Low frequency oscillation of rainfall in Córdoba, Argentina, and its relation with solar cycles and cosmic rays

The aim of this paper is to present the partial trends of rainy days and total precipitation in Córdoba Province, Argentina, during the period 1960–2010 and the full range of precipitation for the Córdoba Observatory station, which has the longest measurement record in Argentina, 1873–2010, and to show the relationship between these variables and solar activity.A strong association is shown between break points when the trend changes for both the number of rainy days and the total precipitation, and the occurrence of maxima in the sunspot cycle, indicating that these variables are modulated by the solar Hale cycle and probably by the influence of cosmic rays.

► We present the partial trends of rainy days and total precipitation in Córdoba Province, Argentina.
► The trend breakpoints and the maximum in the sunspot cycle are highly correlated.
► The precipitation in the region could be related with variations in cosmic rays.