1971-2016年新疆极端温度时空变化特征分析

基于新疆地区42个气象站点1971-2016年逐日温度数据资料,选取世界气象组织(WMO)推荐的10个极端温度指标,使用线性趋势法、克里金插值法和Mann-Kendall突变检验等方法,分析该地区极端温度指数在时间和空间上的变化规律.结果 表明:新疆地区1971-2016年间4个极端高温指数均呈现出明显的上升趋势,除极...

Temporal and Spatial Variation Characteristics of Extreme Temperature in Xinjiang from 1971 to 2016

Based on daily temperature data from 42 meteorological stations in Xinjiang from 1971 to 2016,10 extreme temperature indicators recommended by the World Meteorological Organization(WMO)were selected.The temporal and spatial variation rules of the extreme temperature index in the region were analyzed through using linear trend method,Kriging interpolation method and Mann-Kendall mutation test.The results showed as follows.The four extreme high temperature indexes in Xinjiang from 1971 to 2016 all showed a clear upward trend.Except for the extreme minimum temperature index,the other indexes characterizing extreme low temperature all showed a downward trend.The three extreme high temperature indexes(SU,TXx,TX90P),three extreme low temperature indexes(FD,TNn,TX10P)and two extreme continuity indexes(WSDI,CSDI)all changed abruptly from 1971 to 2016.The mutation began as early as the late 1970s and concentrated in the 1990s.The change characteristics of the extreme temperature index showed a spatial transition trend from southeast to northwest.Under the background of the increasing trend of global warming,analyzing the characteristics of the space-time changes of extreme cold and warm temperature in Xinjiang from 1971 to 2016,the conclusions of which the temperature in Xinjiang is obviously increasing,and the warming in the north and east is stronger than in the south were obtained.It provided some data support for the research on climate change in Xinjiang.