Temperature Variations in Spain Since 1901: A Preliminary Analysis

The long-term temperature trends since 1901 at ten meteorological stations on the Iberian Peninsula and one in the Canary Islands are analysed. These trends are identified by applying the Mann–Kendall trend test to the series of maximum and minimum temperatures, the variability of both, and the diurnal temperature range. A multidimensional scaling analysis is used to produce an automatic grouped systemization of all trends.The results appear to confirm the hypothesis of a local regionalization of the more global influences, yielding three types of regional trends in temperature variations since 1901: (i) less extreme in the north and north-west; (ii) more extreme conditions in the south-east and centre-east; and (iii) an overall increase in the south-west.