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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2018-07-01
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| Series: | Annals of Glaciology |
| Subjects: | |
| Online Access: | https://www.cambridge.org/core/product/identifier/S0260305517000453/type/journal_article |
| _version_ | 1811157294159757312 |
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| author | Dustin M. Schroeder Andrew M. Hilger John D. Paden Duncan A. Young Hugh F. J. Corr |
| author_facet | Dustin M. Schroeder Andrew M. Hilger John D. Paden Duncan A. Young Hugh F. J. Corr |
| author_sort | Dustin M. Schroeder |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-10T05:04:53Z |
| format | Article |
| id | doaj.art-7f50ce51262d47e89164a4b8944ccb95 |
| institution | Directory Open Access Journal |
| issn | 0260-3055 1727-5644 |
| language | English |
| last_indexed | 2024-04-10T05:04:53Z |
| publishDate | 2018-07-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Annals of Glaciology |
| spelling | doaj.art-7f50ce51262d47e89164a4b8944ccb952023-03-09T12:27:32ZengCambridge University PressAnnals of Glaciology0260-30551727-56442018-07-0159101510.1017/aog.2017.45Ocean access beneath the southwest tributary of Pine Island Glacier, West AntarcticaDustin M. Schroeder0https://orcid.org/0000-0003-1916-3929Andrew M. Hilger1John D. Paden2Duncan A. Young3Hugh F. J. Corr4Department of Geophysics, Stanford University, Stanford, CA, USA E-mail: Department of Electrical Engineering, Stanford University, Stanford, CA, USADepartment of Electrical Engineering, Stanford University, Stanford, CA, USACenter for the Remote Sensing of Ice Sheets, University of Kansas, Lawrence, KS, USAInstitute for Geophysics, University of Texas, Austin, TX, USABritish Antarctic Survey, Natural Environment Research Council, Cambridge, UKThe 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.https://www.cambridge.org/core/product/identifier/S0260305517000453/type/journal_articleglaciological instruments and methodsground-penetrating radarice/ocean interactionsradio-echo soundingremote sensing |
| spellingShingle | Dustin M. Schroeder Andrew M. Hilger John D. Paden Duncan A. Young Hugh F. J. Corr Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica Annals of Glaciology glaciological instruments and methods ground-penetrating radar ice/ocean interactions radio-echo sounding remote sensing |
| title | 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_short | 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 |
| topic | glaciological instruments and methods ground-penetrating radar ice/ocean interactions radio-echo sounding remote sensing |
| url | https://www.cambridge.org/core/product/identifier/S0260305517000453/type/journal_article |
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