Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions
The evolution of the Antarctic ice sheet is highly affected by small scale topographic features that arise at the ice sheet margin where the ice flow towards the ocean ice channelized into ice streams and outlet glaciers. In general the ice sheet margin is characterized by pronounced basal relief an...
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ftawi:oai:epic.awi.de:42761 2023-05-15T13:40:27+02:00 Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions Kleiner, Thomas Humbert, Angelika 2012-04 application/pdf https://epic.awi.de/id/eprint/42761/ https://epic.awi.de/id/eprint/42761/1/tkleiner_EGU2012.pdf http://meetingorganizer.copernicus.org/EGU2012/EGU2012-13261.pdf https://hdl.handle.net/10013/epic.49355 https://hdl.handle.net/10013/epic.49355.d001 unknown https://epic.awi.de/id/eprint/42761/1/tkleiner_EGU2012.pdf https://hdl.handle.net/10013/epic.49355.d001 Kleiner, T. orcid:0000-0001-7825-5765 and Humbert, A. (2012) Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions , EGU General Assembly, 22 April 2012 - 27 April 2012 . hdl:10013/epic.49355 EPIC3EGU General Assembly, 2012-04-22-2012-04-27 Conference notRev 2012 ftawi 2021-12-24T15:42:17Z The evolution of the Antarctic ice sheet is highly affected by small scale topographic features that arise at the ice sheet margin where the ice flow towards the ocean ice channelized into ice streams and outlet glaciers. In general the ice sheet margin is characterized by pronounced basal relief and velocity gradients that require the consideration of both longitudinal and transverse stress gradients, as well as bridging effects in the force balance equation (Stokes equation). Furthermore, the widely temperate base of the ice sheet demands a reasonable law for basal sliding consequently also transport of basal melt water. We present numerical simulations of the present day ice flow using the three-dimensional thermo-coupled full- Stokes model TIM-FD3 on a 2.5 km horizontal grid in the area of the western Dronning Maud Land, Antarctica, including the three ice streams Stancomb-Wills, Veststraumen and Plogbreen and the adjacent Brunt and Riiser- Larsen ice shelves. We estimate the distribution of subglacial water based on flux routing methods. Since very little is known about the basal conditions in that area, we study the effect of different sliding laws for wet and dry conditions at the ice base on the overall flow field. Conference Object Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet Ice Shelves Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The Antarctic Dronning Maud Land Riiser-Larsen ENVELOPE(50.667,50.667,-66.783,-66.783) Veststraumen ENVELOPE(-13.000,-13.000,-74.000,-74.000) Plogbreen ENVELOPE(-13.583,-13.583,-73.167,-73.167) |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The evolution of the Antarctic ice sheet is highly affected by small scale topographic features that arise at the ice sheet margin where the ice flow towards the ocean ice channelized into ice streams and outlet glaciers. In general the ice sheet margin is characterized by pronounced basal relief and velocity gradients that require the consideration of both longitudinal and transverse stress gradients, as well as bridging effects in the force balance equation (Stokes equation). Furthermore, the widely temperate base of the ice sheet demands a reasonable law for basal sliding consequently also transport of basal melt water. We present numerical simulations of the present day ice flow using the three-dimensional thermo-coupled full- Stokes model TIM-FD3 on a 2.5 km horizontal grid in the area of the western Dronning Maud Land, Antarctica, including the three ice streams Stancomb-Wills, Veststraumen and Plogbreen and the adjacent Brunt and Riiser- Larsen ice shelves. We estimate the distribution of subglacial water based on flux routing methods. Since very little is known about the basal conditions in that area, we study the effect of different sliding laws for wet and dry conditions at the ice base on the overall flow field. |
format |
Conference Object |
author |
Kleiner, Thomas Humbert, Angelika |
spellingShingle |
Kleiner, Thomas Humbert, Angelika Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions |
author_facet |
Kleiner, Thomas Humbert, Angelika |
author_sort |
Kleiner, Thomas |
title |
Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions |
title_short |
Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions |
title_full |
Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions |
title_fullStr |
Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions |
title_full_unstemmed |
Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions |
title_sort |
numerical simulations of major ice streams in western dronning maud land, antarctica, under wet and dry basal conditions |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/42761/ https://epic.awi.de/id/eprint/42761/1/tkleiner_EGU2012.pdf http://meetingorganizer.copernicus.org/EGU2012/EGU2012-13261.pdf https://hdl.handle.net/10013/epic.49355 https://hdl.handle.net/10013/epic.49355.d001 |
long_lat |
ENVELOPE(50.667,50.667,-66.783,-66.783) ENVELOPE(-13.000,-13.000,-74.000,-74.000) ENVELOPE(-13.583,-13.583,-73.167,-73.167) |
geographic |
Antarctic The Antarctic Dronning Maud Land Riiser-Larsen Veststraumen Plogbreen |
geographic_facet |
Antarctic The Antarctic Dronning Maud Land Riiser-Larsen Veststraumen Plogbreen |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet Ice Shelves |
op_source |
EPIC3EGU General Assembly, 2012-04-22-2012-04-27 |
op_relation |
https://epic.awi.de/id/eprint/42761/1/tkleiner_EGU2012.pdf https://hdl.handle.net/10013/epic.49355.d001 Kleiner, T. orcid:0000-0001-7825-5765 and Humbert, A. (2012) Numerical simulations of major ice streams in western Dronning Maud Land, Antarctica, under wet and dry basal conditions , EGU General Assembly, 22 April 2012 - 27 April 2012 . hdl:10013/epic.49355 |
_version_ |
1766135357670162432 |