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Abstract:

Long, annual precipitation time series from central-northeastern Argentina are analysed with special attention to interdecadal and interannual variations. The results show a variability that is highly nonstationary. The most outstanding feature is the difference in annual precipitation before and after the 1950s. The interdecadal variability is particularly well defined in the west, and there is a significant linear trend in the study area. Negative anomalies of the areal-averaged annual precipitation can be observed in all the areas around 1910 and 1930 or 1940. In the western zone there are two better-defined negative periods around 1950 and 1970, and a gradual increase can be observed in the eastern zones starting in the 1950s. The interdecadal and interannual variations affect the behaviour of extreme precipitation on the annual scale and during the months with maximum precipitation in the region. In support of these conclusions, different representation methods are used (running means, power spectrum analysis, and wavelet transforms). The variations in the annual cycle of extreme precipitation under different conditions are analysed by applying harmonic analysis. The wettest years are represented by an annual and semi-annual cycle, whereas dry years need the input of lower frequency cycles. © 2004 Royal Meteorological Society.

Registro:

Documento: Artículo
Título:Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina
Autor:Penalba, O.C.; Vargas, W.M.
Filiación:Depto. Cs de la Atmosfera Oceanos, Facultad de Ciencias Exactas y Nat., Universidad de Buenos Aires, Buenos Aires 1428, Argentina
Palabras clave:Annual variability; Decadal variability; Extreme events; Rainfall; Climatology; Environmental engineering; Harmonic analysis; Spectrum analysis; Tropical engineering; Wavelet transforms; Interdecadal variability; Interdecadal variations; Power spectrum; Precipitation (meteorology); annual variation; anomaly; decadal variation; extreme event; harmonic analysis; precipitation (climatology); Argentina; South America; Western Hemisphere; World
Año:2004
Volumen:24
Número:12
Página de inicio:1565
Página de fin:1580
DOI: http://dx.doi.org/10.1002/joc.1069
Título revista:International Journal of Climatology
Título revista abreviado:Int. J. Climatol.
ISSN:08998418
CODEN:IJCLE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v24_n12_p1565_Penalba

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Citas:

---------- APA ----------
Penalba, O.C. & Vargas, W.M. (2004) . Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina. International Journal of Climatology, 24(12), 1565-1580.
http://dx.doi.org/10.1002/joc.1069
---------- CHICAGO ----------
Penalba, O.C., Vargas, W.M. "Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina" . International Journal of Climatology 24, no. 12 (2004) : 1565-1580.
http://dx.doi.org/10.1002/joc.1069
---------- MLA ----------
Penalba, O.C., Vargas, W.M. "Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina" . International Journal of Climatology, vol. 24, no. 12, 2004, pp. 1565-1580.
http://dx.doi.org/10.1002/joc.1069
---------- VANCOUVER ----------
Penalba, O.C., Vargas, W.M. Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina. Int. J. Climatol. 2004;24(12):1565-1580.
http://dx.doi.org/10.1002/joc.1069