Variaciones recientes de la temperatura en España. El efecto del periodo elegido en las series estacionales de promedios de máximas y mínimas

In a temporal data series the signal of trend, intensity and significance vary accordingly selected period, and this is especially true in climate analyses. In this research we present an analyses of seasonal trend variations of maximum and minimum temperature in Spanish conterminous land (1951-2010). Significance of trends is identified by using Man-Kendall test, and rate by Sen´s approach. The results show no significant trend in winter and autumn in maximum and minimum temperature in recent decades. Spring maximum is not significant in recent decades but is significant in minimum; summer trends are not significant for the last decades. The rates of maximum and minimum for the last decades decrease, and minimum usually show highest value than maximum from the beginning of 90´s.