Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling
This paper presents a new compilation of gridded data sets for three-dimensional modeling of the Antarctic ice sheet. These are for surface elevation, icethickness, bedrock elevation and accumulation rate as interpolated on a 281 x 281 mesh with 20 km spacing, and encompass all of the ice sheet and...
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ftawi:oai:epic.awi.de:1479 2023-09-05T13:12:05+02:00 Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling Huybrechts, Philippe Steinhage, Daniel Wilhelms, Frank Bamber, J. 2000 application/pdf https://epic.awi.de/id/eprint/1479/ https://epic.awi.de/id/eprint/1479/1/Huy9999b.pdf https://hdl.handle.net/10013/epic.12070 https://hdl.handle.net/10013/epic.12070.d001 unknown https://epic.awi.de/id/eprint/1479/1/Huy9999b.pdf https://hdl.handle.net/10013/epic.12070.d001 Huybrechts, P. , Steinhage, D. orcid:0000-0003-4737-9751 , Wilhelms, F. orcid:0000-0001-7688-3135 and Bamber, J. (2000) Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling , Annals of Glaciology, 30 , pp. 52-60 . hdl:10013/epic.12070 EPIC3Annals of Glaciology, 30, pp. 52-60 Article isiRev 2000 ftawi 2023-08-22T19:42:40Z This paper presents a new compilation of gridded data sets for three-dimensional modeling of the Antarctic ice sheet. These are for surface elevation, icethickness, bedrock elevation and accumulation rate as interpolated on a 281 x 281 mesh with 20 km spacing, and encompass all of the ice sheet and thesurrounding continental shelf. Data sources include the Bamber digital elevation model from ERS-1 radar altimeter data, a redigitization of available ice thicknessdata, the Giovinetto accumulation data, recent ice-thickness data from British and German expeditions as well as accumulation data from German and Norwegianexpeditions. In particular, new data were incorporated for the Filchner-Ronne-Schelfeis and for Dronning Maud Land arising from the EPICA pre-site survey.Special attention was devoted to carefully match the various data sources, both among themselves as across the grounding line and below the ice shelves toenable ice-sheet expansion and retreat in dynamic situations. As an application, the balance flow is calculated over the entire ice sheet using a two-dimensionalfinite difference scheme and compared with a previous assessment. This brought to light the existence of ice-streaming features extending well inland of the icesheet. A detailed zoom over Dronning Maud Land exhibits the general flow characteristics of interest for locating a future deep-drilling site. As a by-product, anupdated value of 26.4 x 106 km3 was obtained for the total volume of the ice sheet and ice shelves, or equivalent to 61.1 m of global sea-level rise after removalof the ice sheet and subsequent oceanic invasion and isostatic rebound. The total accumulation over the grounded ice sheet, including the Antarctic Peninsula, is1924 Gta-1, or between 5 and 20% higher than earlier estimates. Including all of the ice shelves, the value is 2344 Gta-1. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Dronning Maud Land EPICA Ice Sheet Ice Shelves Schelfeis* Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula Dronning Maud Land Filchner-Ronne-Schelfeis ENVELOPE(-55.000,-55.000,-79.000,-79.000) The Antarctic |
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 |
This paper presents a new compilation of gridded data sets for three-dimensional modeling of the Antarctic ice sheet. These are for surface elevation, icethickness, bedrock elevation and accumulation rate as interpolated on a 281 x 281 mesh with 20 km spacing, and encompass all of the ice sheet and thesurrounding continental shelf. Data sources include the Bamber digital elevation model from ERS-1 radar altimeter data, a redigitization of available ice thicknessdata, the Giovinetto accumulation data, recent ice-thickness data from British and German expeditions as well as accumulation data from German and Norwegianexpeditions. In particular, new data were incorporated for the Filchner-Ronne-Schelfeis and for Dronning Maud Land arising from the EPICA pre-site survey.Special attention was devoted to carefully match the various data sources, both among themselves as across the grounding line and below the ice shelves toenable ice-sheet expansion and retreat in dynamic situations. As an application, the balance flow is calculated over the entire ice sheet using a two-dimensionalfinite difference scheme and compared with a previous assessment. This brought to light the existence of ice-streaming features extending well inland of the icesheet. A detailed zoom over Dronning Maud Land exhibits the general flow characteristics of interest for locating a future deep-drilling site. As a by-product, anupdated value of 26.4 x 106 km3 was obtained for the total volume of the ice sheet and ice shelves, or equivalent to 61.1 m of global sea-level rise after removalof the ice sheet and subsequent oceanic invasion and isostatic rebound. The total accumulation over the grounded ice sheet, including the Antarctic Peninsula, is1924 Gta-1, or between 5 and 20% higher than earlier estimates. Including all of the ice shelves, the value is 2344 Gta-1. |
format |
Article in Journal/Newspaper |
author |
Huybrechts, Philippe Steinhage, Daniel Wilhelms, Frank Bamber, J. |
spellingShingle |
Huybrechts, Philippe Steinhage, Daniel Wilhelms, Frank Bamber, J. Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling |
author_facet |
Huybrechts, Philippe Steinhage, Daniel Wilhelms, Frank Bamber, J. |
author_sort |
Huybrechts, Philippe |
title |
Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling |
title_short |
Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling |
title_full |
Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling |
title_fullStr |
Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling |
title_full_unstemmed |
Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling |
title_sort |
balance velocities and measured properties of the antarctic ice sheet from a new compilation of gridded data for modelling |
publishDate |
2000 |
url |
https://epic.awi.de/id/eprint/1479/ https://epic.awi.de/id/eprint/1479/1/Huy9999b.pdf https://hdl.handle.net/10013/epic.12070 https://hdl.handle.net/10013/epic.12070.d001 |
long_lat |
ENVELOPE(-55.000,-55.000,-79.000,-79.000) |
geographic |
Antarctic Antarctic Peninsula Dronning Maud Land Filchner-Ronne-Schelfeis The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Dronning Maud Land Filchner-Ronne-Schelfeis The Antarctic |
genre |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Dronning Maud Land EPICA Ice Sheet Ice Shelves Schelfeis* |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Dronning Maud Land EPICA Ice Sheet Ice Shelves Schelfeis* |
op_source |
EPIC3Annals of Glaciology, 30, pp. 52-60 |
op_relation |
https://epic.awi.de/id/eprint/1479/1/Huy9999b.pdf https://hdl.handle.net/10013/epic.12070.d001 Huybrechts, P. , Steinhage, D. orcid:0000-0003-4737-9751 , Wilhelms, F. orcid:0000-0001-7688-3135 and Bamber, J. (2000) Balance velocities and measured properties of the Antarctic ice sheet from a new compilation of gridded data for modelling , Annals of Glaciology, 30 , pp. 52-60 . hdl:10013/epic.12070 |
_version_ |
1776198914855141376 |