Artículo

Blázquez, J.; Solman, S.A."Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America" (2017) Climate Dynamics. 48(7-8):2569-2579
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Abstract:

The interannual variability of the frontal activity over the western Southern Hemisphere and its linkage with the variability of the atmospheric circulation and precipitation over southern South America is studied. The analysis is focused on the austral winter and spring seasons. The frontal activity is represented by an index defined as the product between the horizontal gradient of temperature and the relative vorticity at 850 hPa (FI) and is computed from the ERA Interim and NCEP2 reanalysis. For the two seasons the main mode of variability of FI, as depicted by the first Empirical Orthogonal Function, presents centres of action located in the southern part of the western Southern Hemisphere. This pattern is present in the two reanalysis datasets. The correlation coefficients between the principal component of the leading mode of FI and the two main modes of the 500 hPa geopotential height indicate that both the ENSO-mode and the SAM modulate the leading pattern of FI in winter while during the spring season the ENSO-mode controls the FI variability. The variability of the FI has a robust influence on the interannual variability of precipitation over southern South America and adjacent oceans. Over the continent, it was found that the pattern of precipitation anomalies associated with the variability of the FI depicts significant signals over southeastern South America (SESA), centre and south of Chile for winter and over SESA and southeastern Brazil for spring and agrees with the pattern of the leading mode of precipitation variability over southern South America. © 2016, Springer-Verlag Berlin Heidelberg.

Registro:

Documento: Artículo
Título:Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America
Autor:Blázquez, J.; Solman, S.A.
Filiación:Centro de Investigaciones del Mar y la Atmósfera (CIMA-CONICET/FCEN-UBA), Departamento de Ciencias de la Atmósfera y los Océanos (FCEN-UBA), Instituto Franco Argentino del Clima y sus Impactos (UMI IFAECI/CNRS), Ciudad Universitaria Pabellón II Piso 2, Buenos Aires, C1428EGA, Argentina
Palabras clave:Atmospheric circulation; Frontal activity; Interannual variability; Precipitation; Southern Hemisphere; annual variation; atmospheric circulation; El Nino-Southern Oscillation; precipitation (climatology); Southern Hemisphere; spring (season); winter; Brazil; Chile
Año:2017
Volumen:48
Número:7-8
Página de inicio:2569
Página de fin:2579
DOI: http://dx.doi.org/10.1007/s00382-016-3223-3
Handle:http://hdl.handle.net/20.500.12110/paper_09307575_v48_n7-8_p2569_Blazquez
Título revista:Climate Dynamics
Título revista abreviado:Clim. Dyn.
ISSN:09307575
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v48_n7-8_p2569_Blazquez

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Citas:

---------- APA ----------
Blázquez, J. & Solman, S.A. (2017) . Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America. Climate Dynamics, 48(7-8), 2569-2579.
http://dx.doi.org/10.1007/s00382-016-3223-3
---------- CHICAGO ----------
Blázquez, J., Solman, S.A. "Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America" . Climate Dynamics 48, no. 7-8 (2017) : 2569-2579.
http://dx.doi.org/10.1007/s00382-016-3223-3
---------- MLA ----------
Blázquez, J., Solman, S.A. "Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America" . Climate Dynamics, vol. 48, no. 7-8, 2017, pp. 2569-2579.
http://dx.doi.org/10.1007/s00382-016-3223-3
---------- VANCOUVER ----------
Blázquez, J., Solman, S.A. Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America. Clim. Dyn. 2017;48(7-8):2569-2579.
http://dx.doi.org/10.1007/s00382-016-3223-3