The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves
Oceanic melting at the base of the floating Antarctic ice shelves is now thought to be a more significant cause of mass loss for the Antarctic ice sheet than iceberg calving. In this study, a 10-km horizontal-resolution circum-Antarctic ocean–sea ice–ice shelf model [based on the Regional Ocean Mode...
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ftolddominionuni:oai:digitalcommons.odu.edu:ccpo_pubs-1172 2023-05-15T13:38:02+02:00 The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves Dinniman, Michael S. Klinck, John M. Bai, Le-Sheng Bromwich, David H. Hines, Keith M. Holland, David M. 2015-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/ccpo_pubs/158 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1172&context=ccpo_pubs unknown ODU Digital Commons https://digitalcommons.odu.edu/ccpo_pubs/158 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1172&context=ccpo_pubs CCPO Publications Antarctica Continental shelf Continental slope Ice shelves Southern Ocean Atmosphere-ocean interaction Ocean models Oceanography and Atmospheric Sciences and Meteorology article 2015 ftolddominionuni 2021-03-02T18:09:16Z Oceanic melting at the base of the floating Antarctic ice shelves is now thought to be a more significant cause of mass loss for the Antarctic ice sheet than iceberg calving. In this study, a 10-km horizontal-resolution circum-Antarctic ocean–sea ice–ice shelf model [based on the Regional Ocean Modeling System (ROMS)] is used to study the delivery of ocean heat to the base of the ice shelves. The atmospheric forcing comes from the ERA-Interim reanalysis (;80-km resolution) and from simulations using the polar-optimized Weather Re- search and Forecasting Model (30-km resolution), where the upper atmosphere was relaxed to the ERA- Interim reanalysis. The modeled total basal ice shelf melt is low compared to observational estimates but increases by 14% with the higher-resolution winds and just 3% with both the higher-resolution winds and atmospheric surface temperatures. The higher-resolution winds lead to more heat being delivered to the ice shelf cavities from the adjacent ocean and an increase in the efficiency of heat transfer between the water and the ice. The higher-resolution winds also lead to changes in the heat delivered from the open ocean to the continental shelves as well as changes in the heat lost to the atmosphere over the shelves, and the sign of these changes varies regionally. Addition of the higher-resolution temperatures to the winds results in lowering, primarily during summer, the wind-driven increase in heat advected into the ice shelf cavities due to colder summer air temperatures near the coast. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Antarctica Ice Sheet Ice Shelf Ice Shelves Iceberg* Sea ice Southern Ocean Old Dominion University: ODU Digital Commons Antarctic Antarctic Ocean Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Antarctica Continental shelf Continental slope Ice shelves Southern Ocean Atmosphere-ocean interaction Ocean models Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Antarctica Continental shelf Continental slope Ice shelves Southern Ocean Atmosphere-ocean interaction Ocean models Oceanography and Atmospheric Sciences and Meteorology Dinniman, Michael S. Klinck, John M. Bai, Le-Sheng Bromwich, David H. Hines, Keith M. Holland, David M. The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves |
topic_facet |
Antarctica Continental shelf Continental slope Ice shelves Southern Ocean Atmosphere-ocean interaction Ocean models Oceanography and Atmospheric Sciences and Meteorology |
description |
Oceanic melting at the base of the floating Antarctic ice shelves is now thought to be a more significant cause of mass loss for the Antarctic ice sheet than iceberg calving. In this study, a 10-km horizontal-resolution circum-Antarctic ocean–sea ice–ice shelf model [based on the Regional Ocean Modeling System (ROMS)] is used to study the delivery of ocean heat to the base of the ice shelves. The atmospheric forcing comes from the ERA-Interim reanalysis (;80-km resolution) and from simulations using the polar-optimized Weather Re- search and Forecasting Model (30-km resolution), where the upper atmosphere was relaxed to the ERA- Interim reanalysis. The modeled total basal ice shelf melt is low compared to observational estimates but increases by 14% with the higher-resolution winds and just 3% with both the higher-resolution winds and atmospheric surface temperatures. The higher-resolution winds lead to more heat being delivered to the ice shelf cavities from the adjacent ocean and an increase in the efficiency of heat transfer between the water and the ice. The higher-resolution winds also lead to changes in the heat delivered from the open ocean to the continental shelves as well as changes in the heat lost to the atmosphere over the shelves, and the sign of these changes varies regionally. Addition of the higher-resolution temperatures to the winds results in lowering, primarily during summer, the wind-driven increase in heat advected into the ice shelf cavities due to colder summer air temperatures near the coast. |
format |
Article in Journal/Newspaper |
author |
Dinniman, Michael S. Klinck, John M. Bai, Le-Sheng Bromwich, David H. Hines, Keith M. Holland, David M. |
author_facet |
Dinniman, Michael S. Klinck, John M. Bai, Le-Sheng Bromwich, David H. Hines, Keith M. Holland, David M. |
author_sort |
Dinniman, Michael S. |
title |
The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves |
title_short |
The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves |
title_full |
The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves |
title_fullStr |
The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves |
title_full_unstemmed |
The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves |
title_sort |
effect of atmospheric forcing resolution on delivery of ocean heat to the antarctic floating ice shelves |
publisher |
ODU Digital Commons |
publishDate |
2015 |
url |
https://digitalcommons.odu.edu/ccpo_pubs/158 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1172&context=ccpo_pubs |
geographic |
Antarctic Antarctic Ocean Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica Ice Sheet Ice Shelf Ice Shelves Iceberg* Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica Ice Sheet Ice Shelf Ice Shelves Iceberg* Sea ice Southern Ocean |
op_source |
CCPO Publications |
op_relation |
https://digitalcommons.odu.edu/ccpo_pubs/158 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1172&context=ccpo_pubs |
_version_ |
1766100860907028480 |