Arid Zone Research ›› 2022, Vol. 39 ›› Issue (6): 1695-1705.doi: 10.13866/j.azr.2022.06.01

• Weather and Applied Climate • Previous Articles     Next Articles

New characteristics of spatio-temporal evolution of extreme climate events in Xinjiang under the background of warm and humid climate

WU Xiaodan1,2(),LUO Min1,2(),MENG Fanhao1,2,SA Chula1,2,YIN Chaohua1,2,BAO Yuhai1,2   

  1. 1. College of Geographical Science, Inner Mongolia Normal University, Hohhot 010022, Inner Mongolia, China
    2. Inner Mongolia Key Laboratory of Remote Sensing & Geography Information System, Hohhot 010022, Inner Mongolia, China
  • Received:2022-04-18 Revised:2022-07-25 Online:2022-11-15 Published:2023-01-17
  • Contact: Min LUO E-mail:wxd17748355132@163.com;luomin@imnu.edu.cn

Abstract:

Based on the daily meteorological data from 1982 to 2020, the spatial and temporal variability characteristics of extreme climate events in Xinjiang were analyzed using the methods of trend analysis, correlation analysis, Hurst index, and relative importance. The results indicate that the extreme temperature indices in Xinjiang show a warming trend, and the proportion of stations with different extreme temperature indices show a warming trend of 50.98%-100%. The temperature of the cold index was higher than that of the warm index, and the warming trend in southern Xinjiang is more significant than that in northern Xinjiang. Except for the continuous drought index, CDD, the overall extreme precipitation indices showed no significant upward trend, and the proportion of stations with an upward trend was 61.76%-85.29%. The increase in extreme temperature frequency indices, total precipitation, and moderate and light rain days significantly contributed to the warming and humidification trend in Xinjiang. Except for freezing days ID and annual mean rain days precipitation intensity SDII, the changes of other extreme climate indices were sustainable, and the extreme precipitation and warming trend of most extreme temperatures, especially the cold index, were more obvious at high altitudes.

Key words: warm and humid climate, extreme climate, spatiotemporal characteristics, altitude dependence, Xinjiang