Trend of Extreme Temperature in Southwest China in the Recent 41 Years
Based on the maximal/minimum daily temperature data of 90 meteorological stations in South‐west China during 1970 - 2010 and 4 extreme temperature indices defined by the world meteorological or‐ganization ,F test ,Mann‐Kendall test and wavelet analysis were made to analyze the temporal and spatial distributions of extreme temperature events in Southwest China in the 41 years .The results indicated that in the 41 years ,hot days and cold days were basically symmetrical in local places ,while hot nights and cold nights were symmetrical in most areas .In the recent 41 years hot extreme indices showed a significant increasing trend ,while cold extreme indices showed a significant decreasing trend .There were significant mutations of hot days and cold nights around 2004 and 1994 ,respectively ;a mutation of cold days oc‐curred in 1997 ;while no mutation was observed in the number of hot nights .The periodic oscillation of hot extreme indices and cold extreme indices were not the same ,but both of them showed a four‐year periodic oscillation .
NETL
NSTL
万方数据
维普
