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Abstract:

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.

Registro:

Documento: Artículo
Título:On the variability of seasonal temperature in southern South America
Autor:Berman, A.L.; Silvestri, G.; Compagnucci, R.
Filiación:Centro de Investigaciones del Mar y la Atmósfera (CIMA), UMI3351-IFAECI CNRS-CONICET-UBA, Int. Guiraldes 2160, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
Centro de Investigaciones del Mar y la Atmósfera (CIMA), UMI3351-IFAECI CNRS-CONICET-UBA, Buenos Aires, Argentina
Departamento de Ciencias de la Atmósfera y los Océanos (DCAO-FCEyN-UBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Palabras clave: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
Año:2013
Volumen:40
Número:7-8
Página de inicio:1863
Página de fin:1878
DOI: http://dx.doi.org/10.1007/s00382-012-1596-5
Título revista:Climate Dynamics
Título revista abreviado:Clim. Dyn.
ISSN:09307575
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v40_n7-8_p1863_Berman

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Citas:

---------- APA ----------
Berman, A.L., Silvestri, G. & Compagnucci, R. (2013) . On the variability of seasonal temperature in southern South America. Climate Dynamics, 40(7-8), 1863-1878.
http://dx.doi.org/10.1007/s00382-012-1596-5
---------- CHICAGO ----------
Berman, A.L., Silvestri, G., Compagnucci, R. "On the variability of seasonal temperature in southern South America" . Climate Dynamics 40, no. 7-8 (2013) : 1863-1878.
http://dx.doi.org/10.1007/s00382-012-1596-5
---------- MLA ----------
Berman, A.L., Silvestri, G., Compagnucci, R. "On the variability of seasonal temperature in southern South America" . Climate Dynamics, vol. 40, no. 7-8, 2013, pp. 1863-1878.
http://dx.doi.org/10.1007/s00382-012-1596-5
---------- VANCOUVER ----------
Berman, A.L., Silvestri, G., Compagnucci, R. On the variability of seasonal temperature in southern South America. Clim. Dyn. 2013;40(7-8):1863-1878.
http://dx.doi.org/10.1007/s00382-012-1596-5