupr:10.1017/aog.2023.70 2024-06-09T07:38:30+00:00 Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway Andreassen, Liss M. Robson, Benjamin A. Sjursen, Kamilla H. Elvehøy, Hallgeir Kjøllmoen, Bjarne Carrivick, Jonathan L. 2023 http://dx.doi.org/10.1017/aog.2023.70 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000708 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Annals of Glaciology volume 64, issue 90, page 26-43 ISSN 0260-3055 1727-5644 journal-article 2023 crcambridgeupr https://doi.org/10.1017/aog.2023.70 2024-05-15T12:59:19Z Abstract The Jostedalsbreen ice cap is mainland Europe's largest ice cap and accommodates 20% (458 km 2 in 2019) of the total glacier area of mainland Norway. Jostedalsbreen and its meltwater contribute to global sea-level rise and to local water management, hydropower and tourism economies and livelihoods. In this study, we construct a digital terrain model (DTM) of the ice cap from 1966 aerial photographs, which by comparing to an airborne LiDAR DTM from 2020, we compute changes in surface elevation and geodetic mass balances. The area mapped in both surveys cover about 3/4 of the ice cap area and 49 of 82 glaciers. The measured glacier area has decreased from 363.4 km 2 in 1966 to 332.9 km 2 in 2019, i.e. a change of −30 km 2 or −8.4% (−0.16% a −1 ), which is in line with the percentage reduction in area for Jostedalsbreen as a whole. The mean geodetic mass balance over the 49 glaciers was −0.15 ± 0.01 m w.e. a −1 , however, large variability is evident between glaciers, e.g. Nigardsbreen (−0.05 m w.e. a −1 ), Austdalsbreen (−0.28 m w.e. a −1 ) and Tunsbergdalsbreen (−0.36 m w.e. a −1 ) confirming differences also found by the glaciological records for Nigardsbreen and Austdalsbreen. Article in Journal/Newspaper Annals of Glaciology glacier Ice cap Cambridge University Press Norway Annals of Glaciology 64 90 26 43 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The Jostedalsbreen ice cap is mainland Europe's largest ice cap and accommodates 20% (458 km 2 in 2019) of the total glacier area of mainland Norway. Jostedalsbreen and its meltwater contribute to global sea-level rise and to local water management, hydropower and tourism economies and livelihoods. In this study, we construct a digital terrain model (DTM) of the ice cap from 1966 aerial photographs, which by comparing to an airborne LiDAR DTM from 2020, we compute changes in surface elevation and geodetic mass balances. The area mapped in both surveys cover about 3/4 of the ice cap area and 49 of 82 glaciers. The measured glacier area has decreased from 363.4 km 2 in 1966 to 332.9 km 2 in 2019, i.e. a change of −30 km 2 or −8.4% (−0.16% a −1 ), which is in line with the percentage reduction in area for Jostedalsbreen as a whole. The mean geodetic mass balance over the 49 glaciers was −0.15 ± 0.01 m w.e. a −1 , however, large variability is evident between glaciers, e.g. Nigardsbreen (−0.05 m w.e. a −1 ), Austdalsbreen (−0.28 m w.e. a −1 ) and Tunsbergdalsbreen (−0.36 m w.e. a −1 ) confirming differences also found by the glaciological records for Nigardsbreen and Austdalsbreen. |
format |
Article in Journal/Newspaper |
author |
Andreassen, Liss M. Robson, Benjamin A. Sjursen, Kamilla H. Elvehøy, Hallgeir Kjøllmoen, Bjarne Carrivick, Jonathan L. |
spellingShingle |
Andreassen, Liss M. Robson, Benjamin A. Sjursen, Kamilla H. Elvehøy, Hallgeir Kjøllmoen, Bjarne Carrivick, Jonathan L. Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway |
author_facet |
Andreassen, Liss M. Robson, Benjamin A. Sjursen, Kamilla H. Elvehøy, Hallgeir Kjøllmoen, Bjarne Carrivick, Jonathan L. |
author_sort |
Andreassen, Liss M. |
title |
Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway |
title_short |
Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway |
title_full |
Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway |
title_fullStr |
Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway |
title_full_unstemmed |
Spatio-temporal variability in geometry and geodetic mass balance of Jostedalsbreen ice cap, Norway |
title_sort |
spatio-temporal variability in geometry and geodetic mass balance of jostedalsbreen ice cap, norway |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/aog.2023.70 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000708 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Annals of Glaciology glacier Ice cap |
genre_facet |
Annals of Glaciology glacier Ice cap |
op_source |
Annals of Glaciology volume 64, issue 90, page 26-43 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2023.70 |
container_title |
Annals of Glaciology |
container_volume |
64 |
container_issue |
90 |
container_start_page |
26 |
op_container_end_page |
43 |
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1801373275936260096 |