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Artículo

Inter-annual and inter-decadal variability of dry days in Argentina

Rivera, Juan AntonioIcon ; Penalba, Olga ClorindaIcon ; Bettolli, Maria LauraIcon
Fecha de publicación: 03/2013
Editorial: Royal Meteorological Society
Revista: International Journal Of Climatology
ISSN: 0899-8418
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Investigación Climatológica

Resumen

This work proposes to employ the number of dry days (days without precipitation) as a variable of study, and to analyse their spatial and temporal variability in Argentina. Climatological aspects of dry days, such as their annual mean values and its seasonal cycle, were discussed and compared with precipitation features in the country. Linear trends in the annual number of dry days (ANDD) were identified for the period 1960–2005. Most of the regions exhibited decreasing trends, but few stations showed significant ones. The most important trends were present in the Central-West region and over the Patagonian coast and their magnitudes indicated a decrease of two to six dry days per decade. These trends coincide with the observed increase of accumulated precipitation in part of the country during the second half of the 20th century. To identify long-term fluctuations in the ANDD, a low pass filter, a wavelet analysis and a cubic polynomial fit was applied to the longest time series of the selected locations. Through these methodologies, periodicities were identified in the inter-annual and inter-decadal ranges for the last 80 years. The most important significant cycles were observed in the range of 10–24 years, but also, depending on the region, significant inter-annual variations were found.
Palabras clave: Dry Days , Climatology , Linear Trends , Wavelet Analysis
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/15852
DOI: http://dx.doi.org/ 10.1002/joc.3472
URL: http://onlinelibrary.wiley.com/doi/10.1002/joc.3472/abstract
Colecciones
Articulos(OCA CIUDAD UNIVERSITARIA)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Citación
Rivera, Juan Antonio; Penalba, Olga Clorinda; Bettolli, Maria Laura; Inter-annual and inter-decadal variability of dry days in Argentina; Royal Meteorological Society ; International Journal Of Climatology; 33; 4; 3-2013; 834-842
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