The Decay of an Annual Cover of Sea Ice
The report discusses the melting of sea ice during the Arctic summer by thermal interaction with the surrounding water and derives an expression which indicates that the proportion of open water increases exponentially with time until total ice-free conditions result. The equation predicts that the...
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ftdtic:AD0765938 2023-05-15T13:11:14+02:00 The Decay of an Annual Cover of Sea Ice Langleben,M. P. MCGILL UNIV MONTREAL (QUEBEC) DEPT OF PHYSICS 1971-10-25 text/html http://www.dtic.mil/docs/citations/AD0765938 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0765938 en eng http://www.dtic.mil/docs/citations/AD0765938 Availability: Pub. in Jnl. of Glaciology, v11 n63 p337-344 1972. DTIC AND NTIS Snow Ice and Permafrost (*SEA ICE MELTING) (*ARCTIC REGIONS SEA ICE) THERMAL RADIATION INTERACTIONS THICKNESS MATHEMATICAL PREDICTION FREEZING Text 1971 ftdtic 2016-02-19T03:09:11Z The report discusses the melting of sea ice during the Arctic summer by thermal interaction with the surrounding water and derives an expression which indicates that the proportion of open water increases exponentially with time until total ice-free conditions result. The equation predicts that the time required for complete decay of the ice cover after initial break-up is greater than one month and more likely as long as two months for representative values of incident shortwave radiation and initial ice thickness upon break-up. It is unlikely that above-freezing temperatures persist for this length of time. To explain the observed complete disintegration of the annual ice cover in many sheltered areas of the Arctic, a modified model of the thermal decay process has been introduced and takes into account the influence of radiation absorbed by the ice. Considerable reduction in the time required for complete decay, generally by about a factor of 2 if an albedo of 0.4 is assumed for the ice surface, is obtained. (Modified author abstract) Report on Ice Research Project. Text albedo Arctic Ice permafrost Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost (*SEA ICE MELTING) (*ARCTIC REGIONS SEA ICE) THERMAL RADIATION INTERACTIONS THICKNESS MATHEMATICAL PREDICTION FREEZING |
spellingShingle |
Snow Ice and Permafrost (*SEA ICE MELTING) (*ARCTIC REGIONS SEA ICE) THERMAL RADIATION INTERACTIONS THICKNESS MATHEMATICAL PREDICTION FREEZING Langleben,M. P. The Decay of an Annual Cover of Sea Ice |
topic_facet |
Snow Ice and Permafrost (*SEA ICE MELTING) (*ARCTIC REGIONS SEA ICE) THERMAL RADIATION INTERACTIONS THICKNESS MATHEMATICAL PREDICTION FREEZING |
description |
The report discusses the melting of sea ice during the Arctic summer by thermal interaction with the surrounding water and derives an expression which indicates that the proportion of open water increases exponentially with time until total ice-free conditions result. The equation predicts that the time required for complete decay of the ice cover after initial break-up is greater than one month and more likely as long as two months for representative values of incident shortwave radiation and initial ice thickness upon break-up. It is unlikely that above-freezing temperatures persist for this length of time. To explain the observed complete disintegration of the annual ice cover in many sheltered areas of the Arctic, a modified model of the thermal decay process has been introduced and takes into account the influence of radiation absorbed by the ice. Considerable reduction in the time required for complete decay, generally by about a factor of 2 if an albedo of 0.4 is assumed for the ice surface, is obtained. (Modified author abstract) Report on Ice Research Project. |
author2 |
MCGILL UNIV MONTREAL (QUEBEC) DEPT OF PHYSICS |
format |
Text |
author |
Langleben,M. P. |
author_facet |
Langleben,M. P. |
author_sort |
Langleben,M. P. |
title |
The Decay of an Annual Cover of Sea Ice |
title_short |
The Decay of an Annual Cover of Sea Ice |
title_full |
The Decay of an Annual Cover of Sea Ice |
title_fullStr |
The Decay of an Annual Cover of Sea Ice |
title_full_unstemmed |
The Decay of an Annual Cover of Sea Ice |
title_sort |
decay of an annual cover of sea ice |
publishDate |
1971 |
url |
http://www.dtic.mil/docs/citations/AD0765938 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0765938 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Ice permafrost Sea ice |
genre_facet |
albedo Arctic Ice permafrost Sea ice |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0765938 |
op_rights |
Availability: Pub. in Jnl. of Glaciology, v11 n63 p337-344 1972. |
_version_ |
1766246462693310464 |