Analysis on heat waves variation features in China during 1961-2014
Based on the definition of high temperature threshold and Heat-Wave Magnitude Index (HWMI),the temporal and spatial characteristics of temperature,heat wave frequency were analyzed by using the daily maximum temperature data from 716 observational stations in China during 1961-2014.Results show that the high temperature day in the area starting early (late) ends up late (early).Abrupt changes of high temperature days mainly happened between the end of twentieth century and the beginning of twenty-first century.Severe heat waves last from early July to early September and have great differences in each period of ten days.In Yunnan,most heat waves happen in May and seldom in other months.In addition to Huaihe River Basin,the tendency of heat wave frequency shows a wide range of positive value,especially in Guangxi,Guangdong,Yunnan and Hainan.HWMI index shows that index decreased progressively from 1960's to 1980's,while it increased progressively after 1990's.What's more,extreme and severe heat-wave has occurred more frequently since 1998,especially in the southern regionof Yangtze River.
Heat waveHeat-wave magnitude indexTemporal and spatial characteristics
国家科技期刊平台
NSTL
万方数据
维普
