Basal melting and freezing under the Amery Ice Shelf, East Antarctica
The basal melting and freezing rates under the Amery Ice Shelf, East Antarctica, are evaluated, and their spatial distributions mapped. Ice velocity, surface elevation and accumulation rate datasets are employed in the analysis, along with a column-averaged ice density model. Our analysis shows that...
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ftunivtasecite:oai:ecite.utas.edu.au:71291 2023-05-15T13:21:59+02:00 Basal melting and freezing under the Amery Ice Shelf, East Antarctica Wen, JH Wang, YF Wang, WL Jezek, KC Liu, HX Allison, I 2010 https://doi.org/10.3189/002214310791190820 http://ecite.utas.edu.au/71291 en eng Int Glaciol Soc http://dx.doi.org/10.3189/002214310791190820 Wen, JH and Wang, YF and Wang, WL and Jezek, KC and Liu, HX and Allison, I, Basal melting and freezing under the Amery Ice Shelf, East Antarctica, Journal of Glaciology, 56, (195) pp. 81-90. ISSN 0022-1430 (2010) [Refereed Article] http://ecite.utas.edu.au/71291 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2010 ftunivtasecite https://doi.org/10.3189/002214310791190820 2019-12-13T21:38:44Z The basal melting and freezing rates under the Amery Ice Shelf, East Antarctica, are evaluated, and their spatial distributions mapped. Ice velocity, surface elevation and accumulation rate datasets are employed in the analysis, along with a column-averaged ice density model. Our analysis shows that the total area of basal melting is 34 700 km(2), with a total annual melt of 62.5 +/- 9.3 Gt and an average melting rate of 1.8 +/- 0.3 m a(-1). Basal freezing mainly occurs in the northwestern part of the ice shelf, over a total area of 26 100 km(2) and with a maximum freezing rate of 2.4 +/- 0.4 m a(-1). The total marine ice that accretes to the ice-shelf base is estimated to be 16.2 +/- 2.4 Gt a(-1). Using a redefined grounding line and geometry of the Amery Ice Shelf, we estimate the net melt over the ice-shelf base is about 46.4 +/- 6.9 Gt a(-1), which is higher than previous modeling and oceanographic estimates. Net basal melting accounts for about half of the total ice-shelf mass loss, with the rest being from iceberg discharge. Our basal melting and freezing distribution map provides a scientific basis for quantitative analysis of ice-ocean interaction at the ice-shelf-ocean interface. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctica Antarctica Journal East Antarctica Ice Shelf Journal of Glaciology eCite UTAS (University of Tasmania) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) East Antarctica Journal of Glaciology 56 195 81 90 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Wen, JH Wang, YF Wang, WL Jezek, KC Liu, HX Allison, I Basal melting and freezing under the Amery Ice Shelf, East Antarctica |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
The basal melting and freezing rates under the Amery Ice Shelf, East Antarctica, are evaluated, and their spatial distributions mapped. Ice velocity, surface elevation and accumulation rate datasets are employed in the analysis, along with a column-averaged ice density model. Our analysis shows that the total area of basal melting is 34 700 km(2), with a total annual melt of 62.5 +/- 9.3 Gt and an average melting rate of 1.8 +/- 0.3 m a(-1). Basal freezing mainly occurs in the northwestern part of the ice shelf, over a total area of 26 100 km(2) and with a maximum freezing rate of 2.4 +/- 0.4 m a(-1). The total marine ice that accretes to the ice-shelf base is estimated to be 16.2 +/- 2.4 Gt a(-1). Using a redefined grounding line and geometry of the Amery Ice Shelf, we estimate the net melt over the ice-shelf base is about 46.4 +/- 6.9 Gt a(-1), which is higher than previous modeling and oceanographic estimates. Net basal melting accounts for about half of the total ice-shelf mass loss, with the rest being from iceberg discharge. Our basal melting and freezing distribution map provides a scientific basis for quantitative analysis of ice-ocean interaction at the ice-shelf-ocean interface. |
format |
Article in Journal/Newspaper |
author |
Wen, JH Wang, YF Wang, WL Jezek, KC Liu, HX Allison, I |
author_facet |
Wen, JH Wang, YF Wang, WL Jezek, KC Liu, HX Allison, I |
author_sort |
Wen, JH |
title |
Basal melting and freezing under the Amery Ice Shelf, East Antarctica |
title_short |
Basal melting and freezing under the Amery Ice Shelf, East Antarctica |
title_full |
Basal melting and freezing under the Amery Ice Shelf, East Antarctica |
title_fullStr |
Basal melting and freezing under the Amery Ice Shelf, East Antarctica |
title_full_unstemmed |
Basal melting and freezing under the Amery Ice Shelf, East Antarctica |
title_sort |
basal melting and freezing under the amery ice shelf, east antarctica |
publisher |
Int Glaciol Soc |
publishDate |
2010 |
url |
https://doi.org/10.3189/002214310791190820 http://ecite.utas.edu.au/71291 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) |
geographic |
Amery Amery Ice Shelf East Antarctica |
geographic_facet |
Amery Amery Ice Shelf East Antarctica |
genre |
Amery Ice Shelf Antarc* Antarctica Antarctica Journal East Antarctica Ice Shelf Journal of Glaciology |
genre_facet |
Amery Ice Shelf Antarc* Antarctica Antarctica Journal East Antarctica Ice Shelf Journal of Glaciology |
op_relation |
http://dx.doi.org/10.3189/002214310791190820 Wen, JH and Wang, YF and Wang, WL and Jezek, KC and Liu, HX and Allison, I, Basal melting and freezing under the Amery Ice Shelf, East Antarctica, Journal of Glaciology, 56, (195) pp. 81-90. ISSN 0022-1430 (2010) [Refereed Article] http://ecite.utas.edu.au/71291 |
op_doi |
https://doi.org/10.3189/002214310791190820 |
container_title |
Journal of Glaciology |
container_volume |
56 |
container_issue |
195 |
container_start_page |
81 |
op_container_end_page |
90 |
_version_ |
1766362632957198336 |