1956-2006年中国高温日数的变化趋势

 利用全国541个站的均一化日最高气温资料,分析了高温日数的时空变化特征及其对全球变暖的响应。结果表明：1956-2006年我国高温日数有两个高值中心,分别出现在吐鲁番盆地和江南地区。高温日数呈现"增加－减少－增加"的趋势;新疆的高温日数有准3 a的周期变化,中国东部4个地区的高温日数都存在3～6 a的周期变化。中东部地区高温日数由减少转变为增加趋势的时间并不一致,随着纬度的增加而逐渐延迟。

The Trend of Variation in High Temperature Days During 1956-2006 in China

By using 541-station uniform maximum temperature in China, the temporal and spatial distributions of yearly high temperature days with daily maximum temperature ≥35℃ and their responses to global warming were analyzed. The results show that the average high temperature days have two high centers in Turpan Basin and Jiangnan region. The high temperature days have an evolutional trend of increasing-decreasing-increasing and show the significant 3-year period in Xinjiang and the 3- to 6-year period in the 4 regions of eastern China. The time of trend changing from decreasing to increasing is not synchronous for the whole country, and it gets later with the increasing latitude.