Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing
In recent decades, the Ross Ice Shelf (RIS) has experienced frequent summer surface melting, which accelerates ice loss and increases the instability of ice sheets. This study investigates the remote forcing and local air-ice interaction responsible for the surface melting process. The northerly win...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5017459 2023-06-11T04:07:14+02:00 Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing Hu, X. Li, W. Fang, Y. Yang, S. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017459 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-1138 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017459 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-1138 2023-05-28T23:39:14Z In recent decades, the Ross Ice Shelf (RIS) has experienced frequent summer surface melting, which accelerates ice loss and increases the instability of ice sheets. This study investigates the remote forcing and local air-ice interaction responsible for the surface melting process. The northerly wind anomaly over RIS is established as part of a quasi-geostrophic barotropic Rossby wave train from subtropical Australia toward West Antarctica.After the northern wind anomaly is established, the response of the surface energy budget to the warm and moist air intrusion is discussed. By applying Climate Feedback-Response Analysis Method (CFRAM), the temporal surge of the downward longwave (LW) surface radiative fluxes over the Ross Ice Shelf (RIS) and adjacent regions during four historically massive RIS surface melting events are decomposed to identify the main contributor. It is found that the intrusion of warm and humid air flows from lower latitudes conduces to warm air temperature and more water vapor anomalies, as well as cloud development. These changes make a cooperative impact on the abnormal enhancement of the downward LW surface radiative fluxes, contributing significantly the surface warming and causing massive ice melting. Conference Object Antarc* Ice Sheet Ice Shelf Ross Ice Shelf GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Ross Ice Shelf |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
In recent decades, the Ross Ice Shelf (RIS) has experienced frequent summer surface melting, which accelerates ice loss and increases the instability of ice sheets. This study investigates the remote forcing and local air-ice interaction responsible for the surface melting process. The northerly wind anomaly over RIS is established as part of a quasi-geostrophic barotropic Rossby wave train from subtropical Australia toward West Antarctica.After the northern wind anomaly is established, the response of the surface energy budget to the warm and moist air intrusion is discussed. By applying Climate Feedback-Response Analysis Method (CFRAM), the temporal surge of the downward longwave (LW) surface radiative fluxes over the Ross Ice Shelf (RIS) and adjacent regions during four historically massive RIS surface melting events are decomposed to identify the main contributor. It is found that the intrusion of warm and humid air flows from lower latitudes conduces to warm air temperature and more water vapor anomalies, as well as cloud development. These changes make a cooperative impact on the abnormal enhancement of the downward LW surface radiative fluxes, contributing significantly the surface warming and causing massive ice melting. |
format |
Conference Object |
author |
Hu, X. Li, W. Fang, Y. Yang, S. |
spellingShingle |
Hu, X. Li, W. Fang, Y. Yang, S. Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing |
author_facet |
Hu, X. Li, W. Fang, Y. Yang, S. |
author_sort |
Hu, X. |
title |
Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing |
title_short |
Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing |
title_full |
Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing |
title_fullStr |
Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing |
title_full_unstemmed |
Surface melting events over Ross Ice Sheet: From the local air-ice interaction to the remote forcing |
title_sort |
surface melting events over ross ice sheet: from the local air-ice interaction to the remote forcing |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017459 |
geographic |
Ross Ice Shelf |
geographic_facet |
Ross Ice Shelf |
genre |
Antarc* Ice Sheet Ice Shelf Ross Ice Shelf |
genre_facet |
Antarc* Ice Sheet Ice Shelf Ross Ice Shelf |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-1138 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017459 |
op_doi |
https://doi.org/10.57757/IUGG23-1138 |
_version_ |
1768380202540335104 |