Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study
Pine Island Glacier is one of the fastest changing glaciers of the Antarctic Ice Sheet and therefore of scientific interest. The glacier holds enough ice to raise the global sea level significantly (~ 0.5 m) when fully melted. The question addressed by numerous modelling studies of the glacier focus...
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ftdoajarticles:oai:doaj.org/article:f24252a8274a4494b50dc77784a29f22 2023-05-15T13:34:50+02:00 Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study N. Wilkens J. Behrens T. Kleiner D. Rippin M. Rückamp A. Humbert 2015-04-01T00:00:00Z https://doi.org/10.5194/tc-9-675-2015 https://doaj.org/article/f24252a8274a4494b50dc77784a29f22 EN eng Copernicus Publications http://www.the-cryosphere.net/9/675/2015/tc-9-675-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-675-2015 https://doaj.org/article/f24252a8274a4494b50dc77784a29f22 The Cryosphere, Vol 9, Iss 2, Pp 675-690 (2015) Environmental sciences GE1-350 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/tc-9-675-2015 2022-12-31T10:17:21Z Pine Island Glacier is one of the fastest changing glaciers of the Antarctic Ice Sheet and therefore of scientific interest. The glacier holds enough ice to raise the global sea level significantly (~ 0.5 m) when fully melted. The question addressed by numerous modelling studies of the glacier focuses on whether the observed changes are a start of an uncontrolled and accelerating retreat. The movement of the glacier is, in the fast-flowing areas, dominated by basal motion. In modelling studies the parametrisation of the basal motion is therefore crucial. Inversion methods are commonly applied to reproduce the complex surface flow structure of Pine Island Glacier by using information of the observed surface velocity field to constrain, among other things, basal sliding. We introduce two different approaches of combining a physical parameter, the basal roughness, with basal sliding parametrisations. This way basal sliding is again connected closer to its original formulation. We show that the basal roughness is an important and helpful parameter to consider and that many features of the flow structure can be reproduced with these approaches. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Pine Island Glacier The Cryosphere Directory of Open Access Journals: DOAJ Articles Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic The Cryosphere 9 2 675 690 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 N. Wilkens J. Behrens T. Kleiner D. Rippin M. Rückamp A. Humbert Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Pine Island Glacier is one of the fastest changing glaciers of the Antarctic Ice Sheet and therefore of scientific interest. The glacier holds enough ice to raise the global sea level significantly (~ 0.5 m) when fully melted. The question addressed by numerous modelling studies of the glacier focuses on whether the observed changes are a start of an uncontrolled and accelerating retreat. The movement of the glacier is, in the fast-flowing areas, dominated by basal motion. In modelling studies the parametrisation of the basal motion is therefore crucial. Inversion methods are commonly applied to reproduce the complex surface flow structure of Pine Island Glacier by using information of the observed surface velocity field to constrain, among other things, basal sliding. We introduce two different approaches of combining a physical parameter, the basal roughness, with basal sliding parametrisations. This way basal sliding is again connected closer to its original formulation. We show that the basal roughness is an important and helpful parameter to consider and that many features of the flow structure can be reproduced with these approaches. |
format |
Article in Journal/Newspaper |
author |
N. Wilkens J. Behrens T. Kleiner D. Rippin M. Rückamp A. Humbert |
author_facet |
N. Wilkens J. Behrens T. Kleiner D. Rippin M. Rückamp A. Humbert |
author_sort |
N. Wilkens |
title |
Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study |
title_short |
Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study |
title_full |
Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study |
title_fullStr |
Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study |
title_full_unstemmed |
Thermal structure and basal sliding parametrisation at Pine Island Glacier – a 3-D full-Stokes model study |
title_sort |
thermal structure and basal sliding parametrisation at pine island glacier – a 3-d full-stokes model study |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-675-2015 https://doaj.org/article/f24252a8274a4494b50dc77784a29f22 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Pine Island Glacier The Antarctic |
geographic_facet |
Antarctic Pine Island Glacier The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Pine Island Glacier The Cryosphere |
genre_facet |
Antarc* Antarctic Ice Sheet Pine Island Glacier The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 2, Pp 675-690 (2015) |
op_relation |
http://www.the-cryosphere.net/9/675/2015/tc-9-675-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-675-2015 https://doaj.org/article/f24252a8274a4494b50dc77784a29f22 |
op_doi |
https://doi.org/10.5194/tc-9-675-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
2 |
container_start_page |
675 |
op_container_end_page |
690 |
_version_ |
1766058373023793152 |