SPATIAL AND TEMPORAL ANALYSIS OF PRECIPITATION VARIABILITY IN THE SPANISH SECTOR OF DUERO BASIN (1961-2005)

This work focuses on the spatial and temporal variability of precipitation in the Spanish sector of the Duero basin, for the period 1961-2005 (n=45), and the analysis of temporal trends. Results highlight a marked variability on the seasonal, inter-annual and spatial basis, which usually mask the existence of trends at the monthly and annual scale. Thus, only February shows a negative and significant trend across most of the territory, while annual precipitation has remained rather stationary at the long-term. These results confirm, with few exceptions, the absence of significant trends of precipitation in Southern Europe during the second half of the 20th century.