1960-2009年朝阳市气候暖干化研究

Research on warming and drying of climate in Chaoyang city during 1960-2009

温室效应引起全球变暖是近几十年来气候变化的主要特征,探讨辽宁朝阳地区气候变化趋势,是研究该区域生态环境变化的重要内容,本文利用1960-2009年辽宁省朝阳市气温和降水资料,对近50年来朝阳地区的气候变化特征进行了分析。结果表明1960年以来,朝阳地区年、季平均气温均呈明显上升趋势,气温最高年份大多出现在20世纪90年代后;1970年以来,该区平均年降水量呈减少趋势,季平均降水量也呈显著减小趋势,其中夏季减小趋势最为明显,降水量的线性趋势率达-1.51 mm/a。气温上升,降水量减少,使辽宁朝阳地区气候呈暖干化趋势。

The global warming caused by green-house efIect in recent decades is the main characteristic of climate change, to explore Liaoning Chaoyang district climate, is an important content of regional ecological environment study. Based on the data of temperature and precipitation from Liaoning Chaoyang in China from 1960 to 2009, the climate change and its characteristic of the regions in recent 50 years have been analyzed. The results show that, since 1960 Chaoyang＇s year and season average temperatures are showing clear ascendant trend, the highest temperature mostly appeared after the 90 s; Since 1970 the annual precipitation decreased, season average precipitation also shows significantly reduce trend, and the most obvious decrease trend is in summer, which precipitation linear trend rate was 1.51 mm/a.The temperature rise, precipitation decreased, make Liaoning Chaoyang district climate warm and dry.