Comparative Analysis of the Climate Abrupt Changing Time in Different Ecological Function Regions of Qinghai Province
Qinghai Province is divided into the Eastern Agricultural area,the area around Qinghai Lake,area of Three Rivers Sources and the Qaidam Basin according to geographical location and geomorphic features.Annual and seasonal abrupt changes of mean air temperature and total precipitation are detected based on data of monthly mean air temperature and monthly total precipitation from 1961 to 2008.It is found that 1)temperature: The annual and seasonal temperatures are all increasing;temporally,winter is the most significant change season,followed by autumn,spring and summer are less changing.Spatially,the Qaidam Basin is the earliest abrupt changing area in annual mean air temperature,followed by the Eastern Agricultural area and the area around Qinghai Lake,and the latest one is the area of Three Rivers Sources.The abrupt changing time of seasonal mean air temperature is not the same between the four areas.2) Precipitation: The changing trend of annual precipitation is not obvious,except for the Qaidam Basin,where annual precipitation is increasing.Seasonal precipitation changing is not obvious in the main in spring,summer and autumn,but obvious in winter(except for the Eastern Agricultural area).In addition,the abrupt changing signal of precipitation is weak than that of air temperature(except for a few area in individual season).
NETL
NSTL
万方数据
维普
