Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ...
Given the importance of the overturning circulation to global climate, there is a need to improve our understanding of Antarctic Bottom Water (AABW) formation and its sensitivity to change. The offshore properties of AABW are changing. Within the Australian-Antarctic basin AABW has freshened and dec...
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University Of Tasmania
2023
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Online Access: | https://dx.doi.org/10.25959/23239319 https://figshare.utas.edu.au/articles/thesis/Modelling_the_sensitivity_of_dense_shelf_water_formation_in_the_Mertz_Glacier_region_East_Antarctica/23239319 |
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ftdatacite:10.25959/23239319 2023-06-11T04:07:13+02:00 Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ... Cougnon, EA 2023 https://dx.doi.org/10.25959/23239319 https://figshare.utas.edu.au/articles/thesis/Modelling_the_sensitivity_of_dense_shelf_water_formation_in_the_Mertz_Glacier_region_East_Antarctica/23239319 unknown University Of Tasmania In Copyright http://rightsstatements.org/vocab/InC/1.0/ article-journal Text ScholarlyArticle Thesis 2023 ftdatacite https://doi.org/10.25959/23239319 2023-06-01T12:13:05Z Given the importance of the overturning circulation to global climate, there is a need to improve our understanding of Antarctic Bottom Water (AABW) formation and its sensitivity to change. The offshore properties of AABW are changing. Within the Australian-Antarctic basin AABW has freshened and decreased in volume by about 50% over the last few decades. Understanding what is driving these changes requires focusing on the key formation region along the Adelie and George V Land (AGVL) coast. Here, the intense production of sea ice in the Mertz Glacier Polynya system drives Dense Shelf Water (DSW) formation, the precursor to AABW. This thesis uses a version of the Regional Ocean Modeling System (ROMS) that has been adapted for ocean/ice-shelf interactions to explore the sensitivity of DSW formation to surface heat and salt fluxes and ice shelf basal melting. Interannual variability in surface heat and salt fluxes drives DSW export and ice shelf basal melting variability in the AGVL region. DSW export decreases ... Thesis Antarc* Antarctic Antarctica East Antarctica George V Land Ice Shelf Mertz Glacier Sea ice DataCite Metadata Store (German National Library of Science and Technology) Antarctic Australian Antarctic Basin ENVELOPE(120.000,120.000,-60.000,-60.000) Australian-Antarctic Basin ENVELOPE(134.115,134.115,-58.800,-58.800) East Antarctica George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
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description |
Given the importance of the overturning circulation to global climate, there is a need to improve our understanding of Antarctic Bottom Water (AABW) formation and its sensitivity to change. The offshore properties of AABW are changing. Within the Australian-Antarctic basin AABW has freshened and decreased in volume by about 50% over the last few decades. Understanding what is driving these changes requires focusing on the key formation region along the Adelie and George V Land (AGVL) coast. Here, the intense production of sea ice in the Mertz Glacier Polynya system drives Dense Shelf Water (DSW) formation, the precursor to AABW. This thesis uses a version of the Regional Ocean Modeling System (ROMS) that has been adapted for ocean/ice-shelf interactions to explore the sensitivity of DSW formation to surface heat and salt fluxes and ice shelf basal melting. Interannual variability in surface heat and salt fluxes drives DSW export and ice shelf basal melting variability in the AGVL region. DSW export decreases ... |
format |
Thesis |
author |
Cougnon, EA |
spellingShingle |
Cougnon, EA Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ... |
author_facet |
Cougnon, EA |
author_sort |
Cougnon, EA |
title |
Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ... |
title_short |
Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ... |
title_full |
Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ... |
title_fullStr |
Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ... |
title_full_unstemmed |
Modelling the sensitivity of dense shelf water formation in the Mertz Glacier region, East Antarctica ... |
title_sort |
modelling the sensitivity of dense shelf water formation in the mertz glacier region, east antarctica ... |
publisher |
University Of Tasmania |
publishDate |
2023 |
url |
https://dx.doi.org/10.25959/23239319 https://figshare.utas.edu.au/articles/thesis/Modelling_the_sensitivity_of_dense_shelf_water_formation_in_the_Mertz_Glacier_region_East_Antarctica/23239319 |
long_lat |
ENVELOPE(120.000,120.000,-60.000,-60.000) ENVELOPE(134.115,134.115,-58.800,-58.800) ENVELOPE(148.000,148.000,-68.500,-68.500) ENVELOPE(144.500,144.500,-67.667,-67.667) |
geographic |
Antarctic Australian Antarctic Basin Australian-Antarctic Basin East Antarctica George V Land Mertz Glacier |
geographic_facet |
Antarctic Australian Antarctic Basin Australian-Antarctic Basin East Antarctica George V Land Mertz Glacier |
genre |
Antarc* Antarctic Antarctica East Antarctica George V Land Ice Shelf Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica George V Land Ice Shelf Mertz Glacier Sea ice |
op_rights |
In Copyright http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.25959/23239319 |
_version_ |
1768380159647285248 |