Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation

Some aspects of the seasonal precipitation over eastern Patagonia, the southernmost area of South America east of the Andes Cordillera, are examined in this paper. Results indicate that the central-north areas, the southern continental region, and the southernmost islands are three independent regio...

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Autores principales:	Berman, Ana Laura, Silvestri, Gabriel Emilio, Compagnucci, Rosa Hilda
Publicado:	2012
Materias:	Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Climate change Meteorology Tropics annual variation atmospheric circulation climate variation precipitation (climatology) seasonal variation subtropical region teleconnection Patagonia
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948755_v25_n19_p6781_Berman http://hdl.handle.net/20.500.12110/paper_08948755_v25_n19_p6781_Berman
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08948755_v25_n19_p6781_Berman
record_format	dspace
spelling	paper:paper_08948755_v25_n19_p6781_Berman2023-06-08T15:47:55Z Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation Berman, Ana Laura Silvestri, Gabriel Emilio Compagnucci, Rosa Hilda Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Climate change Meteorology Tropics annual variation atmospheric circulation climate variation precipitation (climatology) seasonal variation Southern Hemisphere subtropical region teleconnection Patagonia Some aspects of the seasonal precipitation over eastern Patagonia, the southernmost area of South America east of the Andes Cordillera, are examined in this paper. Results indicate that the central-north areas, the southern continental region, and the southernmost islands are three independent regions of seasonal precipitation, and that each of them is associated with specific patterns of atmospheric circulation. Precipitation over the central-north region is significantly related to the precipitation over a wide area of southern South America east of the Andes during the four seasons. Enhanced (reduced) precipitation over this area is associated with weakened (intensified) westerly flow in the region. Precipitation over the southern continental area has a close connection with the dipolar pattern of precipitation over subtropical South America during spring, summer, and autumn. The anomalies of atmospheric circulation at low and upper levels associated with the subtropical dipole are also able to modulate the intensity of the westerlies over the south of eastern Patagonia, affecting the regional precipitation. Precipitation over the islands of the southernmost part of eastern Patagonia is connected with subtropical precipitation in summer and winter. The activity of frontal systems associated with migratory perturbations moving to the east along the Southern Hemisphere storm tracks modulates the variability of seasonal precipitation over this region. © 2012 American Meteorological Society. Fil:Berman, A.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Silvestri, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Compagnucci, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948755_v25_n19_p6781_Berman http://hdl.handle.net/20.500.12110/paper_08948755_v25_n19_p6781_Berman
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Climate change Meteorology Tropics annual variation atmospheric circulation climate variation precipitation (climatology) seasonal variation Southern Hemisphere subtropical region teleconnection Patagonia
spellingShingle	Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Climate change Meteorology Tropics annual variation atmospheric circulation climate variation precipitation (climatology) seasonal variation Southern Hemisphere subtropical region teleconnection Patagonia Berman, Ana Laura Silvestri, Gabriel Emilio Compagnucci, Rosa Hilda Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation
topic_facet	Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Atmospheric circulation Climate variability Interannual variability South America Southern Hemisphere Teleconnections Climate change Meteorology Tropics annual variation atmospheric circulation climate variation precipitation (climatology) seasonal variation Southern Hemisphere subtropical region teleconnection Patagonia
description	Some aspects of the seasonal precipitation over eastern Patagonia, the southernmost area of South America east of the Andes Cordillera, are examined in this paper. Results indicate that the central-north areas, the southern continental region, and the southernmost islands are three independent regions of seasonal precipitation, and that each of them is associated with specific patterns of atmospheric circulation. Precipitation over the central-north region is significantly related to the precipitation over a wide area of southern South America east of the Andes during the four seasons. Enhanced (reduced) precipitation over this area is associated with weakened (intensified) westerly flow in the region. Precipitation over the southern continental area has a close connection with the dipolar pattern of precipitation over subtropical South America during spring, summer, and autumn. The anomalies of atmospheric circulation at low and upper levels associated with the subtropical dipole are also able to modulate the intensity of the westerlies over the south of eastern Patagonia, affecting the regional precipitation. Precipitation over the islands of the southernmost part of eastern Patagonia is connected with subtropical precipitation in summer and winter. The activity of frontal systems associated with migratory perturbations moving to the east along the Southern Hemisphere storm tracks modulates the variability of seasonal precipitation over this region. © 2012 American Meteorological Society.
author	Berman, Ana Laura Silvestri, Gabriel Emilio Compagnucci, Rosa Hilda
author_facet	Berman, Ana Laura Silvestri, Gabriel Emilio Compagnucci, Rosa Hilda
author_sort	Berman, Ana Laura
title	Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation
title_short	Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation
title_full	Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation
title_fullStr	Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation
title_full_unstemmed	Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation
title_sort	eastern patagonia seasonal precipitation: influence of southern hemisphere circulation and links with subtropical south american precipitation
publishDate	2012
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948755_v25_n19_p6781_Berman http://hdl.handle.net/20.500.12110/paper_08948755_v25_n19_p6781_Berman
work_keys_str_mv	AT bermananalaura easternpatagoniaseasonalprecipitationinfluenceofsouthernhemispherecirculationandlinkswithsubtropicalsouthamericanprecipitation AT silvestrigabrielemilio easternpatagoniaseasonalprecipitationinfluenceofsouthernhemispherecirculationandlinkswithsubtropicalsouthamericanprecipitation AT compagnuccirosahilda easternpatagoniaseasonalprecipitationinfluenceofsouthernhemispherecirculationandlinkswithsubtropicalsouthamericanprecipitation
_version_	1768545743411347456

Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation

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