Regional changes in icescape impact shelf circulation and basal melting
Ice shelf basal melt is the dominant contribution to mass loss from Antarctic ice shelves. However, the sensitivity of basal melt to changes in icescape (grounded icebergs, ice shelves and sea ice) and related ocean circulation is poorly understood. Here, we simulate the impact of the major 2010 cal...
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Amer Geophysical Union
2017
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Online Access: | https://eprints.utas.edu.au/25978/ https://eprints.utas.edu.au/25978/1/122422%20final.pdf https://doi.org/10.1002/2017GL074943 |
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ftunivtasmania:oai:eprints.utas.edu.au:25978 2023-05-15T13:31:52+02:00 Regional changes in icescape impact shelf circulation and basal melting Cougnon, EA Galton-Fenzi, BK Rintoul, SR Legresy, B Williams, GD Fraser, AD Hunter, JR 2017 application/pdf https://eprints.utas.edu.au/25978/ https://eprints.utas.edu.au/25978/1/122422%20final.pdf https://doi.org/10.1002/2017GL074943 en eng Amer Geophysical Union https://eprints.utas.edu.au/25978/1/122422%20final.pdf Cougnon, EA orcid:0000-0002-8691-5935 , Galton-Fenzi, BK, Rintoul, SR orcid:0000-0002-7055-9876 , Legresy, B orcid:0000-0002-1909-1630 , Williams, GD orcid:0000-0003-1769-8356 , Fraser, AD orcid:0000-0003-1924-0015 and Hunter, JR 2017 , 'Regional changes in icescape impact shelf circulation and basal melting' , Geophysical Research Letters, vol. 44, no. 22 , 11,519-11,527 , doi:10.1002/2017GL074943 <http://dx.doi.org/10.1002/2017GL074943>. ocean-ice shelf interactions Mertz Glacier Antarctica regional icescape changes iceberg calving Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1002/2017GL074943 2021-09-13T22:17:08Z Ice shelf basal melt is the dominant contribution to mass loss from Antarctic ice shelves. However, the sensitivity of basal melt to changes in icescape (grounded icebergs, ice shelves and sea ice) and related ocean circulation is poorly understood. Here, we simulate the impact of the major 2010 calving event of the Mertz Glacier Tongue (MGT), East Antarctica, and related redistribution of sea ice and icebergs on the basal melt rate of the local ice shelves. We find that the position of the grounded tabular iceberg B9B controls the water masses that reach the nearby ice shelf cavities. After the calving of the MGT and the removal of B9B, warmer water is present both within the MGT cavity and on the continental shelf driving a 57% increase of the deep MGT basal melting. Major changes in icescape influence the oceanic heat flux responsible for basal ice shelf melting. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Iceberg* Mertz Glacier Sea ice University of Tasmania: UTas ePrints Antarctic East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) Geophysical Research Letters 44 22 11,519 11,527 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
ocean-ice shelf interactions Mertz Glacier Antarctica regional icescape changes iceberg calving |
spellingShingle |
ocean-ice shelf interactions Mertz Glacier Antarctica regional icescape changes iceberg calving Cougnon, EA Galton-Fenzi, BK Rintoul, SR Legresy, B Williams, GD Fraser, AD Hunter, JR Regional changes in icescape impact shelf circulation and basal melting |
topic_facet |
ocean-ice shelf interactions Mertz Glacier Antarctica regional icescape changes iceberg calving |
description |
Ice shelf basal melt is the dominant contribution to mass loss from Antarctic ice shelves. However, the sensitivity of basal melt to changes in icescape (grounded icebergs, ice shelves and sea ice) and related ocean circulation is poorly understood. Here, we simulate the impact of the major 2010 calving event of the Mertz Glacier Tongue (MGT), East Antarctica, and related redistribution of sea ice and icebergs on the basal melt rate of the local ice shelves. We find that the position of the grounded tabular iceberg B9B controls the water masses that reach the nearby ice shelf cavities. After the calving of the MGT and the removal of B9B, warmer water is present both within the MGT cavity and on the continental shelf driving a 57% increase of the deep MGT basal melting. Major changes in icescape influence the oceanic heat flux responsible for basal ice shelf melting. |
format |
Article in Journal/Newspaper |
author |
Cougnon, EA Galton-Fenzi, BK Rintoul, SR Legresy, B Williams, GD Fraser, AD Hunter, JR |
author_facet |
Cougnon, EA Galton-Fenzi, BK Rintoul, SR Legresy, B Williams, GD Fraser, AD Hunter, JR |
author_sort |
Cougnon, EA |
title |
Regional changes in icescape impact shelf circulation and basal melting |
title_short |
Regional changes in icescape impact shelf circulation and basal melting |
title_full |
Regional changes in icescape impact shelf circulation and basal melting |
title_fullStr |
Regional changes in icescape impact shelf circulation and basal melting |
title_full_unstemmed |
Regional changes in icescape impact shelf circulation and basal melting |
title_sort |
regional changes in icescape impact shelf circulation and basal melting |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/25978/ https://eprints.utas.edu.au/25978/1/122422%20final.pdf https://doi.org/10.1002/2017GL074943 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
Antarctic East Antarctica Mertz Glacier Mertz Glacier Tongue |
geographic_facet |
Antarctic East Antarctica Mertz Glacier Mertz Glacier Tongue |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Iceberg* Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Iceberg* Mertz Glacier Sea ice |
op_relation |
https://eprints.utas.edu.au/25978/1/122422%20final.pdf Cougnon, EA orcid:0000-0002-8691-5935 , Galton-Fenzi, BK, Rintoul, SR orcid:0000-0002-7055-9876 , Legresy, B orcid:0000-0002-1909-1630 , Williams, GD orcid:0000-0003-1769-8356 , Fraser, AD orcid:0000-0003-1924-0015 and Hunter, JR 2017 , 'Regional changes in icescape impact shelf circulation and basal melting' , Geophysical Research Letters, vol. 44, no. 22 , 11,519-11,527 , doi:10.1002/2017GL074943 <http://dx.doi.org/10.1002/2017GL074943>. |
op_doi |
https://doi.org/10.1002/2017GL074943 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
22 |
container_start_page |
11,519 |
op_container_end_page |
11,527 |
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1766021761340538880 |