Analysis on the Climate Change towards Warming-wetting Trend in Shihezi Region in Recent 40 Years

The changing characteristics of temperature,rainfall and aridity index in recent 40 years in Shihezi region were analyzed in this paper.The results show:(1) The changing trend of temperature there is on the increase of 0.3 ℃/10 a,which is consistent with that in the whole region of Xinjiang;the annual,winter and summer mean temperatures descended from 1960s to 1970s,ascended from 1980s to 1990s,and rose more obviously in winter than that in summer in 1980s,but just the reverse in 1990s.(2)The rainfall increased generally,and the increasing rate is 12.5 mm/10 a,the mean precipitation in 1990s is 20.8% more than that in the past 30 years.(3)The annual mean aridity index descended generally,but the trend was not obvious,the descending rate is-0.3/10 a.(4) There were some abrupt changes with different degree in temperature,rainfall and aridity index in different years tested by Mann-Kendall means,all these showed that climate in Shihezi region was becoming warm and wet,and this is in favor of oasis development there.