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...
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2022
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00059975 2023-05-15T13:37:33+02:00 Ice-shelf ocean boundary layer dynamics from large-eddy simulations Begeman, Carolyn Branecky Asay-Davis, Xylar Van Roekel, Luke 2022-01 electronic https://doi.org/10.5194/tc-16-277-2022 https://noa.gwlb.de/receive/cop_mods_00059975 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059624/tc-16-277-2022.pdf https://tc.copernicus.org/articles/16/277/2022/tc-16-277-2022.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-277-2022 https://noa.gwlb.de/receive/cop_mods_00059975 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059624/tc-16-277-2022.pdf https://tc.copernicus.org/articles/16/277/2022/tc-16-277-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-277-2022 2022-02-08T22:32:20Z 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. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic Buttress ENVELOPE(-57.083,-57.083,-63.550,-63.550) The Cryosphere 16 1 277 295 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Begeman, Carolyn Branecky Asay-Davis, Xylar Van Roekel, Luke Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
topic_facet |
article Verlagsveröffentlichung |
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. |
format |
Article in Journal/Newspaper |
author |
Begeman, Carolyn Branecky Asay-Davis, Xylar Van Roekel, Luke |
author_facet |
Begeman, Carolyn Branecky Asay-Davis, Xylar 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 |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-277-2022 https://noa.gwlb.de/receive/cop_mods_00059975 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059624/tc-16-277-2022.pdf https://tc.copernicus.org/articles/16/277/2022/tc-16-277-2022.pdf |
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 The Cryosphere |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-277-2022 https://noa.gwlb.de/receive/cop_mods_00059975 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059624/tc-16-277-2022.pdf https://tc.copernicus.org/articles/16/277/2022/tc-16-277-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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 |
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1766093889176862720 |