NBP1402 diatom data
Abstract: Totten Glacier is the termination of the largest marine-based portion of the East Antarctic Ice Sheet, the Aurora Subglacial Basin. Yet little is known about the glacial evolution of the catchment and the factors influencing its present and past behavior. Due its remote location and heavy...
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IEDA: US Antarctic Program Data Center
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dataone:http://get.iedadata.org/metadata/iso/601061 2024-06-03T18:46:24+00:00 NBP1402 diatom data Leventer, Amy ENVELOPE(117.0,146.0,-66.0,-67.0) BEGINDATE: 2014-01-29T00:00:00Z ENDDATE: 2014-03-16T00:00:00Z 2017-10-13T00:00:00Z http://get.iedadata.org/metadata/iso/601061 unknown IEDA: US Antarctic Program Data Center NBP1402 Diatom Biology Paleoclimate Sample/Collection Description Antarctica Marine Sediments Southern Ocean Biosphere Cryosphere Oceans Totten Glacier US Antarctic Program Data Center (USAP-DC) Dataset 2017 dataone:urn:node:IEDA_USAP 2024-06-03T18:11:58Z Abstract: Totten Glacier is the termination of the largest marine-based portion of the East Antarctic Ice Sheet, the Aurora Subglacial Basin. Yet little is known about the glacial evolution of the catchment and the factors influencing its present and past behavior. Due its remote location and heavy sea ice, the continental shelf in front of the Totten Glacier had not been comprehensively surveyed prior to this study. Satellite observations indicate that the Totten ice drainage system is thinning, and it has been hypothesized that this thinning is in response to undermelting by warm ocean waters over the continental shelf. While this process is observed elsewhere in Antarctica (e.g. the rapidly retreating Pine Island Glacier in West Antarctica), the Totten Glacier system is potentially Antarctica's most important glacial drainage system due to its large size; it is three times larger than any system in West Antarctica. </br>The main goals of this proposal were: </br>To generate multibeam bathymetric maps of the continental shelf proximal to the Totten Glacier system to understand the recent regional glacial history and to document the pathways, if any, for circumpolar deep water to move onto the shelf. </br>To conduct a physical oceanographic survey of the region proximal to the Totten Glacier system, to determine the presence, if any, of warm ocean waters over the continental shelf.</br>To conduct a seismic survey of the continental shelf to assess the long-term evolution of the glacial system in the Aurora Subglacial Basin.</br>To collect marine sediment cores to determine the regional deglacial to Holocene climate history and the influence of warm circumpolar deep water. Dataset Antarc* Antarctic Antarctica Ice Sheet Pine Island Pine Island Glacier Sea ice Southern Ocean Totten Glacier West Antarctica IEDA: US Antarctic Program Data Center (via DataONE) Antarctic Southern Ocean West Antarctica East Antarctic Ice Sheet Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) ENVELOPE(117.0,146.0,-66.0,-67.0) |
institution |
Open Polar |
collection |
IEDA: US Antarctic Program Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:IEDA_USAP |
language |
unknown |
topic |
NBP1402 Diatom Biology Paleoclimate Sample/Collection Description Antarctica Marine Sediments Southern Ocean Biosphere Cryosphere Oceans Totten Glacier US Antarctic Program Data Center (USAP-DC) |
spellingShingle |
NBP1402 Diatom Biology Paleoclimate Sample/Collection Description Antarctica Marine Sediments Southern Ocean Biosphere Cryosphere Oceans Totten Glacier US Antarctic Program Data Center (USAP-DC) Leventer, Amy NBP1402 diatom data |
topic_facet |
NBP1402 Diatom Biology Paleoclimate Sample/Collection Description Antarctica Marine Sediments Southern Ocean Biosphere Cryosphere Oceans Totten Glacier US Antarctic Program Data Center (USAP-DC) |
description |
Abstract: Totten Glacier is the termination of the largest marine-based portion of the East Antarctic Ice Sheet, the Aurora Subglacial Basin. Yet little is known about the glacial evolution of the catchment and the factors influencing its present and past behavior. Due its remote location and heavy sea ice, the continental shelf in front of the Totten Glacier had not been comprehensively surveyed prior to this study. Satellite observations indicate that the Totten ice drainage system is thinning, and it has been hypothesized that this thinning is in response to undermelting by warm ocean waters over the continental shelf. While this process is observed elsewhere in Antarctica (e.g. the rapidly retreating Pine Island Glacier in West Antarctica), the Totten Glacier system is potentially Antarctica's most important glacial drainage system due to its large size; it is three times larger than any system in West Antarctica. </br>The main goals of this proposal were: </br>To generate multibeam bathymetric maps of the continental shelf proximal to the Totten Glacier system to understand the recent regional glacial history and to document the pathways, if any, for circumpolar deep water to move onto the shelf. </br>To conduct a physical oceanographic survey of the region proximal to the Totten Glacier system, to determine the presence, if any, of warm ocean waters over the continental shelf.</br>To conduct a seismic survey of the continental shelf to assess the long-term evolution of the glacial system in the Aurora Subglacial Basin.</br>To collect marine sediment cores to determine the regional deglacial to Holocene climate history and the influence of warm circumpolar deep water. |
format |
Dataset |
author |
Leventer, Amy |
author_facet |
Leventer, Amy |
author_sort |
Leventer, Amy |
title |
NBP1402 diatom data |
title_short |
NBP1402 diatom data |
title_full |
NBP1402 diatom data |
title_fullStr |
NBP1402 diatom data |
title_full_unstemmed |
NBP1402 diatom data |
title_sort |
nbp1402 diatom data |
publisher |
IEDA: US Antarctic Program Data Center |
publishDate |
2017 |
url |
http://get.iedadata.org/metadata/iso/601061 |
op_coverage |
ENVELOPE(117.0,146.0,-66.0,-67.0) BEGINDATE: 2014-01-29T00:00:00Z ENDDATE: 2014-03-16T00:00:00Z |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(116.333,116.333,-66.833,-66.833) ENVELOPE(117.0,146.0,-66.0,-67.0) |
geographic |
Antarctic Southern Ocean West Antarctica East Antarctic Ice Sheet Pine Island Glacier Totten Glacier |
geographic_facet |
Antarctic Southern Ocean West Antarctica East Antarctic Ice Sheet Pine Island Glacier Totten Glacier |
genre |
Antarc* Antarctic Antarctica Ice Sheet Pine Island Pine Island Glacier Sea ice Southern Ocean Totten Glacier West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Pine Island Pine Island Glacier Sea ice Southern Ocean Totten Glacier West Antarctica |
_version_ |
1800872799328272384 |