摘要
为了了解全球变暖背景下四川盆地的气候变化规律及其演变趋势,该文利用四川盆地22个气象台站1961-2007年月平均气温、月平均最高气温、月平均最低气温、月降水资料,对四川盆地近半个世纪以来的气温、降水变化进行了分析。结果表明:近50a来四川盆地年平均气温呈上升趋势,但增温幅度明显低于全国平均水平,偏暖年份多发生在20世纪90年代以后,偏冷年份多出现在90年代中期以前,尤其集中在80年代;秋、冬季变暖的趋势大于春、夏季,夜间升温幅度大于白天。四川盆地年降水量呈下降趋势,少雨年多在70年代和90年代以后,多雨年多发生在60年代和80年代;除冬季外其余各季节的降水量均呈减少趋势,秋季减少最明显。
In order to understand the law of climate change and its evolution trend in Sichuan basin under global warming,the change of the air temperature and precipitation during the recent half century in Sichuan basin had been analyzed based on monthly mean,maximum,minimum air temperature and monthly mean precipitation data of the 22 weather stations in Sichuan basin from 1961 to 2007.The main findings were summarized as follows: annual mean air temperature of Sichuan basin was on the rise during recent 50 years,but warming rate was significantly lower than the national average level.The more warmer years were mostly after 1990's,the more colder years were mostly before the mid-1990's,especially in 1980's.Temperature rising rate of autumn and winter were higher than that of spring and summer,meanwhile that of night was higher than that of daytime.Simultaneously,the precipitation totally presented a decreasing tendency in Sichuan basin.There were drought years in 1970's and after 1990's.The rainy years were mostly in 1960's and 1980's.Precipitation in other seasons showed a decreasing tendency except winter,and the most obvious reduction happened in autumn.
出处
《中国农业气象》
CSCD
2010年第S1期27-31,共5页
Chinese Journal of Agrometeorology
基金
教育部高等学校科技创新工程重大项目培育资金项目(708013)
国家科技支撑计划重大课题(2007BAC03A02)
中国气象局成都高原气象研究所高原气象开放实验室基金项目"气候变化对四川主要农作物生产的影响"
关键词
四川盆地
气温
降水
Sichuan basin
Air temperature
Precipitation
