中国水汽变化与气温日较差变化的特征及其相互联系

The Characteristics of Water Vapor Variation and Diurnal Temperature Variation in China and their Correlation

利用中国1961—2010年气候观测数据,分析不同区域气温日较差变化和水汽变化趋势以及两者间关系。结果表明:(1)各地区气温日较差均显著增加,北方较南方趋势更为明显;除内蒙古和以两广地区为主的部分南方地区,水汽基本呈增长变化,气温日较差变化趋势显著于水汽;(2)气温日较差和水汽变化在冬季均表现出较强变化特点,其他季节变化区别不大;(3)气温日较差与水汽压基本表现出反向变化情况,且在内陆地区体现更明显。

Using the climate observation data of China from 1961 to 2010,the variation trend of daily temperature range and water vapor variation in different regions and the relationship between them were analyzed.The results showed that:(1)the diurnal temperature range in all regions increased significantly,and the trend was more obvious in the north than in the south;Except for Inner Mongolia and some southern regions dominated by Guangdong and Guangdong,water vapor basically showed an increasing trend,and the variation trend of daily temperature range was more significant than water vapor.(2)The diurnal temperature range and water vapor change show strong variation characteristics in winter,but there is little difference in other seasons.(3)The daily temperature range and water vapor pressure basically show a reverse change,which is more obvious in inland areas.