New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice
The Ross Ice Shelf (RIS) floats over the southern sector of the Ross Sea creating beneath a crucial area for ocean-ice interactions, known as the cavity. This area is characterized by the formation of Ice Shelf Water (ISW) as well as the intrusion of warm water, which is the main driver of basal mel...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5018411 2023-09-05T13:13:39+02:00 New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice Falco, P. Krauzig, N. Martellucci, R. Pirro, A. Castagno, P. Menna, M. Cotroneo, Y. Pacciaroni, M. Garzia, A. Memmola, F. Notarstefano, G. Mauri, E. Budillon, G. Zambianchi, E. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018411 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-2346 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018411 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-2346 2023-08-13T23:41:23Z The Ross Ice Shelf (RIS) floats over the southern sector of the Ross Sea creating beneath a crucial area for ocean-ice interactions, known as the cavity. This area is characterized by the formation of Ice Shelf Water (ISW) as well as the intrusion of warm water, which is the main driver of basal melting and ice shelf calving. Ocean-driven basal melting and calving are the predominant causes of ice-shelf buttressing losses and the ice discharge that directly affects the global sea level. While the RIS is not considered to be under threat from the on-shelf intrusion of warm Circumpolar Deep Water (CDW), dense High Salinity Shelf Water (HSSW) and seasonally warmed Antarctic Surface Water (AASW) are expected to cause significant basal melting. The RIS northwest sector, which is directly exposed to solar-heated AASW, sees melt rates that nearly triple during the summer months. In this work, we present unprecedented thermohaline observations from Argo floats close to the north-western sector of the RIS during 2020-2022. Data from the floats provide insights into the year-around water mass structure along and even under the RIS. The continuous under-ice profiles made it possible to observe the complete cycle of water column change during seasonal transitions, the formation of HSSW in the RIS polynya as well as the outflow of ISW. Moreover, one Argo float spent 6 months under the RIS, collecting data directly at the sea-ice interface and capturing the intrusion of warm surface waters into the shelf cavity during the summer. Conference Object Antarc* Antarctic Ice Shelf Ross Ice Shelf Ross Sea Sea ice GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic Ross Ice Shelf Ross Sea |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
The Ross Ice Shelf (RIS) floats over the southern sector of the Ross Sea creating beneath a crucial area for ocean-ice interactions, known as the cavity. This area is characterized by the formation of Ice Shelf Water (ISW) as well as the intrusion of warm water, which is the main driver of basal melting and ice shelf calving. Ocean-driven basal melting and calving are the predominant causes of ice-shelf buttressing losses and the ice discharge that directly affects the global sea level. While the RIS is not considered to be under threat from the on-shelf intrusion of warm Circumpolar Deep Water (CDW), dense High Salinity Shelf Water (HSSW) and seasonally warmed Antarctic Surface Water (AASW) are expected to cause significant basal melting. The RIS northwest sector, which is directly exposed to solar-heated AASW, sees melt rates that nearly triple during the summer months. In this work, we present unprecedented thermohaline observations from Argo floats close to the north-western sector of the RIS during 2020-2022. Data from the floats provide insights into the year-around water mass structure along and even under the RIS. The continuous under-ice profiles made it possible to observe the complete cycle of water column change during seasonal transitions, the formation of HSSW in the RIS polynya as well as the outflow of ISW. Moreover, one Argo float spent 6 months under the RIS, collecting data directly at the sea-ice interface and capturing the intrusion of warm surface waters into the shelf cavity during the summer. |
format |
Conference Object |
author |
Falco, P. Krauzig, N. Martellucci, R. Pirro, A. Castagno, P. Menna, M. Cotroneo, Y. Pacciaroni, M. Garzia, A. Memmola, F. Notarstefano, G. Mauri, E. Budillon, G. Zambianchi, E. |
spellingShingle |
Falco, P. Krauzig, N. Martellucci, R. Pirro, A. Castagno, P. Menna, M. Cotroneo, Y. Pacciaroni, M. Garzia, A. Memmola, F. Notarstefano, G. Mauri, E. Budillon, G. Zambianchi, E. New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice |
author_facet |
Falco, P. Krauzig, N. Martellucci, R. Pirro, A. Castagno, P. Menna, M. Cotroneo, Y. Pacciaroni, M. Garzia, A. Memmola, F. Notarstefano, G. Mauri, E. Budillon, G. Zambianchi, E. |
author_sort |
Falco, P. |
title |
New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice |
title_short |
New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice |
title_full |
New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice |
title_fullStr |
New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice |
title_full_unstemmed |
New insights into winter-time dynamics of the Ross Sea: an analysis of grounded Argo floats under ice |
title_sort |
new insights into winter-time dynamics of the ross sea: an analysis of grounded argo floats under ice |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018411 |
geographic |
Antarctic Ross Ice Shelf Ross Sea |
geographic_facet |
Antarctic Ross Ice Shelf Ross Sea |
genre |
Antarc* Antarctic Ice Shelf Ross Ice Shelf Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Ice Shelf Ross Ice Shelf Ross Sea Sea ice |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-2346 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018411 |
op_doi |
https://doi.org/10.57757/IUGG23-2346 |
_version_ |
1776204849965170688 |