吐鲁番盆地1976~2015年降水变化特征分析

Analysis of Precipitation Variation Characteristics in Turpan Region over Period from 1976 to 2015

选用吐鲁番地区5个国家级观测站1976~2015年40年的逐年、逐月降水量资料,采用线性趋势检验、滑动平均、Mann-Kendall趋势检验法分析吐鲁番地区盆地和山区降水量的分布特征。结果表明,吐鲁番盆地降水国家级站中除东坎站的降水呈缓慢减少趋势外,其余4个站的降水均呈缓慢增加趋势;山区站(库米什站)与平原站(其余4站)降水的变化趋势有所不同,山区站降水变化趋势更加明显;山区站在80年代中期存在增多的突变,随着海拔的增加降水量有增多趋势,平原地区降水不存在突变。

Based on the yearly and monthly precipitation records at 5 national weather stations during the period from 1976 to 2015 in the Turpan Basin, the characteristics of plain and mountain precipitation in Turpan region over 40 years were analyzed by using methods including the linear regression analysis method, moving average and Mann-Kendall trend testing. The results show that the precipitation has a slowly increase trend in plain regions of the Turpan Basin expect Dongkan station. The precipitation changes are different between plain regions and mountain regions in Turpan basin, the more obvious of precipitation trend in mountain stations and there are sudden changes in the mid 80s from dry to wet;the precipitation has a rising trend with the increase of altitude. The abrupt of plain precipitation was not obvious.