Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017
Mass loss from the Greenland and Antarctic ice sheets is accelerating. Although ice sheet models have improved in recent years, much work is needed to make these models robust and efficient on continental scales and to quantify uncertainties in their projected outputs. The University of Texas at Aus...
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ftosti:oai:osti.gov:1464958 2023-07-30T03:59:10+02:00 Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017 Jackson, Charles Stadler, Georg Ghattas, Omar 2023-05-17 application/pdf http://www.osti.gov/servlets/purl/1464958 https://www.osti.gov/biblio/1464958 https://doi.org/10.2172/1464958 unknown http://www.osti.gov/servlets/purl/1464958 https://www.osti.gov/biblio/1464958 https://doi.org/10.2172/1464958 doi:10.2172/1464958 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.2172/1464958 2023-07-11T09:28:17Z Mass loss from the Greenland and Antarctic ice sheets is accelerating. Although ice sheet models have improved in recent years, much work is needed to make these models robust and efficient on continental scales and to quantify uncertainties in their projected outputs. The University of Texas at Austin's role in the PISCEES project is to provide guidance on how best to apply uncertainty quantification strategies to evaluating uncertainties in simulations of Greenland and Antarctic contributions to sea level rise in response to environmental forcing. Here we report on several activities that involved project members at UTA including Section 2.1 where we provide a broader overview of challenges to use UQ methods on ice ow modeling. Within Section 2.2 we describe the progress and challenges that remain for implementing important aspects of our "end-to-end" UQ work flow. In sum, we had a break-through in realizing the potential for implementing Active Subspace strategies making use of existing experiments exploring the sensitivity of the Greenland ice sheet flow to uncertain basal traction parameters. Section 2.3 presents progress that is being made to explore the effect of uncertainties in bed topography on stability of Thwaites basin, West Antarctica, using the BISICLES ice flow model. This effort is joint with Dan Martin at LBNL and a graduate student being co-mentored by Jackson. The results provide a compelling test case for the BISICLES ice flow model to address an important science question concerning the role of uncertain boundary conditions on ice sheet contributions to sea level rise. Other/Unknown Material Antarc* Antarctic Antarctica Greenland Ice Sheet West Antarctica SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic Austin Greenland West Antarctica |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Jackson, Charles Stadler, Georg Ghattas, Omar Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017 |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Mass loss from the Greenland and Antarctic ice sheets is accelerating. Although ice sheet models have improved in recent years, much work is needed to make these models robust and efficient on continental scales and to quantify uncertainties in their projected outputs. The University of Texas at Austin's role in the PISCEES project is to provide guidance on how best to apply uncertainty quantification strategies to evaluating uncertainties in simulations of Greenland and Antarctic contributions to sea level rise in response to environmental forcing. Here we report on several activities that involved project members at UTA including Section 2.1 where we provide a broader overview of challenges to use UQ methods on ice ow modeling. Within Section 2.2 we describe the progress and challenges that remain for implementing important aspects of our "end-to-end" UQ work flow. In sum, we had a break-through in realizing the potential for implementing Active Subspace strategies making use of existing experiments exploring the sensitivity of the Greenland ice sheet flow to uncertain basal traction parameters. Section 2.3 presents progress that is being made to explore the effect of uncertainties in bed topography on stability of Thwaites basin, West Antarctica, using the BISICLES ice flow model. This effort is joint with Dan Martin at LBNL and a graduate student being co-mentored by Jackson. The results provide a compelling test case for the BISICLES ice flow model to address an important science question concerning the role of uncertain boundary conditions on ice sheet contributions to sea level rise. |
author |
Jackson, Charles Stadler, Georg Ghattas, Omar |
author_facet |
Jackson, Charles Stadler, Georg Ghattas, Omar |
author_sort |
Jackson, Charles |
title |
Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017 |
title_short |
Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017 |
title_full |
Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017 |
title_fullStr |
Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017 |
title_full_unstemmed |
Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES) Final Technical Report for effort at the University of Texas at Austin Award DE-SC0008083 March 2016 - August 2017 |
title_sort |
predicting ice sheet and climate evolution at extreme scales (piscees) final technical report for effort at the university of texas at austin award de-sc0008083 march 2016 - august 2017 |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1464958 https://www.osti.gov/biblio/1464958 https://doi.org/10.2172/1464958 |
geographic |
Antarctic Austin Greenland West Antarctica |
geographic_facet |
Antarctic Austin Greenland West Antarctica |
genre |
Antarc* Antarctic Antarctica Greenland Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Greenland Ice Sheet West Antarctica |
op_relation |
http://www.osti.gov/servlets/purl/1464958 https://www.osti.gov/biblio/1464958 https://doi.org/10.2172/1464958 doi:10.2172/1464958 |
op_doi |
https://doi.org/10.2172/1464958 |
_version_ |
1772809899764350976 |