Modelling sea ice formation in the Terra Nova Bay polynya
Antarctic sea ice is constantly exported from the shore by strong near surface winds that open leads and large polynyas in the pack ice. The latter, known as wind-driven polynyas, are responsible for significant water mass modification due to the high salt flux into the ocean associated with enhance...
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Online Access: | http://hdl.handle.net/11566/265365 https://doi.org/10.1016/j.jmarsys.2016.06.013 |
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ftupmarcheiris:oai:iris.univpm.it:11566/265365 2024-04-14T08:01:15+00:00 Modelling sea ice formation in the Terra Nova Bay polynya Sansiviero, M. Morales Maqueda, M. Ã. Fusco, G. Aulicino, G. Flocco, D. Budillon, G. Sansiviero, M. Morales Maqueda, M. Ã . Fusco, G. Aulicino, G. Flocco, D. Budillon, G. 2017 http://hdl.handle.net/11566/265365 https://doi.org/10.1016/j.jmarsys.2016.06.013 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000391074300002 volume:166 firstpage:4 lastpage:25 numberofpages:22 journal:JOURNAL OF MARINE SYSTEMS http://hdl.handle.net/11566/265365 doi:10.1016/j.jmarsys.2016.06.013 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85006324730 www.elsevier.com/inca/publications/store/5/0/3/3/4/4 Coupled model Katabatic wind Polynya Sea ice Oceanography Ecology Evolution Behavior and Systematic Aquatic Science info:eu-repo/semantics/article 2017 ftupmarcheiris https://doi.org/10.1016/j.jmarsys.2016.06.013 2024-03-21T18:21:43Z Antarctic sea ice is constantly exported from the shore by strong near surface winds that open leads and large polynyas in the pack ice. The latter, known as wind-driven polynyas, are responsible for significant water mass modification due to the high salt flux into the ocean associated with enhanced ice growth. In this article, we focus on the wind-driven Terra Nova Bay (TNB) polynya, in the western Ross Sea. Brine rejected during sea ice formation processes that occur in the TNB polynya densifies the water column leading to the formation of the most characteristic water mass of the Ross Sea, the High Salinity Shelf Water (HSSW). This water mass, in turn, takes part in the formation of Antarctic Bottom Water (AABW), the densest water mass of the world ocean, which plays a major role in the global meridional overturning circulation, thus affecting the global climate system. A simple coupled sea ice–ocean model has been developed to simulate the seasonal cycle of sea ice formation and exportwithin a polynya. The sea icemodel accounts for both thermal andmechanical ice processes. The oceanic circulation is described by a one-and-a-half layer, reduced gravity model. The domain resolution is 1 km× 1 km, which is sufficient to represent the salient features of the coastline geometry, notably the Drygalski Ice Tongue. The model is forced by a combination of Era Interim reanalysis and in-situ data from automatic weather stations, and also by a climatological oceanic dataset developed fromin situ hydrographic observations. The sensitivity of the polynya to the atmospheric forcing is well reproduced by the model when atmospheric in situ measurements are combined with reanalysis data. Merging the two datasets allows us to capture in detail the strength and the spatial distribution of the katabatic winds that often drive the opening of the polynya. The model resolves fairly accurately the sea ice drift and sea ice production rates in the TNB polynya, leading to realistic polynya extent estimates. The model-derived polynya ... Article in Journal/Newspaper Antarc* Antarctic Ross Sea Sea ice Università Politecnica delle Marche: IRIS Antarctic Ross Sea Terra Nova Bay Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) Journal of Marine Systems 166 4 25 |
institution |
Open Polar |
collection |
Università Politecnica delle Marche: IRIS |
op_collection_id |
ftupmarcheiris |
language |
English |
topic |
Coupled model Katabatic wind Polynya Sea ice Oceanography Ecology Evolution Behavior and Systematic Aquatic Science |
spellingShingle |
Coupled model Katabatic wind Polynya Sea ice Oceanography Ecology Evolution Behavior and Systematic Aquatic Science Sansiviero, M. Morales Maqueda, M. Ã. Fusco, G. Aulicino, G. Flocco, D. Budillon, G. Modelling sea ice formation in the Terra Nova Bay polynya |
topic_facet |
Coupled model Katabatic wind Polynya Sea ice Oceanography Ecology Evolution Behavior and Systematic Aquatic Science |
description |
Antarctic sea ice is constantly exported from the shore by strong near surface winds that open leads and large polynyas in the pack ice. The latter, known as wind-driven polynyas, are responsible for significant water mass modification due to the high salt flux into the ocean associated with enhanced ice growth. In this article, we focus on the wind-driven Terra Nova Bay (TNB) polynya, in the western Ross Sea. Brine rejected during sea ice formation processes that occur in the TNB polynya densifies the water column leading to the formation of the most characteristic water mass of the Ross Sea, the High Salinity Shelf Water (HSSW). This water mass, in turn, takes part in the formation of Antarctic Bottom Water (AABW), the densest water mass of the world ocean, which plays a major role in the global meridional overturning circulation, thus affecting the global climate system. A simple coupled sea ice–ocean model has been developed to simulate the seasonal cycle of sea ice formation and exportwithin a polynya. The sea icemodel accounts for both thermal andmechanical ice processes. The oceanic circulation is described by a one-and-a-half layer, reduced gravity model. The domain resolution is 1 km× 1 km, which is sufficient to represent the salient features of the coastline geometry, notably the Drygalski Ice Tongue. The model is forced by a combination of Era Interim reanalysis and in-situ data from automatic weather stations, and also by a climatological oceanic dataset developed fromin situ hydrographic observations. The sensitivity of the polynya to the atmospheric forcing is well reproduced by the model when atmospheric in situ measurements are combined with reanalysis data. Merging the two datasets allows us to capture in detail the strength and the spatial distribution of the katabatic winds that often drive the opening of the polynya. The model resolves fairly accurately the sea ice drift and sea ice production rates in the TNB polynya, leading to realistic polynya extent estimates. The model-derived polynya ... |
author2 |
Sansiviero, M. Morales Maqueda, M. Ã . Fusco, G. Aulicino, G. Flocco, D. Budillon, G. |
format |
Article in Journal/Newspaper |
author |
Sansiviero, M. Morales Maqueda, M. Ã. Fusco, G. Aulicino, G. Flocco, D. Budillon, G. |
author_facet |
Sansiviero, M. Morales Maqueda, M. Ã. Fusco, G. Aulicino, G. Flocco, D. Budillon, G. |
author_sort |
Sansiviero, M. |
title |
Modelling sea ice formation in the Terra Nova Bay polynya |
title_short |
Modelling sea ice formation in the Terra Nova Bay polynya |
title_full |
Modelling sea ice formation in the Terra Nova Bay polynya |
title_fullStr |
Modelling sea ice formation in the Terra Nova Bay polynya |
title_full_unstemmed |
Modelling sea ice formation in the Terra Nova Bay polynya |
title_sort |
modelling sea ice formation in the terra nova bay polynya |
publishDate |
2017 |
url |
http://hdl.handle.net/11566/265365 https://doi.org/10.1016/j.jmarsys.2016.06.013 |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) |
geographic |
Antarctic Ross Sea Terra Nova Bay Drygalski Drygalski Ice Tongue |
geographic_facet |
Antarctic Ross Sea Terra Nova Bay Drygalski Drygalski Ice Tongue |
genre |
Antarc* Antarctic Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000391074300002 volume:166 firstpage:4 lastpage:25 numberofpages:22 journal:JOURNAL OF MARINE SYSTEMS http://hdl.handle.net/11566/265365 doi:10.1016/j.jmarsys.2016.06.013 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85006324730 www.elsevier.com/inca/publications/store/5/0/3/3/4/4 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2016.06.013 |
container_title |
Journal of Marine Systems |
container_volume |
166 |
container_start_page |
4 |
op_container_end_page |
25 |
_version_ |
1796308082248122368 |