Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ...
AbstractWarmer and more persistent intrusions of Circumpolar Deep Water (CDW) onto the West Antarctic Peninsula are a key driver of the recent increase in ice shelf mass loss. The relatively warm and salty CDW is thought to be mixed up to the base of the ice shelves via shear‐driven turbulence where...
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2022
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Online Access: | https://dx.doi.org/10.17863/cam.82111 https://www.repository.cam.ac.uk/handle/1810/334693 |
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ftdatacite:10.17863/cam.82111 2024-02-27T08:33:15+00:00 Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ... Middleton, L Davis, PED Taylor, Nicholls, KW 2022 https://dx.doi.org/10.17863/cam.82111 https://www.repository.cam.ac.uk/handle/1810/334693 en eng American Geophysical Union (AGU) turbulence ice shelf boundary layer double diffusion article-journal ScholarlyArticle JournalArticle Article 2022 ftdatacite https://doi.org/10.17863/cam.82111 2024-02-01T15:03:26Z AbstractWarmer and more persistent intrusions of Circumpolar Deep Water (CDW) onto the West Antarctic Peninsula are a key driver of the recent increase in ice shelf mass loss. The relatively warm and salty CDW is thought to be mixed up to the base of the ice shelves via shear‐driven turbulence where it has a high capacity to melt the ice. We analyze data from a year‐long mooring beneath George VI Ice Shelf at a location where double‐diffusive layering was observed. The turbulent dissipation rates do not vary with mean flow speed, suggesting shear‐driven mixing is not the driver of basal melt at this site. Instead, we predict the observed dissipation using a new method that links along‐isopycnal stirring of temperature anomalies with double‐diffusive convection. Our work suggests that along‐isopycnal temperature variance may be a stronger indicator of melt than flow speed within strongly stratified ice shelf‐ocean boundary layers. ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula George VI Ice Shelf Ice Shelf Ice Shelves DataCite Metadata Store (German National Library of Science and Technology) Antarctic Antarctic Peninsula George VI Ice Shelf ENVELOPE(-67.840,-67.840,-71.692,-71.692) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
turbulence ice shelf boundary layer double diffusion |
spellingShingle |
turbulence ice shelf boundary layer double diffusion Middleton, L Davis, PED Taylor, Nicholls, KW Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ... |
topic_facet |
turbulence ice shelf boundary layer double diffusion |
description |
AbstractWarmer and more persistent intrusions of Circumpolar Deep Water (CDW) onto the West Antarctic Peninsula are a key driver of the recent increase in ice shelf mass loss. The relatively warm and salty CDW is thought to be mixed up to the base of the ice shelves via shear‐driven turbulence where it has a high capacity to melt the ice. We analyze data from a year‐long mooring beneath George VI Ice Shelf at a location where double‐diffusive layering was observed. The turbulent dissipation rates do not vary with mean flow speed, suggesting shear‐driven mixing is not the driver of basal melt at this site. Instead, we predict the observed dissipation using a new method that links along‐isopycnal stirring of temperature anomalies with double‐diffusive convection. Our work suggests that along‐isopycnal temperature variance may be a stronger indicator of melt than flow speed within strongly stratified ice shelf‐ocean boundary layers. ... |
format |
Article in Journal/Newspaper |
author |
Middleton, L Davis, PED Taylor, Nicholls, KW |
author_facet |
Middleton, L Davis, PED Taylor, Nicholls, KW |
author_sort |
Middleton, L |
title |
Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ... |
title_short |
Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ... |
title_full |
Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ... |
title_fullStr |
Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ... |
title_full_unstemmed |
Double Diffusion As a Driver of Turbulence in the Stratified Boundary Layer Beneath George VI Ice Shelf ... |
title_sort |
double diffusion as a driver of turbulence in the stratified boundary layer beneath george vi ice shelf ... |
publisher |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://dx.doi.org/10.17863/cam.82111 https://www.repository.cam.ac.uk/handle/1810/334693 |
long_lat |
ENVELOPE(-67.840,-67.840,-71.692,-71.692) |
geographic |
Antarctic Antarctic Peninsula George VI Ice Shelf |
geographic_facet |
Antarctic Antarctic Peninsula George VI Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula George VI Ice Shelf Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctic Peninsula George VI Ice Shelf Ice Shelf Ice Shelves |
op_doi |
https://doi.org/10.17863/cam.82111 |
_version_ |
1792044786135334912 |