Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica
The catchments of Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are two of the largest, most rapidly changing, and potentially unstable sectors of the West Antarctic Ice Sheet. They are also neighboring outlets, separated by the topographically unconfined eastern shear margi...
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International Glaciological Society
2018
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Online Access: | http://nora.nerc.ac.uk/id/eprint/520839/ https://nora.nerc.ac.uk/id/eprint/520839/1/Schroeder.pdf https://doi.org/10.1017/aog.2017.45 |
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ftnerc:oai:nora.nerc.ac.uk:520839 2023-05-15T13:24:03+02:00 Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica Schroeder, Dustin M. Hilger, Andrew M. Paden, John D. Young, Duncan A. Corr, Hugh F.J. 2018-07 text http://nora.nerc.ac.uk/id/eprint/520839/ https://nora.nerc.ac.uk/id/eprint/520839/1/Schroeder.pdf https://doi.org/10.1017/aog.2017.45 en eng International Glaciological Society https://nora.nerc.ac.uk/id/eprint/520839/1/Schroeder.pdf Schroeder, Dustin M.; Hilger, Andrew M.; Paden, John D.; Young, Duncan A.; Corr, Hugh F.J. 2018 Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica. Annals of Glaciology, 59 (76, pt1). 10-15. https://doi.org/10.1017/aog.2017.45 <https://doi.org/10.1017/aog.2017.45> cc_by_4 CC-BY Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1017/aog.2017.45 2023-02-04T19:46:58Z The catchments of Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are two of the largest, most rapidly changing, and potentially unstable sectors of the West Antarctic Ice Sheet. They are also neighboring outlets, separated by the topographically unconfined eastern shear margin of Thwaites Glacier and the southwest tributary of Pine Island Glacier. This tributary begins just downstream of the eastern shear margin and flows into the Pine Island ice shelf. As a result, it is a potential locus of interaction between the two glaciers and could result in cross-catchment feedback during the retreat of either. Here, we analyze relative basal reflectivity profiles from three radar sounding survey lines collected using the UTIG HiCARS radar system in 2004 and CReSIS MCoRDS radar system in 2012 and 2014 to investigate the extent and character of ocean access beneath the southwest tributary. These profiles provide evidence of ocean access ~12 km inland of the 1992–2011 InSAR-derived grounding line by 2014, suggesting either retreat since 2011 or the intrusion of ocean water kilometers inland of the grounding line. Article in Journal/Newspaper Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier Thwaites Glacier West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) Annals of Glaciology 59 76pt1 10 15 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The catchments of Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are two of the largest, most rapidly changing, and potentially unstable sectors of the West Antarctic Ice Sheet. They are also neighboring outlets, separated by the topographically unconfined eastern shear margin of Thwaites Glacier and the southwest tributary of Pine Island Glacier. This tributary begins just downstream of the eastern shear margin and flows into the Pine Island ice shelf. As a result, it is a potential locus of interaction between the two glaciers and could result in cross-catchment feedback during the retreat of either. Here, we analyze relative basal reflectivity profiles from three radar sounding survey lines collected using the UTIG HiCARS radar system in 2004 and CReSIS MCoRDS radar system in 2012 and 2014 to investigate the extent and character of ocean access beneath the southwest tributary. These profiles provide evidence of ocean access ~12 km inland of the 1992–2011 InSAR-derived grounding line by 2014, suggesting either retreat since 2011 or the intrusion of ocean water kilometers inland of the grounding line. |
format |
Article in Journal/Newspaper |
author |
Schroeder, Dustin M. Hilger, Andrew M. Paden, John D. Young, Duncan A. Corr, Hugh F.J. |
spellingShingle |
Schroeder, Dustin M. Hilger, Andrew M. Paden, John D. Young, Duncan A. Corr, Hugh F.J. Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica |
author_facet |
Schroeder, Dustin M. Hilger, Andrew M. Paden, John D. Young, Duncan A. Corr, Hugh F.J. |
author_sort |
Schroeder, Dustin M. |
title |
Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica |
title_short |
Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica |
title_full |
Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica |
title_fullStr |
Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica |
title_full_unstemmed |
Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica |
title_sort |
ocean access beneath the southwest tributary of pine island glacier, west antarctica |
publisher |
International Glaciological Society |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/520839/ https://nora.nerc.ac.uk/id/eprint/520839/1/Schroeder.pdf https://doi.org/10.1017/aog.2017.45 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
geographic |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Pine Island Glacier Thwaites Glacier |
geographic_facet |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Pine Island Glacier Thwaites Glacier |
genre |
Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier Thwaites Glacier West Antarctica |
genre_facet |
Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier Thwaites Glacier West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520839/1/Schroeder.pdf Schroeder, Dustin M.; Hilger, Andrew M.; Paden, John D.; Young, Duncan A.; Corr, Hugh F.J. 2018 Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica. Annals of Glaciology, 59 (76, pt1). 10-15. https://doi.org/10.1017/aog.2017.45 <https://doi.org/10.1017/aog.2017.45> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/aog.2017.45 |
container_title |
Annals of Glaciology |
container_volume |
59 |
container_issue |
76pt1 |
container_start_page |
10 |
op_container_end_page |
15 |
_version_ |
1766377183025037312 |