Structure of a Multi-Year Pressure Ridge
Three transverse profiles across a large pressure ridge located in the Beaufort Sea are presented. The ridge sail extended 4m. above sea level and the ridge keel 13 m. below. The cross-sections of the ridge keel can be described as roughly semi-circular. This suggests that form drag coefficients for...
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The Arctic Institute of North America
1973
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/65945 2023-05-15T14:19:19+02:00 Structure of a Multi-Year Pressure Ridge Kovacs, A. Weeks, W.F. Ackley, S. Hibler, W.D. 1973-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65945 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65945/49859 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65945 ARCTIC; Vol. 26 No. 1 (1973): March: 1–88; 22-31 1923-1245 0004-0843 Icebreakers Icebreaking Marine transportation Physical properties Pressure ridges Salinity Sea ice Manhattan (Ship) Strength Beaufort Sea info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1973 ftunivcalgaryojs 2022-03-22T21:22:54Z Three transverse profiles across a large pressure ridge located in the Beaufort Sea are presented. The ridge sail extended 4m. above sea level and the ridge keel 13 m. below. The cross-sections of the ridge keel can be described as roughly semi-circular. This suggests that form drag coefficients for flow transverse to the long axes of multi-year ridges may be as high as 0.8. Examination of several salinity, temperature and brine-volume profiles shows that much of the ice in the ridge has a very low salinity and is quite strong. All the inter-block voids that initially existed in the ridge at the time of its formation have been completely filled with ice. These observations, coupled with icebreaking experience indicate that multi-year ridges are, indeed, significant obstacles to even the largest icebreaking ship and should be avoided if possible. A very large first year ridge with a sail height of 12.8 m. is also described. This is the largest free-floating ridge yet measured. Article in Journal/Newspaper Arctic Beaufort Sea Sea ice University of Calgary Journal Hosting ARCTIC 26 1 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Icebreakers Icebreaking Marine transportation Physical properties Pressure ridges Salinity Sea ice Manhattan (Ship) Strength Beaufort Sea |
spellingShingle |
Icebreakers Icebreaking Marine transportation Physical properties Pressure ridges Salinity Sea ice Manhattan (Ship) Strength Beaufort Sea Kovacs, A. Weeks, W.F. Ackley, S. Hibler, W.D. Structure of a Multi-Year Pressure Ridge |
topic_facet |
Icebreakers Icebreaking Marine transportation Physical properties Pressure ridges Salinity Sea ice Manhattan (Ship) Strength Beaufort Sea |
description |
Three transverse profiles across a large pressure ridge located in the Beaufort Sea are presented. The ridge sail extended 4m. above sea level and the ridge keel 13 m. below. The cross-sections of the ridge keel can be described as roughly semi-circular. This suggests that form drag coefficients for flow transverse to the long axes of multi-year ridges may be as high as 0.8. Examination of several salinity, temperature and brine-volume profiles shows that much of the ice in the ridge has a very low salinity and is quite strong. All the inter-block voids that initially existed in the ridge at the time of its formation have been completely filled with ice. These observations, coupled with icebreaking experience indicate that multi-year ridges are, indeed, significant obstacles to even the largest icebreaking ship and should be avoided if possible. A very large first year ridge with a sail height of 12.8 m. is also described. This is the largest free-floating ridge yet measured. |
format |
Article in Journal/Newspaper |
author |
Kovacs, A. Weeks, W.F. Ackley, S. Hibler, W.D. |
author_facet |
Kovacs, A. Weeks, W.F. Ackley, S. Hibler, W.D. |
author_sort |
Kovacs, A. |
title |
Structure of a Multi-Year Pressure Ridge |
title_short |
Structure of a Multi-Year Pressure Ridge |
title_full |
Structure of a Multi-Year Pressure Ridge |
title_fullStr |
Structure of a Multi-Year Pressure Ridge |
title_full_unstemmed |
Structure of a Multi-Year Pressure Ridge |
title_sort |
structure of a multi-year pressure ridge |
publisher |
The Arctic Institute of North America |
publishDate |
1973 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65945 |
genre |
Arctic Beaufort Sea Sea ice |
genre_facet |
Arctic Beaufort Sea Sea ice |
op_source |
ARCTIC; Vol. 26 No. 1 (1973): March: 1–88; 22-31 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65945/49859 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65945 |
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ARCTIC |
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