Modeling ocean processes below Fimbulisen, Antarctica
Model simulations of circulation and melting beneath Fimbulisen, Antarctica, obtained using an isopycnic coordinate ocean model, are presented. Model results compare well with available observations of currents and hydrography in the open ocean to the north of Fimbulisen and suggest that Warm Deep W...
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American Geophysical Union
2006
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ftnerc:oai:nora.nerc.ac.uk:123 2024-06-09T07:40:44+00:00 Modeling ocean processes below Fimbulisen, Antarctica Smedsrud, Lars H. Jenkins, Adrian Holland, David M. Nost, Ole A. 2006 http://nora.nerc.ac.uk/id/eprint/123/ unknown American Geophysical Union Smedsrud, Lars H.; Jenkins, Adrian orcid:0000-0002-9117-0616 Holland, David M.; Nost, Ole A. 2006 Modeling ocean processes below Fimbulisen, Antarctica. Journal of Geophysical Research, 111 (C1), C01007. 13, pp. https://doi.org/10.1029/2005JC002915 <https://doi.org/10.1029/2005JC002915> Marine Sciences Glaciology Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1029/2005JC002915 2024-05-15T08:39:04Z Model simulations of circulation and melting beneath Fimbulisen, Antarctica, obtained using an isopycnic coordinate ocean model, are presented. Model results compare well with available observations of currents and hydrography in the open ocean to the north of Fimbulisen and suggest that Warm Deep Water exists above the level of a sub-ice-shelf bedrock sill, the principal pathway for warm waters to enter the sub-ice-shelf cavity. The model shows a southward inflow of Warm Deep Water over this sill and into the cavity, producing a mean cavity temperature close to −1.0°C. This leads to high levels of basal melting (>10 m/a) at the grounding line of Jutulstraumen and an average melting over the ice shelf base close to 1.9 m/a. The southward inflow is a compensating flow caused by the northward outflow of fresh, cold water produced by the basal melting. Results on inflow and melting are difficult to validate since no in situ measurements yet exist in the cavity. If such high melt rates are realistic, the mass balance of Fimbulisen must be significantly negative, and the ice shelves along Dronning Maud Land must contribute about 4.4 mSv of melt water to the Weddell Sea, about 15% of the total Antarctic meltwater input to the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antarctica Journal Dronning Maud Land Ice Shelf Ice Shelves Southern Ocean Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Dronning Maud Land Fimbulisen ENVELOPE(-0.500,-0.500,-70.750,-70.750) Jutulstraumen ENVELOPE(-1.000,-1.000,-72.000,-72.000) Southern Ocean Weddell Weddell Sea Journal of Geophysical Research 111 C1 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Glaciology |
spellingShingle |
Marine Sciences Glaciology Smedsrud, Lars H. Jenkins, Adrian Holland, David M. Nost, Ole A. Modeling ocean processes below Fimbulisen, Antarctica |
topic_facet |
Marine Sciences Glaciology |
description |
Model simulations of circulation and melting beneath Fimbulisen, Antarctica, obtained using an isopycnic coordinate ocean model, are presented. Model results compare well with available observations of currents and hydrography in the open ocean to the north of Fimbulisen and suggest that Warm Deep Water exists above the level of a sub-ice-shelf bedrock sill, the principal pathway for warm waters to enter the sub-ice-shelf cavity. The model shows a southward inflow of Warm Deep Water over this sill and into the cavity, producing a mean cavity temperature close to −1.0°C. This leads to high levels of basal melting (>10 m/a) at the grounding line of Jutulstraumen and an average melting over the ice shelf base close to 1.9 m/a. The southward inflow is a compensating flow caused by the northward outflow of fresh, cold water produced by the basal melting. Results on inflow and melting are difficult to validate since no in situ measurements yet exist in the cavity. If such high melt rates are realistic, the mass balance of Fimbulisen must be significantly negative, and the ice shelves along Dronning Maud Land must contribute about 4.4 mSv of melt water to the Weddell Sea, about 15% of the total Antarctic meltwater input to the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Smedsrud, Lars H. Jenkins, Adrian Holland, David M. Nost, Ole A. |
author_facet |
Smedsrud, Lars H. Jenkins, Adrian Holland, David M. Nost, Ole A. |
author_sort |
Smedsrud, Lars H. |
title |
Modeling ocean processes below Fimbulisen, Antarctica |
title_short |
Modeling ocean processes below Fimbulisen, Antarctica |
title_full |
Modeling ocean processes below Fimbulisen, Antarctica |
title_fullStr |
Modeling ocean processes below Fimbulisen, Antarctica |
title_full_unstemmed |
Modeling ocean processes below Fimbulisen, Antarctica |
title_sort |
modeling ocean processes below fimbulisen, antarctica |
publisher |
American Geophysical Union |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/123/ |
long_lat |
ENVELOPE(-0.500,-0.500,-70.750,-70.750) ENVELOPE(-1.000,-1.000,-72.000,-72.000) |
geographic |
Antarctic Dronning Maud Land Fimbulisen Jutulstraumen Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Dronning Maud Land Fimbulisen Jutulstraumen Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Antarctica Journal Dronning Maud Land Ice Shelf Ice Shelves Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal Dronning Maud Land Ice Shelf Ice Shelves Southern Ocean Weddell Sea |
op_relation |
Smedsrud, Lars H.; Jenkins, Adrian orcid:0000-0002-9117-0616 Holland, David M.; Nost, Ole A. 2006 Modeling ocean processes below Fimbulisen, Antarctica. Journal of Geophysical Research, 111 (C1), C01007. 13, pp. https://doi.org/10.1029/2005JC002915 <https://doi.org/10.1029/2005JC002915> |
op_doi |
https://doi.org/10.1029/2005JC002915 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
C1 |
_version_ |
1801369146750926848 |