Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica
Increasing evidence for an elaborate subglacial drainage network underneath modern Antarctic ice sheets suggests that basal meltwater has an important influence on ice stream flow. Swath bathymetry surveys from previously glaciated continental margins display morphological features indicative of sub...
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2013
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00023404 2023-05-15T13:23:51+02:00 Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica Nitsche, F. O. Gohl, K. Larter, R. D. Hillenbrand, C.-D. Kuhn, G. Smith, J. A. Jacobs, S. Anderson, J. B. Jakobsson, M. 2013-02 electronic https://doi.org/10.5194/tc-7-249-2013 https://noa.gwlb.de/receive/cop_mods_00023404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023359/tc-7-249-2013.pdf https://tc.copernicus.org/articles/7/249/2013/tc-7-249-2013.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-249-2013 https://noa.gwlb.de/receive/cop_mods_00023404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023359/tc-7-249-2013.pdf https://tc.copernicus.org/articles/7/249/2013/tc-7-249-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/tc-7-249-2013 2022-02-08T22:50:38Z Increasing evidence for an elaborate subglacial drainage network underneath modern Antarctic ice sheets suggests that basal meltwater has an important influence on ice stream flow. Swath bathymetry surveys from previously glaciated continental margins display morphological features indicative of subglacial meltwater flow in inner shelf areas of some paleo ice stream troughs. Over the last few years several expeditions to the eastern Amundsen Sea embayment (West Antarctica) have investigated the paleo ice streams that extended from the Pine Island and Thwaites glaciers. A compilation of high-resolution swath bathymetry data from inner Pine Island Bay reveals details of a rough seabed topography including several deep channels that connect a series of basins. This complex basin and channel network is indicative of meltwater flow beneath the paleo-Pine Island and Thwaites ice streams, along with substantial subglacial water inflow from the east. This meltwater could have enhanced ice flow over the rough bedrock topography. Meltwater features diminish with the onset of linear features north of the basins. Similar features have previously been observed in several other areas, including the Dotson-Getz Trough (western Amundsen Sea embayment) and Marguerite Bay (SW Antarctic Peninsula), suggesting that these features may be widespread around the Antarctic margin and that subglacial meltwater drainage played a major role in past ice-sheet dynamics. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Pine Island Pine Island Bay The Cryosphere West Antarctica Niedersächsisches Online-Archiv NOA Amundsen Sea Antarctic Antarctic Peninsula Dotson-Getz Trough ENVELOPE(-114.775,-114.775,-73.231,-73.231) Getz ENVELOPE(-145.217,-145.217,-76.550,-76.550) Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) The Antarctic West Antarctica The Cryosphere 7 1 249 262 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
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topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Nitsche, F. O. Gohl, K. Larter, R. D. Hillenbrand, C.-D. Kuhn, G. Smith, J. A. Jacobs, S. Anderson, J. B. Jakobsson, M. Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
Increasing evidence for an elaborate subglacial drainage network underneath modern Antarctic ice sheets suggests that basal meltwater has an important influence on ice stream flow. Swath bathymetry surveys from previously glaciated continental margins display morphological features indicative of subglacial meltwater flow in inner shelf areas of some paleo ice stream troughs. Over the last few years several expeditions to the eastern Amundsen Sea embayment (West Antarctica) have investigated the paleo ice streams that extended from the Pine Island and Thwaites glaciers. A compilation of high-resolution swath bathymetry data from inner Pine Island Bay reveals details of a rough seabed topography including several deep channels that connect a series of basins. This complex basin and channel network is indicative of meltwater flow beneath the paleo-Pine Island and Thwaites ice streams, along with substantial subglacial water inflow from the east. This meltwater could have enhanced ice flow over the rough bedrock topography. Meltwater features diminish with the onset of linear features north of the basins. Similar features have previously been observed in several other areas, including the Dotson-Getz Trough (western Amundsen Sea embayment) and Marguerite Bay (SW Antarctic Peninsula), suggesting that these features may be widespread around the Antarctic margin and that subglacial meltwater drainage played a major role in past ice-sheet dynamics. |
format |
Article in Journal/Newspaper |
author |
Nitsche, F. O. Gohl, K. Larter, R. D. Hillenbrand, C.-D. Kuhn, G. Smith, J. A. Jacobs, S. Anderson, J. B. Jakobsson, M. |
author_facet |
Nitsche, F. O. Gohl, K. Larter, R. D. Hillenbrand, C.-D. Kuhn, G. Smith, J. A. Jacobs, S. Anderson, J. B. Jakobsson, M. |
author_sort |
Nitsche, F. O. |
title |
Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica |
title_short |
Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica |
title_full |
Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica |
title_fullStr |
Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica |
title_full_unstemmed |
Paleo ice flow and subglacial meltwater dynamics in Pine Island Bay, West Antarctica |
title_sort |
paleo ice flow and subglacial meltwater dynamics in pine island bay, west antarctica |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-249-2013 https://noa.gwlb.de/receive/cop_mods_00023404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023359/tc-7-249-2013.pdf https://tc.copernicus.org/articles/7/249/2013/tc-7-249-2013.pdf |
long_lat |
ENVELOPE(-114.775,-114.775,-73.231,-73.231) ENVELOPE(-145.217,-145.217,-76.550,-76.550) ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-68.000,-68.000,-68.500,-68.500) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Dotson-Getz Trough Getz Island Bay Marguerite Marguerite Bay Pine Island Bay The Antarctic West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Dotson-Getz Trough Getz Island Bay Marguerite Marguerite Bay Pine Island Bay The Antarctic West Antarctica |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Pine Island Pine Island Bay The Cryosphere West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Pine Island Pine Island Bay The Cryosphere West Antarctica |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-249-2013 https://noa.gwlb.de/receive/cop_mods_00023404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023359/tc-7-249-2013.pdf https://tc.copernicus.org/articles/7/249/2013/tc-7-249-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-7-249-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
1 |
container_start_page |
249 |
op_container_end_page |
262 |
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1766375906381660160 |