Sediment echosounding data files from the Amundsen Sea
The flow of ice streams, which account for most discharge from large ice sheets, is controlled by processes operating at their bed. Data from modern ice stream beds are difficult to obtain, but where ice advanced onto continental shelves during glacial periods extensive areas of the former bed can b...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.708219 2023-05-15T13:23:54+02:00 Sediment echosounding data files from the Amundsen Sea Larter, Robert D Graham, Alastair G C Gohl, Karsten Kuhn, Gerhard Hillenbrand, Claus-Dieter Smith, James A Deen, Tara J Livermore, Roy A Schenke, Hans Werner MEDIAN LATITUDE: -73.108492 * MEDIAN LONGITUDE: -109.584950 * SOUTH-BOUND LATITUDE: -74.571100 * WEST-BOUND LONGITUDE: -118.798300 * NORTH-BOUND LATITUDE: -70.494100 * EAST-BOUND LONGITUDE: -102.596500 * DATE/TIME START: 2006-02-23T12:00:00 * DATE/TIME END: 2006-03-18T12:00:00 2009-06-11 text/tab-separated-values, 72 data points https://doi.pangaea.de/10.1594/PANGAEA.708219 https://doi.org/10.1594/PANGAEA.708219 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.708219 https://doi.org/10.1594/PANGAEA.708219 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Larter, Robert D; Graham, Alastair G C; Gohl, Karsten; Kuhn, Gerhard; Hillenbrand, Claus-Dieter; Smith, James A; Deen, Tara J; Livermore, Roy A; Schenke, Hans Werner (2009): Subglacial bedforms reveal complex basal regime in a zone of paleo-ice stream convergence, Amundsen Sea Embayment, West Antarctica. Geology, 37(5), 411-414, https://doi.org/10.1130/G25505A.1 ANT-XXIII/4 AWI_Paleo Course CT DATE/TIME LATITUDE LONGITUDE Paleoenvironmental Reconstructions from Marine Sediments @ AWI ParaSound (Atlas Hydrographic) Polarstern PS69 PS69/4-track Speed Underway cruise track measurements Uniform resource locator/link to raw data file Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.708219 https://doi.org/10.1130/G25505A.1 2023-01-20T08:47:01Z The flow of ice streams, which account for most discharge from large ice sheets, is controlled by processes operating at their bed. Data from modern ice stream beds are difficult to obtain, but where ice advanced onto continental shelves during glacial periods extensive areas of the former bed can be imaged using modern swath sonar tools. We present new multibeam swath bathymetry data analyzed alongside sparse pre-existing data from the Amundsen Sea Embayment. The compilation is the most extensive, continuous area of multibeam data coverage yet obtained on the inner continental shelf of Antarctica. The data reveal streamlined subglacial bedforms that define a zone of paleo-ice stream convergence but, in contrast to previous models, do not show a simple down-flow progression of bedform types along paleo-ice stream troughs. We interpret high spatial variability of bedforms as indicating a complex mechanical and hydrodynamic regime at the former ice stream beds, consistent with observations from some modern ice streams. We conclude that care must be taken when using bedforms to infer paleo-ice stream velocities. Dataset Amundsen Sea Antarc* Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Amundsen Sea ENVELOPE(-118.798300,-102.596500,-70.494100,-74.571100) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XXIII/4 AWI_Paleo Course CT DATE/TIME LATITUDE LONGITUDE Paleoenvironmental Reconstructions from Marine Sediments @ AWI ParaSound (Atlas Hydrographic) Polarstern PS69 PS69/4-track Speed Underway cruise track measurements Uniform resource locator/link to raw data file |
spellingShingle |
ANT-XXIII/4 AWI_Paleo Course CT DATE/TIME LATITUDE LONGITUDE Paleoenvironmental Reconstructions from Marine Sediments @ AWI ParaSound (Atlas Hydrographic) Polarstern PS69 PS69/4-track Speed Underway cruise track measurements Uniform resource locator/link to raw data file Larter, Robert D Graham, Alastair G C Gohl, Karsten Kuhn, Gerhard Hillenbrand, Claus-Dieter Smith, James A Deen, Tara J Livermore, Roy A Schenke, Hans Werner Sediment echosounding data files from the Amundsen Sea |
topic_facet |
ANT-XXIII/4 AWI_Paleo Course CT DATE/TIME LATITUDE LONGITUDE Paleoenvironmental Reconstructions from Marine Sediments @ AWI ParaSound (Atlas Hydrographic) Polarstern PS69 PS69/4-track Speed Underway cruise track measurements Uniform resource locator/link to raw data file |
description |
The flow of ice streams, which account for most discharge from large ice sheets, is controlled by processes operating at their bed. Data from modern ice stream beds are difficult to obtain, but where ice advanced onto continental shelves during glacial periods extensive areas of the former bed can be imaged using modern swath sonar tools. We present new multibeam swath bathymetry data analyzed alongside sparse pre-existing data from the Amundsen Sea Embayment. The compilation is the most extensive, continuous area of multibeam data coverage yet obtained on the inner continental shelf of Antarctica. The data reveal streamlined subglacial bedforms that define a zone of paleo-ice stream convergence but, in contrast to previous models, do not show a simple down-flow progression of bedform types along paleo-ice stream troughs. We interpret high spatial variability of bedforms as indicating a complex mechanical and hydrodynamic regime at the former ice stream beds, consistent with observations from some modern ice streams. We conclude that care must be taken when using bedforms to infer paleo-ice stream velocities. |
format |
Dataset |
author |
Larter, Robert D Graham, Alastair G C Gohl, Karsten Kuhn, Gerhard Hillenbrand, Claus-Dieter Smith, James A Deen, Tara J Livermore, Roy A Schenke, Hans Werner |
author_facet |
Larter, Robert D Graham, Alastair G C Gohl, Karsten Kuhn, Gerhard Hillenbrand, Claus-Dieter Smith, James A Deen, Tara J Livermore, Roy A Schenke, Hans Werner |
author_sort |
Larter, Robert D |
title |
Sediment echosounding data files from the Amundsen Sea |
title_short |
Sediment echosounding data files from the Amundsen Sea |
title_full |
Sediment echosounding data files from the Amundsen Sea |
title_fullStr |
Sediment echosounding data files from the Amundsen Sea |
title_full_unstemmed |
Sediment echosounding data files from the Amundsen Sea |
title_sort |
sediment echosounding data files from the amundsen sea |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.708219 https://doi.org/10.1594/PANGAEA.708219 |
op_coverage |
MEDIAN LATITUDE: -73.108492 * MEDIAN LONGITUDE: -109.584950 * SOUTH-BOUND LATITUDE: -74.571100 * WEST-BOUND LONGITUDE: -118.798300 * NORTH-BOUND LATITUDE: -70.494100 * EAST-BOUND LONGITUDE: -102.596500 * DATE/TIME START: 2006-02-23T12:00:00 * DATE/TIME END: 2006-03-18T12:00:00 |
long_lat |
ENVELOPE(-118.798300,-102.596500,-70.494100,-74.571100) |
geographic |
Amundsen Sea |
geographic_facet |
Amundsen Sea |
genre |
Amundsen Sea Antarc* Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica |
op_source |
Supplement to: Larter, Robert D; Graham, Alastair G C; Gohl, Karsten; Kuhn, Gerhard; Hillenbrand, Claus-Dieter; Smith, James A; Deen, Tara J; Livermore, Roy A; Schenke, Hans Werner (2009): Subglacial bedforms reveal complex basal regime in a zone of paleo-ice stream convergence, Amundsen Sea Embayment, West Antarctica. Geology, 37(5), 411-414, https://doi.org/10.1130/G25505A.1 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.708219 https://doi.org/10.1594/PANGAEA.708219 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.708219 https://doi.org/10.1130/G25505A.1 |
_version_ |
1766376219618574336 |