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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ftdoajarticles:oai:doaj.org/article:4611e9c5c40c498cb1df8a249242ebc0 2023-05-15T14:05:17+02:00 Ice-shelf ocean boundary layer dynamics from large-eddy simulations C. B. Begeman X. Asay-Davis L. Van Roekel 2022-01-01T00:00:00Z https://doi.org/10.5194/tc-16-277-2022 https://doaj.org/article/4611e9c5c40c498cb1df8a249242ebc0 EN eng Copernicus Publications https://tc.copernicus.org/articles/16/277/2022/tc-16-277-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-277-2022 1994-0416 1994-0424 https://doaj.org/article/4611e9c5c40c498cb1df8a249242ebc0 The Cryosphere, Vol 16, Pp 277-295 (2022) Environmental sciences GE1-350 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/tc-16-277-2022 2022-12-31T10:50:55Z 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 Directory of Open Access Journals: DOAJ Articles Antarctic Buttress ENVELOPE(-57.083,-57.083,-63.550,-63.550) The Cryosphere 16 1 277 295 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 C. B. Begeman X. Asay-Davis L. Van Roekel Ice-shelf ocean boundary layer dynamics from large-eddy simulations |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 |
C. B. Begeman X. Asay-Davis L. Van Roekel |
author_facet |
C. B. Begeman X. Asay-Davis L. Van Roekel |
author_sort |
C. B. Begeman |
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://doaj.org/article/4611e9c5c40c498cb1df8a249242ebc0 |
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_source |
The Cryosphere, Vol 16, Pp 277-295 (2022) |
op_relation |
https://tc.copernicus.org/articles/16/277/2022/tc-16-277-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-277-2022 1994-0416 1994-0424 https://doaj.org/article/4611e9c5c40c498cb1df8a249242ebc0 |
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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1766277096880996352 |