SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS.
The thickness of sea ice in McMurdo Sound, Antarctica, and its variations throughout the season and from year to year affects the safety and efficiency of travel and air operations by the U. S. Navy Antarctic Support Activities. The annual sea ice growth stages are: (1) youth - the ice sheet is acti...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1966
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/AD0684460 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0684460 |
id |
ftdtic:AD0684460 |
---|---|
record_format |
openpolar |
spelling |
ftdtic:AD0684460 2023-05-15T14:02:26+02:00 SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS. Paige,R. A. NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF 1966-10 text/html http://www.dtic.mil/docs/citations/AD0684460 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0684460 en eng http://www.dtic.mil/docs/citations/AD0684460 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost (*SEA ICE ANTARCTIC REGIONS) THICKNESS PERIODIC VARIATIONS TEMPERATURE PREDICTIONS DRILLING ACCURACY MCMURDO SOUND Text 1966 ftdtic 2016-02-18T21:50:55Z The thickness of sea ice in McMurdo Sound, Antarctica, and its variations throughout the season and from year to year affects the safety and efficiency of travel and air operations by the U. S. Navy Antarctic Support Activities. The annual sea ice growth stages are: (1) youth - the ice sheet is actively growing in thickness and extent; (2) maturity - growth ceases, maximum thickness is attained; (3) old age - the ice sheet is nearly isothermal and begins to thin rapidly by bottom melting. Growth rate and ultimate thickness varies locally depending mainly upon snow cover and proximity to land or the ice shelf. Bottom melting begins in mid-December and progresses rapidly until breakout. Thinning is differential depending upon location; the Cape Armitage sea ice area becomes dangerously thin when most of the sea ice in McMurdo Sound remains thick enough for safe travel. Measurements of thickness, air, ice and water temperature, and snow cover during the entire season are needed for correlation with accumulative degree-days to develop load-carrying curves and to predict thickness. (Author) Text Antarc* Antarctic Antarctica Ice Ice Sheet Ice Shelf McMurdo Sound permafrost Sea ice Defense Technical Information Center: DTIC Technical Reports database Antarctic McMurdo Sound Armitage ENVELOPE(166.667,166.667,-77.850,-77.850) Cape Armitage ENVELOPE(163.250,163.250,-78.150,-78.150) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost (*SEA ICE ANTARCTIC REGIONS) THICKNESS PERIODIC VARIATIONS TEMPERATURE PREDICTIONS DRILLING ACCURACY MCMURDO SOUND |
spellingShingle |
Snow Ice and Permafrost (*SEA ICE ANTARCTIC REGIONS) THICKNESS PERIODIC VARIATIONS TEMPERATURE PREDICTIONS DRILLING ACCURACY MCMURDO SOUND Paige,R. A. SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS. |
topic_facet |
Snow Ice and Permafrost (*SEA ICE ANTARCTIC REGIONS) THICKNESS PERIODIC VARIATIONS TEMPERATURE PREDICTIONS DRILLING ACCURACY MCMURDO SOUND |
description |
The thickness of sea ice in McMurdo Sound, Antarctica, and its variations throughout the season and from year to year affects the safety and efficiency of travel and air operations by the U. S. Navy Antarctic Support Activities. The annual sea ice growth stages are: (1) youth - the ice sheet is actively growing in thickness and extent; (2) maturity - growth ceases, maximum thickness is attained; (3) old age - the ice sheet is nearly isothermal and begins to thin rapidly by bottom melting. Growth rate and ultimate thickness varies locally depending mainly upon snow cover and proximity to land or the ice shelf. Bottom melting begins in mid-December and progresses rapidly until breakout. Thinning is differential depending upon location; the Cape Armitage sea ice area becomes dangerously thin when most of the sea ice in McMurdo Sound remains thick enough for safe travel. Measurements of thickness, air, ice and water temperature, and snow cover during the entire season are needed for correlation with accumulative degree-days to develop load-carrying curves and to predict thickness. (Author) |
author2 |
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF |
format |
Text |
author |
Paige,R. A. |
author_facet |
Paige,R. A. |
author_sort |
Paige,R. A. |
title |
SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS. |
title_short |
SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS. |
title_full |
SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS. |
title_fullStr |
SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS. |
title_full_unstemmed |
SEA ICE ON McMURDO SOUND, ANTARCTICA: PRELIMINARY THICKNESS. |
title_sort |
sea ice on mcmurdo sound, antarctica: preliminary thickness. |
publishDate |
1966 |
url |
http://www.dtic.mil/docs/citations/AD0684460 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0684460 |
long_lat |
ENVELOPE(166.667,166.667,-77.850,-77.850) ENVELOPE(163.250,163.250,-78.150,-78.150) |
geographic |
Antarctic McMurdo Sound Armitage Cape Armitage |
geographic_facet |
Antarctic McMurdo Sound Armitage Cape Armitage |
genre |
Antarc* Antarctic Antarctica Ice Ice Sheet Ice Shelf McMurdo Sound permafrost Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Ice Sheet Ice Shelf McMurdo Sound permafrost Sea ice |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0684460 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766272711108067328 |