摘要
采用全国主要省会城市的地面气象资料,利用MEM I模型计算了1955—2005年的体感温度(PET-physiological equivalent temperature),并分析了年和季节平均体感温度演化的时间和空间特征。结果表明:近50a来平均体感温度增加了1.745℃,变化速率约为0.349℃/10a,比同期的温度增率高,体感温度的增加主要发生在最近25a里;变化速率的季节差异也很明显,春季高达0.457℃/10a,冬季为0.443℃/10a,秋季为0.361℃/10a,夏季最小仅为0.129℃/10a;我国主要省会城市的极端冷日数在逐年将少,极端热日数在逐年增加;从区域分布上看,只有四个城市(贵阳、乌鲁木齐、长沙、重庆)PET均值在减小,其余城市都在增加,以哈尔滨、海口的变化速率最大。
Based on MEMI model, a set of data from 31 cities was used to analyze the change of physiological equivalent temperature of big cities in China. Analyses have been made for annual and seasonal mean PET. The results show that： a） Annual mean PET of main capital cities in China rose by about 1. 745℃ for the last 50 years, with a changing rate about 0. 349 ℃/10a. The changing rate of PET is larger than the warming rates of temperature in China. （b） The most evident increasing occurred in spring and winter. The changing rates were 0. 457 ℃/10a in spring,0. 443 ℃/10a in winter, 0. 361 ℃/ 10a in autumn and 0. 129 ℃/10a in summer. （c） Annual mean extreme cold days were decreasing and extreme hot days were increasing in main capital cities. （d）The annual mean PET of most capital cities was increasing, except Guiyang, Wunumuqi, Changsha and Chongqing. The increasing rates in Haerbin and Haikou are larger than the others.
出处
《气象科学》
CSCD
北大核心
2009年第2期272-276,共5页
Journal of the Meteorological Sciences
基金
江苏省社会发展面上项目(BS2007066)
国家科技支撑计划项目(2007BAC29B05)
中国气象局气象新技术推广项目(CMATG2006M15)
江苏省气象灾害重点实验室项目(KLME05005)
关键词
大城市
生理等效温度
趋势变化
Big cities Physiological equivalent temperature Change trends
