Ice-shelf ocean boundary layer dynamics from large-eddy simulations
Small-scale turbulent flow below ice shelves is regionally isolated and difficult to measure and simulate. Yet these small-scale processes, which regulate heat and salt transfer between the ocean and ice shelves, can affect sea-level rise by altering the ability of Antarctic ice shelves to “buttress...
Published in: | The Cryosphere |
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Online Access: | http://www.osti.gov/servlets/purl/1855137 https://www.osti.gov/biblio/1855137 https://doi.org/10.5194/tc-16-277-2022 |
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ftosti:oai:osti.gov:1855137 2023-07-30T03:56:41+02:00 Ice-shelf ocean boundary layer dynamics from large-eddy simulations Begeman, Carolyn Branecky Asay-Davis, Xylar Storm Van Roekel, Luke 2022-05-02 application/pdf http://www.osti.gov/servlets/purl/1855137 https://www.osti.gov/biblio/1855137 https://doi.org/10.5194/tc-16-277-2022 unknown http://www.osti.gov/servlets/purl/1855137 https://www.osti.gov/biblio/1855137 https://doi.org/10.5194/tc-16-277-2022 doi:10.5194/tc-16-277-2022 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.5194/tc-16-277-2022 2023-07-11T10:11:08Z Small-scale turbulent flow below ice shelves is regionally isolated and difficult to measure and simulate. Yet these small-scale processes, which regulate heat and salt transfer between the ocean and ice shelves, can affect sea-level rise by altering the ability of Antarctic ice shelves to “buttress” ice flux to the ocean. In this study, we improve our understanding of turbulence below ice shelves by means of large-eddy simulations at sub-meter resolution, capturing boundary layer mixing at scales intermediate between laboratory experiments or direct numerical simulations and regional or global ocean circulation models. Our simulations feature the development of an ice-shelf ocean boundary layer through dynamic ice melting in a regime with low thermal driving, low ice-shelf basal slope, and strong shear driven by the geostrophic flow. We present a preliminary assessment of existing ice-shelf basal melt parameterizations adopted in single component or coupled ice-sheet and ocean models on the basis of a small parameter study. While the parameterized linear relationship between ice-shelf melt rate and far-field ocean temperature appears to be robust, we point out a little-considered relationship between ice-shelf basal slope and melting worthy of further study. Other/Unknown Material Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic Buttress ENVELOPE(-57.083,-57.083,-63.550,-63.550) The Cryosphere 16 1 277 295 |
institution |
Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Begeman, Carolyn Branecky Asay-Davis, Xylar Storm Van Roekel, Luke Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Small-scale turbulent flow below ice shelves is regionally isolated and difficult to measure and simulate. Yet these small-scale processes, which regulate heat and salt transfer between the ocean and ice shelves, can affect sea-level rise by altering the ability of Antarctic ice shelves to “buttress” ice flux to the ocean. In this study, we improve our understanding of turbulence below ice shelves by means of large-eddy simulations at sub-meter resolution, capturing boundary layer mixing at scales intermediate between laboratory experiments or direct numerical simulations and regional or global ocean circulation models. Our simulations feature the development of an ice-shelf ocean boundary layer through dynamic ice melting in a regime with low thermal driving, low ice-shelf basal slope, and strong shear driven by the geostrophic flow. We present a preliminary assessment of existing ice-shelf basal melt parameterizations adopted in single component or coupled ice-sheet and ocean models on the basis of a small parameter study. While the parameterized linear relationship between ice-shelf melt rate and far-field ocean temperature appears to be robust, we point out a little-considered relationship between ice-shelf basal slope and melting worthy of further study. |
author |
Begeman, Carolyn Branecky Asay-Davis, Xylar Storm Van Roekel, Luke |
author_facet |
Begeman, Carolyn Branecky Asay-Davis, Xylar Storm Van Roekel, Luke |
author_sort |
Begeman, Carolyn Branecky |
title |
Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
title_short |
Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
title_full |
Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
title_fullStr |
Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
title_full_unstemmed |
Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
title_sort |
ice-shelf ocean boundary layer dynamics from large-eddy simulations |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1855137 https://www.osti.gov/biblio/1855137 https://doi.org/10.5194/tc-16-277-2022 |
long_lat |
ENVELOPE(-57.083,-57.083,-63.550,-63.550) |
geographic |
Antarctic Buttress |
geographic_facet |
Antarctic Buttress |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves |
op_relation |
http://www.osti.gov/servlets/purl/1855137 https://www.osti.gov/biblio/1855137 https://doi.org/10.5194/tc-16-277-2022 doi:10.5194/tc-16-277-2022 |
op_doi |
https://doi.org/10.5194/tc-16-277-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
1 |
container_start_page |
277 |
op_container_end_page |
295 |
_version_ |
1772814183644004352 |