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Liebmann, B.; Vera, C.S.; Carvalho, L.M.V.; Camilloni, I.A.; Hoerling, M.P.; Allured, D.; Barros, V.R.; Báez, J.; Bidegain, M. "An observed trend in central South American precipitation" (2004) Journal of Climate. 17(22):4357-4367
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Abstract:

Seasonal linear trends of precipitation from South American station data, which have been averaged onto grids, are examined, with emphasis on the central continent. In the period 1976-99, the largest trend south of 20°S occurs during the January-March season, is positive, and is centered over southern Brazil. From 1948 to 1975 the trend is also positive, but with less than half the slope. The trend is not due to a systematic change in the timing of the rainy season, which almost always starts before January and usually ends after March, but rather results from an increase in the percent of rainy days, and an increase in the rainy day average. The dynamic causes of the trend are not obvious. It does not appear to be accounted for by an increase in synoptic wave activity in the region. The precipitation trend is related to a positive sea surface temperature trend in the nearby Atlantic Ocean, but apparently not causally. The trend in the Atlantic seems to result from a decrease in mechanical stirring and coastal upwelling associated with a decrease in the strength of the western edge of the circulation associated with the South Atlantic high. © 2004 American Meteorological Society.

Registro:

Documento: Artículo
Título:An observed trend in central South American precipitation
Autor:Liebmann, B.; Vera, C.S.; Carvalho, L.M.V.; Camilloni, I.A.; Hoerling, M.P.; Allured, D.; Barros, V.R.; Báez, J.; Bidegain, M.
Filiación:NOAA-CIRES Climate Diagnostic Center, R/CDC1, 325 Broadway, Boulder, CO 80305-3328, United States
CIMA-CONICET/UBA, Dept. of Atmospheric/Oceanic Sci., University of Buenos Aries, Buenos Aries, Argentina
Department of Atmospheric Sciences, Institute of Astronomy/Geophysics, University of São Paulo, São Paulo, Brazil
Dept. of Atmospheric/Oceanic Sci., University of Buenos Aries, Buenos Aries, Argentina
Direccion de Meteorologia/Hidrol., DINAC, Luque, Paraguay
Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
Palabras clave:Coastal zones; Data reduction; Sea level; Temperature; Coastal upwelling; Grids; Precipitation (meteorology); air-sea interaction; precipitation (climatology); sea surface temperature; seasonality; trend analysis; upwelling; Atlantic Ocean; Atlantic Ocean (South); oceanic regions; South America; Western Hemisphere; World
Año:2004
Volumen:17
Número:22
Página de inicio:4357
Página de fin:4367
DOI: http://dx.doi.org/10.1175/3205.1
Título revista:Journal of Climate
Título revista abreviado:J. Clim.
ISSN:08948755
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948755_v17_n22_p4357_Liebmann

Referencias:

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Citas:

---------- APA ----------
Liebmann, B., Vera, C.S., Carvalho, L.M.V., Camilloni, I.A., Hoerling, M.P., Allured, D., Barros, V.R.,..., Bidegain, M. (2004) . An observed trend in central South American precipitation. Journal of Climate, 17(22), 4357-4367.
http://dx.doi.org/10.1175/3205.1
---------- CHICAGO ----------
Liebmann, B., Vera, C.S., Carvalho, L.M.V., Camilloni, I.A., Hoerling, M.P., Allured, D., et al. "An observed trend in central South American precipitation" . Journal of Climate 17, no. 22 (2004) : 4357-4367.
http://dx.doi.org/10.1175/3205.1
---------- MLA ----------
Liebmann, B., Vera, C.S., Carvalho, L.M.V., Camilloni, I.A., Hoerling, M.P., Allured, D., et al. "An observed trend in central South American precipitation" . Journal of Climate, vol. 17, no. 22, 2004, pp. 4357-4367.
http://dx.doi.org/10.1175/3205.1
---------- VANCOUVER ----------
Liebmann, B., Vera, C.S., Carvalho, L.M.V., Camilloni, I.A., Hoerling, M.P., Allured, D., et al. An observed trend in central South American precipitation. J. Clim. 2004;17(22):4357-4367.
http://dx.doi.org/10.1175/3205.1