1957～2009年河南省季节变化特征分析

利用10和22℃2个界限温度,采用5 d滑动平均温度的方法来计算春、夏、秋、冬四季开始时间和持续长短。结果表明,河南冬季最长,其次是夏季,秋季和春季长度很相近,秋季略短;各季节的开始时间发生了变化,春、秋季开始时间提前,夏、冬季开始时间推后,春、夏、秋、冬季开始时间变化气候倾向率分别为-1.804、0.843、-0.947、0.834 d/10a;各季节长短也发生了变化,春、秋季变长,夏、冬季缩短,春、夏、秋、冬季长短变化气候倾向率分别为2.667、-1.767、1.723、-2.820 d/10a。

Analysis on Seasonal Variation Characteristics of Henan Province from 1957 to 2009

By using 10 and 22 ℃ two limit temperature,the start and sustained times of four seasons were calculated with the method of 5 d moving average temperature.The results showed that: on sustained time,winter was the longest season,then summer,spring and autumn were similar,while autumn was slightly shorter.Beginning time of different seasons has changed.Spring's and autumn's have advanced,while summer's and winter's have postponed.The tendency rate of climate change of four seasons was-1.804,0.843,-0.947,0.834 d/10a.Length of different seasons has also changed.Spring's and autumn's have obviously become longer,though summer's and winter's have become shorter.The sustained time rate of climate change of four seasons was 2.667,-1.767,1.723,-2.820 days every ten years respectively.