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Abstract:

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.

Registro:

Documento: Artículo
Título:The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere
Autor:Menéndez, C.G.; Serafini, V.; Le Treut, H.
Filiación:Ctro. Invest. Mar y la Atmosfera, CONICET-UBA Ciudad Universitaria, Pabellón 2, 1428 Buenos Aires, Argentina
Lab. de Meteorol. Dynamique/CNRS, Université P. et M. Curie, Tour 15-25, 4 place Jussieu, 75252 Paris Cedex 05, France
Palabras clave:climate modeling; eddy; sea ice
Año:1999
Volumen:15
Número:9
Página de inicio:659
Página de fin:671
DOI: http://dx.doi.org/10.1007/s003820050308
Título revista:Climate Dynamics
Título revista abreviado:Clim. Dyn.
ISSN:09307575
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v15_n9_p659_Menendez

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Citas:

---------- APA ----------
Menéndez, C.G., Serafini, V. & Le Treut, H. (1999) . The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere. Climate Dynamics, 15(9), 659-671.
http://dx.doi.org/10.1007/s003820050308
---------- CHICAGO ----------
Menéndez, C.G., Serafini, V., Le Treut, H. "The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere" . Climate Dynamics 15, no. 9 (1999) : 659-671.
http://dx.doi.org/10.1007/s003820050308
---------- MLA ----------
Menéndez, C.G., Serafini, V., Le Treut, H. "The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere" . Climate Dynamics, vol. 15, no. 9, 1999, pp. 659-671.
http://dx.doi.org/10.1007/s003820050308
---------- VANCOUVER ----------
Menéndez, C.G., Serafini, V., Le Treut, H. The effect of sea-ice on the transient atmospheric eddies of the Southern Hemisphere. Clim. Dyn. 1999;15(9):659-671.
http://dx.doi.org/10.1007/s003820050308