Application of a minimal glacier model to Hansbreen, Svalbard
Hansbreen is a well studied tidewater glacier in the southwestern part of Svalbard, currently about 16 km long. Since the end of the 19th century it has been retreating over a distance of 2.7 km. In this paper the global dynamics of Hansbreen are studied with a minimal glacier model, in which the ic...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:243dde4db94340b28ac8efe52bb10ce3 2023-05-15T16:22:10+02:00 Application of a minimal glacier model to Hansbreen, Svalbard J. Oerlemans J. Jania L. Kolondra 2011-01-01 https://doi.org/10.5194/tc-5-1-2011 http://www.the-cryosphere.net/5/1/2011/tc-5-1-2011.pdf https://doaj.org/article/243dde4db94340b28ac8efe52bb10ce3 en eng Copernicus Publications doi:10.5194/tc-5-1-2011 1994-0416 1994-0424 http://www.the-cryosphere.net/5/1/2011/tc-5-1-2011.pdf https://doaj.org/article/243dde4db94340b28ac8efe52bb10ce3 undefined The Cryosphere, Vol 5, Iss 1, Pp 1-11 (2011) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.5194/tc-5-1-2011 2023-01-22T19:11:20Z Hansbreen is a well studied tidewater glacier in the southwestern part of Svalbard, currently about 16 km long. Since the end of the 19th century it has been retreating over a distance of 2.7 km. In this paper the global dynamics of Hansbreen are studied with a minimal glacier model, in which the ice mechanics are strongly parameterised and a simple law for iceberg calving is used. The model is calibrated by reconstructing a climate history in such a way that observed and simulated glacier length match. In addition, the calving law is tuned to reproduce the observed mean calving flux for the period 2000–2008. Equilibrium states are studied for a wide range of values of the equilibrium line altitude. The dynamics of the glacier are strongly nonlinear. The height-mass balance feedback and the water depth-calving flux feedback give rise to cusp catastrophes in the system. For the present climatic conditions Hansbreen cannot survive. Depending on the imposed climate change scenario, in AD 2100 Hansbreen is predicted to have a length between 10 and 12 km. The corresponding decrease in ice volume (relative to the volume in AD 2000) is 45 to 65%. Finally the late-Holocene history of Hansbreen is considered. We quote evidence from dated peat samples that Hansbreen did not exist during the Holocene Climatic Optimum. We speculate that at the end of the mid-Holocene Climatic Optimum Hansbreen could advance because the glacier bed was at least 50 m higher than today, and because the tributary glaciers on the western side may have supplied a significant amount of mass to the main stream. The excavation of the overdeepening and the formation of the shoal at the glacier terminus probably took place during the Little Ice Age. Article in Journal/Newspaper glacier Svalbard The Cryosphere Tidewater Unknown Hansbreen ENVELOPE(15.650,15.650,77.075,77.075) Svalbard The Cryosphere 5 1 1 11 |
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fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir J. Oerlemans J. Jania L. Kolondra Application of a minimal glacier model to Hansbreen, Svalbard |
topic_facet |
geo envir |
description |
Hansbreen is a well studied tidewater glacier in the southwestern part of Svalbard, currently about 16 km long. Since the end of the 19th century it has been retreating over a distance of 2.7 km. In this paper the global dynamics of Hansbreen are studied with a minimal glacier model, in which the ice mechanics are strongly parameterised and a simple law for iceberg calving is used. The model is calibrated by reconstructing a climate history in such a way that observed and simulated glacier length match. In addition, the calving law is tuned to reproduce the observed mean calving flux for the period 2000–2008. Equilibrium states are studied for a wide range of values of the equilibrium line altitude. The dynamics of the glacier are strongly nonlinear. The height-mass balance feedback and the water depth-calving flux feedback give rise to cusp catastrophes in the system. For the present climatic conditions Hansbreen cannot survive. Depending on the imposed climate change scenario, in AD 2100 Hansbreen is predicted to have a length between 10 and 12 km. The corresponding decrease in ice volume (relative to the volume in AD 2000) is 45 to 65%. Finally the late-Holocene history of Hansbreen is considered. We quote evidence from dated peat samples that Hansbreen did not exist during the Holocene Climatic Optimum. We speculate that at the end of the mid-Holocene Climatic Optimum Hansbreen could advance because the glacier bed was at least 50 m higher than today, and because the tributary glaciers on the western side may have supplied a significant amount of mass to the main stream. The excavation of the overdeepening and the formation of the shoal at the glacier terminus probably took place during the Little Ice Age. |
format |
Article in Journal/Newspaper |
author |
J. Oerlemans J. Jania L. Kolondra |
author_facet |
J. Oerlemans J. Jania L. Kolondra |
author_sort |
J. Oerlemans |
title |
Application of a minimal glacier model to Hansbreen, Svalbard |
title_short |
Application of a minimal glacier model to Hansbreen, Svalbard |
title_full |
Application of a minimal glacier model to Hansbreen, Svalbard |
title_fullStr |
Application of a minimal glacier model to Hansbreen, Svalbard |
title_full_unstemmed |
Application of a minimal glacier model to Hansbreen, Svalbard |
title_sort |
application of a minimal glacier model to hansbreen, svalbard |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/tc-5-1-2011 http://www.the-cryosphere.net/5/1/2011/tc-5-1-2011.pdf https://doaj.org/article/243dde4db94340b28ac8efe52bb10ce3 |
long_lat |
ENVELOPE(15.650,15.650,77.075,77.075) |
geographic |
Hansbreen Svalbard |
geographic_facet |
Hansbreen Svalbard |
genre |
glacier Svalbard The Cryosphere Tidewater |
genre_facet |
glacier Svalbard The Cryosphere Tidewater |
op_source |
The Cryosphere, Vol 5, Iss 1, Pp 1-11 (2011) |
op_relation |
doi:10.5194/tc-5-1-2011 1994-0416 1994-0424 http://www.the-cryosphere.net/5/1/2011/tc-5-1-2011.pdf https://doaj.org/article/243dde4db94340b28ac8efe52bb10ce3 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-5-1-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
11 |
_version_ |
1766010135021355008 |