On the variability of seasonal temperature in southern South America
The aim of this paper is to investigate different aspects of the seasonal-to-interannual temperature variability in Eastern Patagonia, the southernmost area of South America, east of the Andes Cordillera. Homogenous regions of seasonal variability and the atmospheric circulation patterns associated...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v40_n7-8_p1863_Berman http://hdl.handle.net/20.500.12110/paper_09307575_v40_n7-8_p1863_Berman |
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paper:paper_09307575_v40_n7-8_p1863_Berman2023-06-08T15:52:42Z On the variability of seasonal temperature in southern South America Berman, Ana Laura Silvestri, Gabriel Emilio Compagnucci, Rosa Hilda Interannual variability Pacific-South American modes Patagonia region South American temperature Southern Annular Mode advection air temperature annual variation anticyclone atmospheric circulation seasonal variation solar radiation westerly Andes Argentina Brazil Paraguay Patagonia The aim of this paper is to investigate different aspects of the seasonal-to-interannual temperature variability in Eastern Patagonia, the southernmost area of South America, east of the Andes Cordillera. Homogenous regions of seasonal variability and the atmospheric circulation patterns associated with warm and cold conditions in each of them are described in this study. Relationships between temperature in Eastern Patagonia and that registered in other areas of southern South America are also addressed. Results show that the northern and southern areas of Eastern Patagonia have different temperature variability in summer and autumn whereas the temperature variability tends to be more homogeneous within the region during winter and spring. Warm (cold) conditions in the northern areas are associated with reinforced (weakened) westerlies in summer, winter and spring whereas northerly (southerly) advections of warm (cold) air toward the region produce such conditions in autumn. Temperature in the southern portion of Eastern Patagonia is affected by anticyclonic (cyclonic) anomalies that enhance (reduce) the incoming solar radiation and induce reinforced (weakened) westerlies promoting warm (cold) conditions in the region. Furthermore, cyclonic (anticyclonic) anomalies at subpolar latitudes hinder (favor) outbreaks of cold air increasing (decreasing) the temperature over areas of Eastern Patagonia. The circulation anomalies associated with warm (cold) conditions in Eastern Patagonia also promote cold (warm) conditions over areas of northern Argentina, Paraguay and southern Brazil. Consequently, a dipole of temperature is detected in southern South America with centers of opposite sign over these regions. © 2012 Springer-Verlag Berlin Heidelberg. 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. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v40_n7-8_p1863_Berman http://hdl.handle.net/20.500.12110/paper_09307575_v40_n7-8_p1863_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 |
Interannual variability Pacific-South American modes Patagonia region South American temperature Southern Annular Mode advection air temperature annual variation anticyclone atmospheric circulation seasonal variation solar radiation westerly Andes Argentina Brazil Paraguay Patagonia |
| spellingShingle |
Interannual variability Pacific-South American modes Patagonia region South American temperature Southern Annular Mode advection air temperature annual variation anticyclone atmospheric circulation seasonal variation solar radiation westerly Andes Argentina Brazil Paraguay Patagonia Berman, Ana Laura Silvestri, Gabriel Emilio Compagnucci, Rosa Hilda On the variability of seasonal temperature in southern South America |
| topic_facet |
Interannual variability Pacific-South American modes Patagonia region South American temperature Southern Annular Mode advection air temperature annual variation anticyclone atmospheric circulation seasonal variation solar radiation westerly Andes Argentina Brazil Paraguay Patagonia |
| description |
The aim of this paper is to investigate different aspects of the seasonal-to-interannual temperature variability in Eastern Patagonia, the southernmost area of South America, east of the Andes Cordillera. Homogenous regions of seasonal variability and the atmospheric circulation patterns associated with warm and cold conditions in each of them are described in this study. Relationships between temperature in Eastern Patagonia and that registered in other areas of southern South America are also addressed. Results show that the northern and southern areas of Eastern Patagonia have different temperature variability in summer and autumn whereas the temperature variability tends to be more homogeneous within the region during winter and spring. Warm (cold) conditions in the northern areas are associated with reinforced (weakened) westerlies in summer, winter and spring whereas northerly (southerly) advections of warm (cold) air toward the region produce such conditions in autumn. Temperature in the southern portion of Eastern Patagonia is affected by anticyclonic (cyclonic) anomalies that enhance (reduce) the incoming solar radiation and induce reinforced (weakened) westerlies promoting warm (cold) conditions in the region. Furthermore, cyclonic (anticyclonic) anomalies at subpolar latitudes hinder (favor) outbreaks of cold air increasing (decreasing) the temperature over areas of Eastern Patagonia. The circulation anomalies associated with warm (cold) conditions in Eastern Patagonia also promote cold (warm) conditions over areas of northern Argentina, Paraguay and southern Brazil. Consequently, a dipole of temperature is detected in southern South America with centers of opposite sign over these regions. © 2012 Springer-Verlag Berlin Heidelberg. |
| 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 |
On the variability of seasonal temperature in southern South America |
| title_short |
On the variability of seasonal temperature in southern South America |
| title_full |
On the variability of seasonal temperature in southern South America |
| title_fullStr |
On the variability of seasonal temperature in southern South America |
| title_full_unstemmed |
On the variability of seasonal temperature in southern South America |
| title_sort |
on the variability of seasonal temperature in southern south america |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v40_n7-8_p1863_Berman http://hdl.handle.net/20.500.12110/paper_09307575_v40_n7-8_p1863_Berman |
| work_keys_str_mv |
AT bermananalaura onthevariabilityofseasonaltemperatureinsouthernsouthamerica AT silvestrigabrielemilio onthevariabilityofseasonaltemperatureinsouthernsouthamerica AT compagnuccirosahilda onthevariabilityofseasonaltemperatureinsouthernsouthamerica |
| _version_ |
1768542603889868800 |