Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades
A borehole temperature record from the Mill Island (East Antarctica) icecap reveals a large surface warming signal manifested as a 0.75K temperature difference over the approximate 100m depth in the zone of zero annual amplitude below the seasonally varying zone. The temperature profile shows a brea...
Published in: | The Cryosphere |
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Language: | English |
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2013
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Online Access: | https://researchers.mq.edu.au/en/publications/e5bcb53c-8428-49e9-bca2-1c524877eed4 https://doi.org/10.5194/tc-7-263-2013 http://www.scopus.com/inward/record.url?scp=84886680815&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/e5bcb53c-8428-49e9-bca2-1c524877eed4 2024-06-23T07:46:50+00:00 Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades Roberts, J. L. Moy, A. D. Van Ommen, T. D. Curran, M. A J Worby, A. P. Goodwin, I. D. Inoue, M. 2013-02-11 https://researchers.mq.edu.au/en/publications/e5bcb53c-8428-49e9-bca2-1c524877eed4 https://doi.org/10.5194/tc-7-263-2013 http://www.scopus.com/inward/record.url?scp=84886680815&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Roberts , J L , Moy , A D , Van Ommen , T D , Curran , M A J , Worby , A P , Goodwin , I D & Inoue , M 2013 , ' Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades ' , Cryosphere , vol. 7 , no. 1 , pp. 263-273 . https://doi.org/10.5194/tc-7-263-2013 article 2013 ftmacquarieunicr https://doi.org/10.5194/tc-7-263-2013 2024-06-12T23:47:20Z A borehole temperature record from the Mill Island (East Antarctica) icecap reveals a large surface warming signal manifested as a 0.75K temperature difference over the approximate 100m depth in the zone of zero annual amplitude below the seasonally varying zone. The temperature profile shows a break in gradient around 49m depth, which we model with inverse numerical simulations, indicating that surface warming started around the austral summer of 1980/81AD±5 yr. This warming of approximately 0.37K per decade is consistent with trends seen in both instrumental and other reconstructions for Antarctica and, therefore, suggests that regional- rather than local-scale processes are largely responsible. Alteration of the surface energy budget arising from changes in radiation balances due to local cloud, the amount of liquid deposition and local air temperatures associated with altered air/sea exchanges also potentially plays a role at this location due to the proximity of the Shackleton Ice Shelf and sea-ice zone. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ice Shelf Mill Island Sea ice Shackleton Ice Shelf Macquarie University Research Portal Austral East Antarctica Mill Island ENVELOPE(100.667,100.667,-65.500,-65.500) Shackleton Shackleton Ice Shelf ENVELOPE(100.504,100.504,-65.996,-65.996) The Cryosphere 7 1 263 273 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
description |
A borehole temperature record from the Mill Island (East Antarctica) icecap reveals a large surface warming signal manifested as a 0.75K temperature difference over the approximate 100m depth in the zone of zero annual amplitude below the seasonally varying zone. The temperature profile shows a break in gradient around 49m depth, which we model with inverse numerical simulations, indicating that surface warming started around the austral summer of 1980/81AD±5 yr. This warming of approximately 0.37K per decade is consistent with trends seen in both instrumental and other reconstructions for Antarctica and, therefore, suggests that regional- rather than local-scale processes are largely responsible. Alteration of the surface energy budget arising from changes in radiation balances due to local cloud, the amount of liquid deposition and local air temperatures associated with altered air/sea exchanges also potentially plays a role at this location due to the proximity of the Shackleton Ice Shelf and sea-ice zone. |
format |
Article in Journal/Newspaper |
author |
Roberts, J. L. Moy, A. D. Van Ommen, T. D. Curran, M. A J Worby, A. P. Goodwin, I. D. Inoue, M. |
spellingShingle |
Roberts, J. L. Moy, A. D. Van Ommen, T. D. Curran, M. A J Worby, A. P. Goodwin, I. D. Inoue, M. Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades |
author_facet |
Roberts, J. L. Moy, A. D. Van Ommen, T. D. Curran, M. A J Worby, A. P. Goodwin, I. D. Inoue, M. |
author_sort |
Roberts, J. L. |
title |
Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades |
title_short |
Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades |
title_full |
Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades |
title_fullStr |
Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades |
title_full_unstemmed |
Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades |
title_sort |
borehole temperatures reveal a changed energy budget at mill island, east antarctica, over recent decades |
publishDate |
2013 |
url |
https://researchers.mq.edu.au/en/publications/e5bcb53c-8428-49e9-bca2-1c524877eed4 https://doi.org/10.5194/tc-7-263-2013 http://www.scopus.com/inward/record.url?scp=84886680815&partnerID=8YFLogxK |
long_lat |
ENVELOPE(100.667,100.667,-65.500,-65.500) ENVELOPE(100.504,100.504,-65.996,-65.996) |
geographic |
Austral East Antarctica Mill Island Shackleton Shackleton Ice Shelf |
geographic_facet |
Austral East Antarctica Mill Island Shackleton Shackleton Ice Shelf |
genre |
Antarc* Antarctica East Antarctica Ice Shelf Mill Island Sea ice Shackleton Ice Shelf |
genre_facet |
Antarc* Antarctica East Antarctica Ice Shelf Mill Island Sea ice Shackleton Ice Shelf |
op_source |
Roberts , J L , Moy , A D , Van Ommen , T D , Curran , M A J , Worby , A P , Goodwin , I D & Inoue , M 2013 , ' Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades ' , Cryosphere , vol. 7 , no. 1 , pp. 263-273 . https://doi.org/10.5194/tc-7-263-2013 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.5194/tc-7-263-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
1 |
container_start_page |
263 |
op_container_end_page |
273 |
_version_ |
1802648524653854720 |