Precipitation anaIysis in Villa Mercedes (San Luis) 1899/00-1984/85

  • J. A. Bertón Universidad Nacional de San Luis, J.T.P. de la Cátedra de Climatología y Fenología Agrícola
  • A. Z. Corral Universidad Nacional de San Luis, Prof. Adj. de la Cátedra de Biometría y Diseño Experimental

Abstract

This paper presents the results of an analysis of rainfall regime in Villa Mercedes (San Luis) from 1899/00 to 1984/85. The rainfall regime in the area is typically mensoonic, 78% of precipitation falling in spring-summer. According to PROHASKA classification the type is Normal dry. More than 50% of the years studied have received between 50 and 70 cm. per year. The highest variability (variance ratio) has been observed during autumn-winter months, 95% confidence intervals for different month rainfall show the validity of monthly averages. The annual rainfall maximum value is 3,57 times greater than the minimum one. Both annual and spring-summer rainfall trends, which have been fortnightly analyzed, are similar r=0,63 and r=0,92 respectively. This show that the annual amount increase is restricted to the wet season. Mean precipitation amount during the autumn-winter period does not reveal the presence of a real trend (r=0.36).

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Published

2020-07-07

How to Cite

Bertón, J. A., & Corral, A. Z. (2020). Precipitation anaIysis in Villa Mercedes (San Luis) 1899/00-1984/85. Semiárida, 4(1), 1–8. Retrieved from https://ojs.unlpam.edu.ar/index.php/semiarida/article/view/5100

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Artículos Científicos y Técnicos