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 0.75 K temperature difference over the approximate 100 m depth in the zone of zero annual amplitude below the seasonally varying zone. The temperature profile shows a br...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus GmbH
2013
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-7-263-2013 http://ecite.utas.edu.au/83213 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:83213 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:83213 2023-05-15T14:02:31+02:00 Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades Roberts, JL Moy, AD van Ommen, TD Curran, MAJ Worby, AP Goodwin, ID Inoue, M 2013 application/pdf https://doi.org/10.5194/tc-7-263-2013 http://ecite.utas.edu.au/83213 en eng Copernicus GmbH http://ecite.utas.edu.au/83213/1/tc-7-263-2013.pdf http://dx.doi.org/10.5194/tc-7-263-2013 Roberts, JL and Moy, AD and van Ommen, TD and Curran, MAJ and Worby, AP and Goodwin, ID and Inoue, M, Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades, The Cryosphere, 7 pp. 263-273. ISSN 1994-0416 (2013) [Refereed Article] http://ecite.utas.edu.au/83213 Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology Refereed Article PeerReviewed 2013 ftunivtasecite https://doi.org/10.5194/tc-7-263-2013 2019-12-13T21:47:55Z A borehole temperature record from the Mill Island (East Antarctica) icecap reveals a large surface warming signal manifested as a 0.75 K temperature difference over the approximate 100 m depth in the zone of zero annual amplitude below the seasonally varying zone. The temperature profile shows a break in gradient around 49 m depth, which we model with inverse numerical simulations, indicating that surface warming started around the austral summer of 1980/81 AD 5 yr. This warming of approximately 0.37 K 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 The Cryosphere eCite UTAS (University of Tasmania) 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 |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology Roberts, JL Moy, AD van Ommen, TD Curran, MAJ Worby, AP Goodwin, ID Inoue, M Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology |
description |
A borehole temperature record from the Mill Island (East Antarctica) icecap reveals a large surface warming signal manifested as a 0.75 K temperature difference over the approximate 100 m depth in the zone of zero annual amplitude below the seasonally varying zone. The temperature profile shows a break in gradient around 49 m depth, which we model with inverse numerical simulations, indicating that surface warming started around the austral summer of 1980/81 AD 5 yr. This warming of approximately 0.37 K 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, JL Moy, AD van Ommen, TD Curran, MAJ Worby, AP Goodwin, ID Inoue, M |
author_facet |
Roberts, JL Moy, AD van Ommen, TD Curran, MAJ Worby, AP Goodwin, ID Inoue, M |
author_sort |
Roberts, JL |
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 |
publisher |
Copernicus GmbH |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-263-2013 http://ecite.utas.edu.au/83213 |
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 The Cryosphere |
genre_facet |
Antarc* Antarctica East Antarctica Ice Shelf Mill Island Sea ice Shackleton Ice Shelf The Cryosphere |
op_relation |
http://ecite.utas.edu.au/83213/1/tc-7-263-2013.pdf http://dx.doi.org/10.5194/tc-7-263-2013 Roberts, JL and Moy, AD and van Ommen, TD and Curran, MAJ and Worby, AP and Goodwin, ID and Inoue, M, Borehole temperatures reveal a changed energy budget at Mill Island, East Antarctica, over recent decades, The Cryosphere, 7 pp. 263-273. ISSN 1994-0416 (2013) [Refereed Article] http://ecite.utas.edu.au/83213 |
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_ |
1766272820847837184 |