The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes
A model of the dynamics and thermodynamics of a plume of meltwater at the base of an ice shelf is presented. Such ice shelf water plumes may become supercooled and deposit marine ice if they rise (because of the pressure decrease in the in situ freezing temperature), so the model incorporates both m...
Published in: | Journal of Physical Oceanography |
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American Meteorological Society
2006
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Online Access: | http://nora.nerc.ac.uk/id/eprint/950/ https://doi.org/10.1175/JPO2970.1 |
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ftnerc:oai:nora.nerc.ac.uk:950 2024-06-09T07:40:24+00:00 The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes Holland, Paul R. Feltham, Daniel L. 2006 http://nora.nerc.ac.uk/id/eprint/950/ https://doi.org/10.1175/JPO2970.1 unknown American Meteorological Society Holland, Paul R. orcid:0000-0001-8370-289X Feltham, Daniel L. 2006 The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes. Journal of Physical Oceanography, 36 (12). 2312-2327. https://doi.org/10.1175/JPO2970.1 <https://doi.org/10.1175/JPO2970.1> Marine Sciences Glaciology Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1175/JPO2970.1 2024-05-15T08:39:04Z A model of the dynamics and thermodynamics of a plume of meltwater at the base of an ice shelf is presented. Such ice shelf water plumes may become supercooled and deposit marine ice if they rise (because of the pressure decrease in the in situ freezing temperature), so the model incorporates both melting and freezing at the ice shelf base and a multiple-size-class model of frazil ice dynamics and deposition. The plume is considered in two horizontal dimensions, so the influence of Coriolis forces is incorporated for the first time. It is found that rotation is extremely influential, with simulated plumes flowing in near-geostrophy because of the low friction at a smooth ice shelf base. As a result, an ice shelf water plume will only rise and become supercooled (and thus deposit marine ice) if it is constrained to flow upslope by topography. This result agrees with the observed distribution of marine ice under Filchner–Ronne Ice Shelf, Antarctica. In addition, it is found that the model only produces reasonable marine ice formation rates when an accurate ice shelf draft is used, implying that the characteristics of real ice shelf water plumes can only be captured using models with both rotation and a realistic topography. Article in Journal/Newspaper Antarc* Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Natural Environment Research Council: NERC Open Research Archive Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Journal of Physical Oceanography 36 12 2312 2327 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Glaciology |
spellingShingle |
Marine Sciences Glaciology Holland, Paul R. Feltham, Daniel L. The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes |
topic_facet |
Marine Sciences Glaciology |
description |
A model of the dynamics and thermodynamics of a plume of meltwater at the base of an ice shelf is presented. Such ice shelf water plumes may become supercooled and deposit marine ice if they rise (because of the pressure decrease in the in situ freezing temperature), so the model incorporates both melting and freezing at the ice shelf base and a multiple-size-class model of frazil ice dynamics and deposition. The plume is considered in two horizontal dimensions, so the influence of Coriolis forces is incorporated for the first time. It is found that rotation is extremely influential, with simulated plumes flowing in near-geostrophy because of the low friction at a smooth ice shelf base. As a result, an ice shelf water plume will only rise and become supercooled (and thus deposit marine ice) if it is constrained to flow upslope by topography. This result agrees with the observed distribution of marine ice under Filchner–Ronne Ice Shelf, Antarctica. In addition, it is found that the model only produces reasonable marine ice formation rates when an accurate ice shelf draft is used, implying that the characteristics of real ice shelf water plumes can only be captured using models with both rotation and a realistic topography. |
format |
Article in Journal/Newspaper |
author |
Holland, Paul R. Feltham, Daniel L. |
author_facet |
Holland, Paul R. Feltham, Daniel L. |
author_sort |
Holland, Paul R. |
title |
The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes |
title_short |
The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes |
title_full |
The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes |
title_fullStr |
The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes |
title_full_unstemmed |
The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes |
title_sort |
effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes |
publisher |
American Meteorological Society |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/950/ https://doi.org/10.1175/JPO2970.1 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Ronne Ice Shelf |
geographic_facet |
Ronne Ice Shelf |
genre |
Antarc* Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf |
genre_facet |
Antarc* Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf |
op_relation |
Holland, Paul R. orcid:0000-0001-8370-289X Feltham, Daniel L. 2006 The effects of rotation and ice shelf topography on frazil-laden ice shelf water plumes. Journal of Physical Oceanography, 36 (12). 2312-2327. https://doi.org/10.1175/JPO2970.1 <https://doi.org/10.1175/JPO2970.1> |
op_doi |
https://doi.org/10.1175/JPO2970.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
36 |
container_issue |
12 |
container_start_page |
2312 |
op_container_end_page |
2327 |
_version_ |
1801383815456751616 |