The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere

Two 10 y simulations with a full seasonal cycle and 96 x 72 x 19 resolution were carried out with a version of the LMD GCM to diagnose the role of sea-ice on the extratropical climatology of the Southern Hemisphere. The control integration used the usual observed sea-ice distribution, while the anom...

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Bibliographic Details
Main Authors: Menéndez, C.G., Serafini, V., Le Treut, H.
Format: Journal/Newspaper
Language:unknown
Subjects:
Online Access:https://hdl.handle.net/20.500.12110/paper_09307575_v15_n9_p659_Menendez
id ftunibueairesbd:todo:paper_09307575_v15_n9_p659_Menendez
record_format openpolar
spelling ftunibueairesbd:todo:paper_09307575_v15_n9_p659_Menendez 2023-10-29T02:39:57+01:00 The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere Menéndez, C.G. Serafini, V. Le Treut, H. https://hdl.handle.net/20.500.12110/paper_09307575_v15_n9_p659_Menendez unknown http://hdl.handle.net/20.500.12110/paper_09307575_v15_n9_p659_Menendez info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar climate modeling eddy sea ice JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_09307575_v15_n9_p659_Menendez 2023-10-05T01:13:38Z Two 10 y simulations with a full seasonal cycle and 96 x 72 x 19 resolution were carried out with a version of the LMD GCM to diagnose the role of sea-ice on the extratropical climatology of the Southern Hemisphere. The control integration used the usual observed sea-ice distribution, while the anomaly simulation imposed a scenario in which all sea-ice was entirely replaced by open ocean. The simulated control climate was compared with available observational-based analyses. Relevant diagnostics of the time mean and indicators of the transient eddy activity have been evaluated for both integrations. The impact was shown throughout the troposphere and was larger and more organised in winter. We found reduced westerly flow and both falls and rises in sea level pressure in the region from which sea-ice was removed. The removal of ice in the Southern Ocean affects the baroclinic structure of the atmosphere. Changes in baroclinicity and eddy activity are consistent with changes in the mean climate. In general, the meridional wind variance, the poleward transient temperature flux and the eddy flux convergence of westerly momentum were weaker over the Southern Ocean. However, a strengthening of the variance downstream of the subtropical jet was found. The position of the main storm track tends to be slightly displaced equatorward in the anomaly case. Fil:Menéndez, C.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Journal/Newspaper Sea ice Southern Ocean Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
institution Open Polar
collection Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
op_collection_id ftunibueairesbd
language unknown
topic climate modeling
eddy
sea ice
spellingShingle climate modeling
eddy
sea ice
Menéndez, C.G.
Serafini, V.
Le Treut, H.
The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere
topic_facet climate modeling
eddy
sea ice
description Two 10 y simulations with a full seasonal cycle and 96 x 72 x 19 resolution were carried out with a version of the LMD GCM to diagnose the role of sea-ice on the extratropical climatology of the Southern Hemisphere. The control integration used the usual observed sea-ice distribution, while the anomaly simulation imposed a scenario in which all sea-ice was entirely replaced by open ocean. The simulated control climate was compared with available observational-based analyses. Relevant diagnostics of the time mean and indicators of the transient eddy activity have been evaluated for both integrations. The impact was shown throughout the troposphere and was larger and more organised in winter. We found reduced westerly flow and both falls and rises in sea level pressure in the region from which sea-ice was removed. The removal of ice in the Southern Ocean affects the baroclinic structure of the atmosphere. Changes in baroclinicity and eddy activity are consistent with changes in the mean climate. In general, the meridional wind variance, the poleward transient temperature flux and the eddy flux convergence of westerly momentum were weaker over the Southern Ocean. However, a strengthening of the variance downstream of the subtropical jet was found. The position of the main storm track tends to be slightly displaced equatorward in the anomaly case. Fil:Menéndez, C.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
format Journal/Newspaper
author Menéndez, C.G.
Serafini, V.
Le Treut, H.
author_facet Menéndez, C.G.
Serafini, V.
Le Treut, H.
author_sort Menéndez, C.G.
title The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere
title_short The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere
title_full The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere
title_fullStr The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere
title_full_unstemmed The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere
title_sort effect of sea-ice on the transient atmospheric eddies of the southern hemisphere
url https://hdl.handle.net/20.500.12110/paper_09307575_v15_n9_p659_Menendez
genre Sea ice
Southern Ocean
genre_facet Sea ice
Southern Ocean
op_relation http://hdl.handle.net/20.500.12110/paper_09307575_v15_n9_p659_Menendez
op_rights info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
op_doi https://doi.org/20.500.12110/paper_09307575_v15_n9_p659_Menendez
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