Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier
This award supports a project to investigate late Pleistocene and Holocene changes in Scott Glacier, a key outlet glacier that flows directly into the Ross Sea just west of the present-day West Antarctic Ice Sheet (WAIS) grounding line. The overarching goals are to understand changes in WAIS configu...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:orsp_reports-1298 2023-05-15T13:37:34+02:00 Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier Hall, Brenda L. 2010-07-13T07:00:00Z application/pdf https://digitalcommons.library.umaine.edu/orsp_reports/294 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1298&context=orsp_reports unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/orsp_reports/294 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1298&context=orsp_reports This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). University of Maine Office of Research Administration: Grant Reports Antarctic Glaciology Climate Change Glaciology text 2010 ftmaineuniv 2023-03-12T19:16:41Z This award supports a project to investigate late Pleistocene and Holocene changes in Scott Glacier, a key outlet glacier that flows directly into the Ross Sea just west of the present-day West Antarctic Ice Sheet (WAIS) grounding line. The overarching goals are to understand changes in WAIS configuration in the Ross Sea sector at and since the last glacial maximum (LGM) and to determine whether Holocene retreat observed in the Ross Embayment has ended or if it is still ongoing. To address these goals, moraine and drift sequences associated with Scott Glacier will be mapped and dated and ice thickness, surface velocity and surface mass balance will be measured to constrain an ice-flow model of the glacier. This model will be used to help interpret the dated geologic sequences. The intellectual merit of the project relates to gaining a better understanding of the West Antarctic Ice Sheet and how changing activity of fast-flowing outlet glaciers and ice streams exerts strong control on the mass balance of the ice sheet. Previous work suggests that grounding-line retreat in the Ross Sea continued into the late Holocene and left open the possibility of ongoing deglaciation as part of a long-term trend. Results from Reedy Glacier, an outlet glacier just behind the grounding line, suggest that retreat may have slowed substantially over the past 2000 years and perhaps even stopped. By coupling the work on Scott Glacier with recent data from Reedy Glacier, the grounding-line position will be bracketed and it should be possible to establish whether the retreat has truly ended or if it is ongoing. The broader impacts of the work relate to the societal relevance of an improved understanding of the West Antarctic ice sheet to establish how it will respond to current and possible future environmental changes. The work addresses this key goal of the West Antarctic Ice Sheet Initiative, as well as the International Polar Year focus on ice sheet history and dynamics. The work will develop future scientists through the education ... Text Antarc* Antarctic Ice Sheet International Polar Year Reedy Glacier Ross Sea Scott Glacier The University of Maine: DigitalCommons@UMaine Antarctic Ross Sea West Antarctic Ice Sheet Reedy Glacier ENVELOPE(-134.000,-134.000,-85.500,-85.500) |
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Open Polar |
collection |
The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Antarctic Glaciology Climate Change Glaciology |
spellingShingle |
Antarctic Glaciology Climate Change Glaciology Hall, Brenda L. Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier |
topic_facet |
Antarctic Glaciology Climate Change Glaciology |
description |
This award supports a project to investigate late Pleistocene and Holocene changes in Scott Glacier, a key outlet glacier that flows directly into the Ross Sea just west of the present-day West Antarctic Ice Sheet (WAIS) grounding line. The overarching goals are to understand changes in WAIS configuration in the Ross Sea sector at and since the last glacial maximum (LGM) and to determine whether Holocene retreat observed in the Ross Embayment has ended or if it is still ongoing. To address these goals, moraine and drift sequences associated with Scott Glacier will be mapped and dated and ice thickness, surface velocity and surface mass balance will be measured to constrain an ice-flow model of the glacier. This model will be used to help interpret the dated geologic sequences. The intellectual merit of the project relates to gaining a better understanding of the West Antarctic Ice Sheet and how changing activity of fast-flowing outlet glaciers and ice streams exerts strong control on the mass balance of the ice sheet. Previous work suggests that grounding-line retreat in the Ross Sea continued into the late Holocene and left open the possibility of ongoing deglaciation as part of a long-term trend. Results from Reedy Glacier, an outlet glacier just behind the grounding line, suggest that retreat may have slowed substantially over the past 2000 years and perhaps even stopped. By coupling the work on Scott Glacier with recent data from Reedy Glacier, the grounding-line position will be bracketed and it should be possible to establish whether the retreat has truly ended or if it is ongoing. The broader impacts of the work relate to the societal relevance of an improved understanding of the West Antarctic ice sheet to establish how it will respond to current and possible future environmental changes. The work addresses this key goal of the West Antarctic Ice Sheet Initiative, as well as the International Polar Year focus on ice sheet history and dynamics. The work will develop future scientists through the education ... |
format |
Text |
author |
Hall, Brenda L. |
author_facet |
Hall, Brenda L. |
author_sort |
Hall, Brenda L. |
title |
Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier |
title_short |
Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier |
title_full |
Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier |
title_fullStr |
Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier |
title_full_unstemmed |
Collaborative Research: Grounding-line Retreat in the Southern Ross Sea - Constraints from Scott Glacier |
title_sort |
collaborative research: grounding-line retreat in the southern ross sea - constraints from scott glacier |
publisher |
DigitalCommons@UMaine |
publishDate |
2010 |
url |
https://digitalcommons.library.umaine.edu/orsp_reports/294 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1298&context=orsp_reports |
long_lat |
ENVELOPE(-134.000,-134.000,-85.500,-85.500) |
geographic |
Antarctic Ross Sea West Antarctic Ice Sheet Reedy Glacier |
geographic_facet |
Antarctic Ross Sea West Antarctic Ice Sheet Reedy Glacier |
genre |
Antarc* Antarctic Ice Sheet International Polar Year Reedy Glacier Ross Sea Scott Glacier |
genre_facet |
Antarc* Antarctic Ice Sheet International Polar Year Reedy Glacier Ross Sea Scott Glacier |
op_source |
University of Maine Office of Research Administration: Grant Reports |
op_relation |
https://digitalcommons.library.umaine.edu/orsp_reports/294 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1298&context=orsp_reports |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
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1766094356035403776 |