The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting
The processes responsible for freshwater flux from the Antarctic Ice Sheet (AIS) - ice-shelf basal melting and iceberg calving - are generally poorly represented in current Earth System Models (ESMs). Here we document the cryosphere configuration of the U.S. Department of Energy's Energy Exasca...
Published in: | Journal of Advances in Modeling Earth Systems |
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Online Access: | http://www.osti.gov/servlets/purl/1862807 https://www.osti.gov/biblio/1862807 https://doi.org/10.1029/2021ms002468 |
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ftosti:oai:osti.gov:1862807 2023-07-30T03:58:05+02:00 The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting Comeau, Darin Asay‐Davis, Xylar S. Begeman, Carolyn Branecky Hoffman, Matthew J. Lin, Wuyin Petersen, Mark R. Price, Stephen F. Roberts, Andrew F. Van Roekel, Luke P. Veneziani, Milena Wolfe, Jonathan D. Fyke, Jeremy G. Ringler, Todd D. Turner, Adrian K. 2022-04-29 application/pdf http://www.osti.gov/servlets/purl/1862807 https://www.osti.gov/biblio/1862807 https://doi.org/10.1029/2021ms002468 unknown http://www.osti.gov/servlets/purl/1862807 https://www.osti.gov/biblio/1862807 https://doi.org/10.1029/2021ms002468 doi:10.1029/2021ms002468 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1029/2021ms002468 2023-07-11T10:11:44Z The processes responsible for freshwater flux from the Antarctic Ice Sheet (AIS) - ice-shelf basal melting and iceberg calving - are generally poorly represented in current Earth System Models (ESMs). Here we document the cryosphere configuration of the U.S. Department of Energy's Energy Exascale Earth System Model (E3SM) v1.2. This includes simulating Antarctic ice-shelf basal melting, which has been implemented through simulating the ocean circulation within static Antarctic ice-shelf cavities, allowing for the ability to calculate ice- shelf basal melt rates from the associated heat and freshwater fluxes. In addition, we added the capability to prescribe forcing from iceberg melt, allowing for realistic representation of the other dominant mass loss process from the AIS. In standard resolution simulations (using a non-eddying ocean) under pre-industrial climate forcing, we find high sensitivity of modeled ocean/ice shelf interactions to the ocean state, which can result in a transition to a high basal melt regime under the Filchner-Ronne Ice Shelf (FRIS), presenting a significant challenge to representing the ocean/ice shelf system in a coupled ESM. We show that inclusion of a spatially dependent parameterization of eddy-induced transport reduces biases in water mass properties on the Antarctic continental shelf. With these improvements, E3SM produces realistic ice-shelf basal melt rates across the continent that are generally within the range inferred from observations. The accurate representation of ice-shelf basal melting within a coupled ESM is an important step towards reducing uncertainties in projections of the Antarctic response to climate change and Antarctica's contribution to global sea-level rise. Other/Unknown Material Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Iceberg* Ronne Ice Shelf SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) The Antarctic Journal of Advances in Modeling Earth Systems 14 2 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Comeau, Darin Asay‐Davis, Xylar S. Begeman, Carolyn Branecky Hoffman, Matthew J. Lin, Wuyin Petersen, Mark R. Price, Stephen F. Roberts, Andrew F. Van Roekel, Luke P. Veneziani, Milena Wolfe, Jonathan D. Fyke, Jeremy G. Ringler, Todd D. Turner, Adrian K. The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
The processes responsible for freshwater flux from the Antarctic Ice Sheet (AIS) - ice-shelf basal melting and iceberg calving - are generally poorly represented in current Earth System Models (ESMs). Here we document the cryosphere configuration of the U.S. Department of Energy's Energy Exascale Earth System Model (E3SM) v1.2. This includes simulating Antarctic ice-shelf basal melting, which has been implemented through simulating the ocean circulation within static Antarctic ice-shelf cavities, allowing for the ability to calculate ice- shelf basal melt rates from the associated heat and freshwater fluxes. In addition, we added the capability to prescribe forcing from iceberg melt, allowing for realistic representation of the other dominant mass loss process from the AIS. In standard resolution simulations (using a non-eddying ocean) under pre-industrial climate forcing, we find high sensitivity of modeled ocean/ice shelf interactions to the ocean state, which can result in a transition to a high basal melt regime under the Filchner-Ronne Ice Shelf (FRIS), presenting a significant challenge to representing the ocean/ice shelf system in a coupled ESM. We show that inclusion of a spatially dependent parameterization of eddy-induced transport reduces biases in water mass properties on the Antarctic continental shelf. With these improvements, E3SM produces realistic ice-shelf basal melt rates across the continent that are generally within the range inferred from observations. The accurate representation of ice-shelf basal melting within a coupled ESM is an important step towards reducing uncertainties in projections of the Antarctic response to climate change and Antarctica's contribution to global sea-level rise. |
author |
Comeau, Darin Asay‐Davis, Xylar S. Begeman, Carolyn Branecky Hoffman, Matthew J. Lin, Wuyin Petersen, Mark R. Price, Stephen F. Roberts, Andrew F. Van Roekel, Luke P. Veneziani, Milena Wolfe, Jonathan D. Fyke, Jeremy G. Ringler, Todd D. Turner, Adrian K. |
author_facet |
Comeau, Darin Asay‐Davis, Xylar S. Begeman, Carolyn Branecky Hoffman, Matthew J. Lin, Wuyin Petersen, Mark R. Price, Stephen F. Roberts, Andrew F. Van Roekel, Luke P. Veneziani, Milena Wolfe, Jonathan D. Fyke, Jeremy G. Ringler, Todd D. Turner, Adrian K. |
author_sort |
Comeau, Darin |
title |
The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting |
title_short |
The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting |
title_full |
The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting |
title_fullStr |
The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting |
title_full_unstemmed |
The DOE E3SM v1.2 Cryosphere Configuration: Description and Simulated Antarctic Ice-Shelf Basal Melting |
title_sort |
doe e3sm v1.2 cryosphere configuration: description and simulated antarctic ice-shelf basal melting |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1862807 https://www.osti.gov/biblio/1862807 https://doi.org/10.1029/2021ms002468 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Ronne Ice Shelf The Antarctic |
geographic_facet |
Antarctic Ronne Ice Shelf The Antarctic |
genre |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Iceberg* Ronne Ice Shelf |
genre_facet |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Iceberg* Ronne Ice Shelf |
op_relation |
http://www.osti.gov/servlets/purl/1862807 https://www.osti.gov/biblio/1862807 https://doi.org/10.1029/2021ms002468 doi:10.1029/2021ms002468 |
op_doi |
https://doi.org/10.1029/2021ms002468 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
14 |
container_issue |
2 |
_version_ |
1772820994600206336 |