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, A.L., Silvestri, G., Compagnucci, R.
Formato: JOUR
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: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 todo:paper_08948755_v25_n19_p6781_Berman
record_format dspace
spelling todo:paper_08948755_v25_n19_p6781_Berman2023-10-03T15:42:14Z Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation Berman, A.L. Silvestri, G. Compagnucci, R. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, A.L.
Silvestri, G.
Compagnucci, R.
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.
format JOUR
author Berman, A.L.
Silvestri, G.
Compagnucci, R.
author_facet Berman, A.L.
Silvestri, G.
Compagnucci, R.
author_sort Berman, A.L.
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
url http://hdl.handle.net/20.500.12110/paper_08948755_v25_n19_p6781_Berman
work_keys_str_mv AT bermanal easternpatagoniaseasonalprecipitationinfluenceofsouthernhemispherecirculationandlinkswithsubtropicalsouthamericanprecipitation
AT silvestrig easternpatagoniaseasonalprecipitationinfluenceofsouthernhemispherecirculationandlinkswithsubtropicalsouthamericanprecipitation
AT compagnuccir easternpatagoniaseasonalprecipitationinfluenceofsouthernhemispherecirculationandlinkswithsubtropicalsouthamericanprecipitation
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