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Abstract:

We analyzed trends, interdecadal variability, and the quantification of the changes in the frequency of daily rainfall for two thresholds: 0.1 mm and percentile 75th, using high quality daily series from 52 stations in the La Plata Basin (LPB). We observed increases in the annual frequencies in spatially coherent areas. This coherence was more marked in austral summer, autumn, and spring, during which the greatest increases occurred in southern Brazil, especially during extreme events. In winter, the low and middle basins of the Río Uruguay and Río Paraná showed negative trends, some of which were significant. Interdecadal variability is well defined in the region with more pronounced positive jumps west of the basin between 1950 and 2000. This variability was particularly more marked during periods of extreme rainfall in summer, autumn, and spring, unlike in winter when extreme daily rainfall in the lower Rio Paraná basin decreased by up to 60%. The changes in the past century during extreme rainfall produced modifications in the annual rainfall cycle. The annual cycle of both indices was broader during the last period which is mainly explained by the strong decreases in winter. © Springer Science + Business Media B.V. 2009.

Registro:

Documento: Artículo
Título:Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century
Autor:Penalba, O.C.; Robledo, F.A.
Filiación:Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Palabras clave:20th century; Annual cycle; Annual rainfall; Austral summers; Daily rainfall; Extreme events; Extreme rainfall; High quality; Inter-decadal variability; La Plata basin; Southern Brazil; Spatial and temporal variability; Uruguay; Rain; annual cycle; decadal variation; regional climate; seasonal variation; spatial variation; twentieth century; La Plata Basin
Año:2010
Volumen:98
Número:3
Página de inicio:531
Página de fin:550
DOI: http://dx.doi.org/10.1007/s10584-009-9744-6
Título revista:Climatic Change
Título revista abreviado:Clim. Change
ISSN:01650009
CODEN:CLCHD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01650009_v98_n3_p531_Penalba

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Citas:

---------- APA ----------
Penalba, O.C. & Robledo, F.A. (2010) . Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century. Climatic Change, 98(3), 531-550.
http://dx.doi.org/10.1007/s10584-009-9744-6
---------- CHICAGO ----------
Penalba, O.C., Robledo, F.A. "Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century" . Climatic Change 98, no. 3 (2010) : 531-550.
http://dx.doi.org/10.1007/s10584-009-9744-6
---------- MLA ----------
Penalba, O.C., Robledo, F.A. "Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century" . Climatic Change, vol. 98, no. 3, 2010, pp. 531-550.
http://dx.doi.org/10.1007/s10584-009-9744-6
---------- VANCOUVER ----------
Penalba, O.C., Robledo, F.A. Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century. Clim. Change. 2010;98(3):531-550.
http://dx.doi.org/10.1007/s10584-009-9744-6