A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea
Abstract: This award supports a project to develop a better understanding of the response of the WAIS to climate change. The timing of the last deglaciation of the western Ross Sea will be improved using in situ terrestrial cosmogenic nuclides (3He, 10Be, 14C, 26Al, 36Cl) to date glacial erratics at...
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dataone:http://get.iedadata.org/metadata/iso/600123 2024-06-03T18:46:24+00:00 A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea Kurz, Mark D. Curtice, Josh ENVELOPE(163.4,169.248,-77.47989,-78.338) BEGINDATE: 2011-07-01T00:00:00Z ENDDATE: 2015-06-30T00:00:00Z 2015-01-01T00:00:00Z http://get.iedadata.org/metadata/iso/600123 unknown IEDA: US Antarctic Program Data Center Cosmogenic Dating Antarctic Glaciology Sample/Collection Description Antarctica Southern Ocean Cryosphere Ross Sea WAIS US Antarctic Program Data Center (USAP-DC) Dataset 2015 dataone:urn:node:IEDA_USAP 2024-06-03T18:11:58Z Abstract: This award supports a project to develop a better understanding of the response of the WAIS to climate change. The timing of the last deglaciation of the western Ross Sea will be improved using in situ terrestrial cosmogenic nuclides (3He, 10Be, 14C, 26Al, 36Cl) to date glacial erratics at key areas and elevations along the western Ross Sea coast. A state-of-the art ice sheet-shelf model will be used to identify mechanisms of deglaciation of the Ross Sea sector of WAIS. The model results and forcing will be compared with observations including the new cosmogenic data proposed here, with the aim of better determining and understanding the history and causes of WAIS deglaciation in the Ross Sea. There is considerable uncertainty, however, in the history of grounding line retreat from its last glacial maximum position, and virtually nothing is known about the timing of ice- surface lowering prior to ~10,000 years ago. Given these uncertainties, we are currently unable to assess one of the most important questions regarding the last deglaciation of the global ice sheets, namely as to whether the Ross Sea sector of WAIS contributed significantly to meltwater pulse 1A (MWP-1A), an extraordinarily rapid (~500-year duration) episode of ~20 m sea-level rise that occurred ~14,500 years ago. The intellectual merit of this project is that recent observations of startling changes at the margins of the Greenland and Antarctic ice sheets indicate that dynamic responses to warming may play a much greater role in the future mass balance of ice sheets than considered in current numerical projections of sea level rise. The broader impacts of this work are that it has direct societal relevance to developing an improved understanding of the response of the West Antarctic ice sheet to current and possible future environmental changes including the sea-level response to glacier and ice sheet melting due to global warming. The PI will communicate results from this project to a variety of audiences through the publication of peer-reviewed papers and by giving talks to public audiences. Finally the project will support a graduate student and undergraduate students in all phases of field-work, laboratory work and data interpretation. Dataset Antarc* Antarctic Antarctica glacier Greenland Ice Sheet Ross Sea Southern Ocean IEDA: US Antarctic Program Data Center (via DataONE) Antarctic Southern Ocean Ross Sea West Antarctic Ice Sheet Greenland ENVELOPE(163.4,169.248,-77.47989,-78.338) |
institution |
Open Polar |
collection |
IEDA: US Antarctic Program Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:IEDA_USAP |
language |
unknown |
topic |
Cosmogenic Dating Antarctic Glaciology Sample/Collection Description Antarctica Southern Ocean Cryosphere Ross Sea WAIS US Antarctic Program Data Center (USAP-DC) |
spellingShingle |
Cosmogenic Dating Antarctic Glaciology Sample/Collection Description Antarctica Southern Ocean Cryosphere Ross Sea WAIS US Antarctic Program Data Center (USAP-DC) Kurz, Mark D. Curtice, Josh A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea |
topic_facet |
Cosmogenic Dating Antarctic Glaciology Sample/Collection Description Antarctica Southern Ocean Cryosphere Ross Sea WAIS US Antarctic Program Data Center (USAP-DC) |
description |
Abstract: This award supports a project to develop a better understanding of the response of the WAIS to climate change. The timing of the last deglaciation of the western Ross Sea will be improved using in situ terrestrial cosmogenic nuclides (3He, 10Be, 14C, 26Al, 36Cl) to date glacial erratics at key areas and elevations along the western Ross Sea coast. A state-of-the art ice sheet-shelf model will be used to identify mechanisms of deglaciation of the Ross Sea sector of WAIS. The model results and forcing will be compared with observations including the new cosmogenic data proposed here, with the aim of better determining and understanding the history and causes of WAIS deglaciation in the Ross Sea. There is considerable uncertainty, however, in the history of grounding line retreat from its last glacial maximum position, and virtually nothing is known about the timing of ice- surface lowering prior to ~10,000 years ago. Given these uncertainties, we are currently unable to assess one of the most important questions regarding the last deglaciation of the global ice sheets, namely as to whether the Ross Sea sector of WAIS contributed significantly to meltwater pulse 1A (MWP-1A), an extraordinarily rapid (~500-year duration) episode of ~20 m sea-level rise that occurred ~14,500 years ago. The intellectual merit of this project is that recent observations of startling changes at the margins of the Greenland and Antarctic ice sheets indicate that dynamic responses to warming may play a much greater role in the future mass balance of ice sheets than considered in current numerical projections of sea level rise. The broader impacts of this work are that it has direct societal relevance to developing an improved understanding of the response of the West Antarctic ice sheet to current and possible future environmental changes including the sea-level response to glacier and ice sheet melting due to global warming. The PI will communicate results from this project to a variety of audiences through the publication of peer-reviewed papers and by giving talks to public audiences. Finally the project will support a graduate student and undergraduate students in all phases of field-work, laboratory work and data interpretation. |
format |
Dataset |
author |
Kurz, Mark D. Curtice, Josh |
author_facet |
Kurz, Mark D. Curtice, Josh |
author_sort |
Kurz, Mark D. |
title |
A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea |
title_short |
A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea |
title_full |
A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea |
title_fullStr |
A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea |
title_full_unstemmed |
A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea |
title_sort |
new reconstruction of the last west antarctic ice sheet deglaciation in the ross sea |
publisher |
IEDA: US Antarctic Program Data Center |
publishDate |
2015 |
url |
http://get.iedadata.org/metadata/iso/600123 |
op_coverage |
ENVELOPE(163.4,169.248,-77.47989,-78.338) BEGINDATE: 2011-07-01T00:00:00Z ENDDATE: 2015-06-30T00:00:00Z |
long_lat |
ENVELOPE(163.4,169.248,-77.47989,-78.338) |
geographic |
Antarctic Southern Ocean Ross Sea West Antarctic Ice Sheet Greenland |
geographic_facet |
Antarctic Southern Ocean Ross Sea West Antarctic Ice Sheet Greenland |
genre |
Antarc* Antarctic Antarctica glacier Greenland Ice Sheet Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica glacier Greenland Ice Sheet Ross Sea Southern Ocean |
_version_ |
1800872600872681472 |