Abstract: After making trend analysis,morlet wavelet analysis and Mann-Kendall test were used in this study for analyzing air temperature and precipitation annual variabilityfrom 1960 to 2012 in Linzhi Station,Tibet,China. It is found that there existed a increasing trend with 0.028℃·a^-1 and characteristic periods of 3-4 years for mean air temperature,but there was no obvious main period for mean air temperature,and there were three abrupt changes for mean air temperature,which were the years of 1972-1973,1975-1976 and 1977-1978.There existed a slowly increasing trend for annual precipitation with 1.1218 mm·a^-1,there also existed characteristic periods of 4 years,10 years and 20 years for annual precipitation,and there were two main periods of 2 and 10 years for precipitation,there were four abrupt changes for precipitation,which were the years of 1960-1961,1965-1966,1977-1978 and 1982-1983.

Key words: Linzhi, Wavelet analysis, Mann-Kendall test, air temperature, precipitation