The effect of a new drag-law parameterization on ice shelf water plume dynamics
A drag law accounting for Ekman rotation adjacent to a flat, horizontal bou ndary is proposed for use in a plume model that is written in terms of the depth-mean velocity. The drag l aw contains a variable turning angle between the mean velocity and the drag imposed by the turbulent bound ary layer....
Published in: | Journal of Physical Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Meteorological Society
2007
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Online Access: | https://centaur.reading.ac.uk/35314/ https://centaur.reading.ac.uk/35314/1/jpo3093%252E1.pdf https://doi.org/10.1175/JPO3093.1 |
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ftunivreading:oai:centaur.reading.ac.uk:35314 2024-06-23T07:47:59+00:00 The effect of a new drag-law parameterization on ice shelf water plume dynamics Wilchinsky, Alexander V. Feltham, D.L Holland, Paul R. 2007 text https://centaur.reading.ac.uk/35314/ https://centaur.reading.ac.uk/35314/1/jpo3093%252E1.pdf https://doi.org/10.1175/JPO3093.1 en eng American Meteorological Society https://centaur.reading.ac.uk/35314/1/jpo3093%252E1.pdf Wilchinsky, A. V., Feltham, D.L. <https://centaur.reading.ac.uk/view/creators/90004991.html> orcid:0000-0003-2289-014X and Holland, P. R. (2007) The effect of a new drag-law parameterization on ice shelf water plume dynamics. Journal of Physical Oceanography, 37 (7). pp. 1778-1792. ISSN 0022-3670 doi: https://doi.org/10.1175/JPO3093.1 <https://doi.org/10.1175/JPO3093.1> Article PeerReviewed 2007 ftunivreading https://doi.org/10.1175/JPO3093.1 2024-06-11T15:01:09Z A drag law accounting for Ekman rotation adjacent to a flat, horizontal bou ndary is proposed for use in a plume model that is written in terms of the depth-mean velocity. The drag l aw contains a variable turning angle between the mean velocity and the drag imposed by the turbulent bound ary layer. The effect of the variable turning angle in the drag law is studied for a plume of ice shelf wat er (ISW) ascending and turning beneath an Antarctic ice shelf with draft decreasing away from the groundi ng line. As the ISW plume ascends the sloping ice shelf–ocean boundary, it can melt the ice shelf, wh ich alters the buoyancy forcing driving the plume motion. Under these conditions, the typical turning ang le is of order 10° over most of the plume area for a range of drag coefficients (the minus sign arises for th e Southern Hemisphere). The rotation of the drag with respect to the mean velocity is found to be signifi cant if the drag coefficient exceeds 0.003; in this case the plume body propagates farther along and across the b ase of the ice shelf than a plume with the standard quadratic drag law with no turning angle. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf CentAUR: Central Archive at the University of Reading Antarctic Journal of Physical Oceanography 37 7 1778 1792 |
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Open Polar |
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CentAUR: Central Archive at the University of Reading |
op_collection_id |
ftunivreading |
language |
English |
description |
A drag law accounting for Ekman rotation adjacent to a flat, horizontal bou ndary is proposed for use in a plume model that is written in terms of the depth-mean velocity. The drag l aw contains a variable turning angle between the mean velocity and the drag imposed by the turbulent bound ary layer. The effect of the variable turning angle in the drag law is studied for a plume of ice shelf wat er (ISW) ascending and turning beneath an Antarctic ice shelf with draft decreasing away from the groundi ng line. As the ISW plume ascends the sloping ice shelf–ocean boundary, it can melt the ice shelf, wh ich alters the buoyancy forcing driving the plume motion. Under these conditions, the typical turning ang le is of order 10° over most of the plume area for a range of drag coefficients (the minus sign arises for th e Southern Hemisphere). The rotation of the drag with respect to the mean velocity is found to be signifi cant if the drag coefficient exceeds 0.003; in this case the plume body propagates farther along and across the b ase of the ice shelf than a plume with the standard quadratic drag law with no turning angle. |
format |
Article in Journal/Newspaper |
author |
Wilchinsky, Alexander V. Feltham, D.L Holland, Paul R. |
spellingShingle |
Wilchinsky, Alexander V. Feltham, D.L Holland, Paul R. The effect of a new drag-law parameterization on ice shelf water plume dynamics |
author_facet |
Wilchinsky, Alexander V. Feltham, D.L Holland, Paul R. |
author_sort |
Wilchinsky, Alexander V. |
title |
The effect of a new drag-law parameterization on ice shelf water plume dynamics |
title_short |
The effect of a new drag-law parameterization on ice shelf water plume dynamics |
title_full |
The effect of a new drag-law parameterization on ice shelf water plume dynamics |
title_fullStr |
The effect of a new drag-law parameterization on ice shelf water plume dynamics |
title_full_unstemmed |
The effect of a new drag-law parameterization on ice shelf water plume dynamics |
title_sort |
effect of a new drag-law parameterization on ice shelf water plume dynamics |
publisher |
American Meteorological Society |
publishDate |
2007 |
url |
https://centaur.reading.ac.uk/35314/ https://centaur.reading.ac.uk/35314/1/jpo3093%252E1.pdf https://doi.org/10.1175/JPO3093.1 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Ice Shelf |
genre_facet |
Antarc* Antarctic Ice Shelf |
op_relation |
https://centaur.reading.ac.uk/35314/1/jpo3093%252E1.pdf Wilchinsky, A. V., Feltham, D.L. <https://centaur.reading.ac.uk/view/creators/90004991.html> orcid:0000-0003-2289-014X and Holland, P. R. (2007) The effect of a new drag-law parameterization on ice shelf water plume dynamics. Journal of Physical Oceanography, 37 (7). pp. 1778-1792. ISSN 0022-3670 doi: https://doi.org/10.1175/JPO3093.1 <https://doi.org/10.1175/JPO3093.1> |
op_doi |
https://doi.org/10.1175/JPO3093.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
37 |
container_issue |
7 |
container_start_page |
1778 |
op_container_end_page |
1792 |
_version_ |
1802638309732646912 |