Variation and trends detection of precipitation, evaporation and temperature in Taiyuan in recent 60 years

Based on the meteorological data from 6 stations in Taiyuan, variation characteristics of precipitation, evaporation and temperature in recent 60 years were analyzed, and variation trends of the three meteorological elements in Taiyuan were detected with linear regression method and Mann-Kendall rank correlation method. The results indicate that annual precipitation in Taiyuan during 1951~2006 presented weak decreasing trend which has been obviously since 1990´s with average decreasing rate of 13.03mm/10a; among four seasons, decreasing in autumn is the most significant for the rate of 6.13 mm/10a. Annual evaporation in Taiyuan showed obvious decreasing trend from 1970´s, and the average rate is 16.28mm/10a, as for seasons, decreasing trend in summer to be the most significant as decreasing rate is 8.42 mm/10a. Annual average temperature presented evident increasing trend from 1980´s with the warming rate of 0.38°C/10a, temperature increasing trend in winter to be more significant than in other seasons, and average rate is 0.61°C/10a.