Mass Balance of Antarctica and Sea Level Change
The overall mass balance of the Antarctic ice sheet has been estimated by comparison of the best available data on input in the form of snowfall with output in the form of ice flux through gates at or near the margin of the ice sheet. Surface melt is a negligible contributor to mass balance and has...
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ftdtic:ADP007329 2023-05-15T13:38:48+02:00 Mass Balance of Antarctica and Sea Level Change Bentley, C. R. Giovinetto, M. B. WISCONSIN UNIV-MADISON GEOPHYSICAL AND POLAR RESEARCH CENTER 1992-03 text/html http://www.dtic.mil/docs/citations/ADP007329 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007329 en eng http://www.dtic.mil/docs/citations/ADP007329 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost Geography Geodesy *BALANCE *ICE *MASS *SEA LEVEL *SHEETS *ANTARCTIC REGIONS BOTTOM COMPARISON ERRORS ICEBERGS INPUT MELTS OCEANS OUTPUT SURFACES UNCERTAINTY SYMPOSIA Component Reports Ice shelves breakbacks Text 1992 ftdtic 2016-02-19T17:39:41Z The overall mass balance of the Antarctic ice sheet has been estimated by comparison of the best available data on input in the form of snowfall with output in the form of ice flux through gates at or near the margin of the ice sheet. Surface melt is a negligible contributor to mass balance and has been ignored. Bottom melt under large ice shelves remains a major source of uncertainty. We conclude that there is probably an excess input of 2-25% of the total input, equivalent to a sea level lowering of 0.1-1.1 mm yr-l. Although errors remain, it becomes increasingly clear that an antarctic contribution to current sea level rise is unlikely. We attribute a reported iceberg flux that is larger than the mass input to a non-equilibrium breakback of the fronts of the ice shelves. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 990. Volume 2', AD-A253 028, p481-488. See also Volume 1, AD-A253 027. Text Antarc* Antarctic Antarctica Ice Ice Sheet Ice Shelves Iceberg* permafrost Alaska Defense Technical Information Center: DTIC Technical Reports database Antarctic Fairbanks The Antarctic |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Geography Geodesy *BALANCE *ICE *MASS *SEA LEVEL *SHEETS *ANTARCTIC REGIONS BOTTOM COMPARISON ERRORS ICEBERGS INPUT MELTS OCEANS OUTPUT SURFACES UNCERTAINTY SYMPOSIA Component Reports Ice shelves breakbacks |
spellingShingle |
Snow Ice and Permafrost Geography Geodesy *BALANCE *ICE *MASS *SEA LEVEL *SHEETS *ANTARCTIC REGIONS BOTTOM COMPARISON ERRORS ICEBERGS INPUT MELTS OCEANS OUTPUT SURFACES UNCERTAINTY SYMPOSIA Component Reports Ice shelves breakbacks Bentley, C. R. Giovinetto, M. B. Mass Balance of Antarctica and Sea Level Change |
topic_facet |
Snow Ice and Permafrost Geography Geodesy *BALANCE *ICE *MASS *SEA LEVEL *SHEETS *ANTARCTIC REGIONS BOTTOM COMPARISON ERRORS ICEBERGS INPUT MELTS OCEANS OUTPUT SURFACES UNCERTAINTY SYMPOSIA Component Reports Ice shelves breakbacks |
description |
The overall mass balance of the Antarctic ice sheet has been estimated by comparison of the best available data on input in the form of snowfall with output in the form of ice flux through gates at or near the margin of the ice sheet. Surface melt is a negligible contributor to mass balance and has been ignored. Bottom melt under large ice shelves remains a major source of uncertainty. We conclude that there is probably an excess input of 2-25% of the total input, equivalent to a sea level lowering of 0.1-1.1 mm yr-l. Although errors remain, it becomes increasingly clear that an antarctic contribution to current sea level rise is unlikely. We attribute a reported iceberg flux that is larger than the mass input to a non-equilibrium breakback of the fronts of the ice shelves. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 990. Volume 2', AD-A253 028, p481-488. See also Volume 1, AD-A253 027. |
author2 |
WISCONSIN UNIV-MADISON GEOPHYSICAL AND POLAR RESEARCH CENTER |
format |
Text |
author |
Bentley, C. R. Giovinetto, M. B. |
author_facet |
Bentley, C. R. Giovinetto, M. B. |
author_sort |
Bentley, C. R. |
title |
Mass Balance of Antarctica and Sea Level Change |
title_short |
Mass Balance of Antarctica and Sea Level Change |
title_full |
Mass Balance of Antarctica and Sea Level Change |
title_fullStr |
Mass Balance of Antarctica and Sea Level Change |
title_full_unstemmed |
Mass Balance of Antarctica and Sea Level Change |
title_sort |
mass balance of antarctica and sea level change |
publishDate |
1992 |
url |
http://www.dtic.mil/docs/citations/ADP007329 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007329 |
geographic |
Antarctic Fairbanks The Antarctic |
geographic_facet |
Antarctic Fairbanks The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Ice Sheet Ice Shelves Iceberg* permafrost Alaska |
genre_facet |
Antarc* Antarctic Antarctica Ice Ice Sheet Ice Shelves Iceberg* permafrost Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADP007329 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766111260300017664 |