河南省春季降水日数变化趋势  

CLIMATIC TREND OF RAIN DAYS DURING SPRING IN HENAN PROVINCE

作　　者：王纪军[1,2,3] 裴铁璠[1] 陈正洪[4] 柳俊高[3] 吴蓁[3] 

机构地区：[1]中国科学院沈阳应用生态研究所,辽宁沈阳110016 [2]中国科学院研究生院,北京100039 [3]河南省气候中心,河南郑州450003 [4]武汉区域气候中心,湖北武汉471000

出　　处：《长江流域资源与环境》2008年第A01期36-40,共5页Resources and Environment in the Yangtze Basin

基　　金：河南省科技攻关项目(0624460004;072102320006);中国气象局气候变化专项(CCSF-2007-21);武汉区域气象中心科技发展基金重点项目(QY-Z-200807)资助

摘　　要：气候变化问题越来越受到公众的关注,我国许多学者对中国近代气候变化规律等方面做了诸多研究。河南作为粮食大省和水资源缺乏的省份之一,影响粮食生产的降水量的具体变化研究尤显重要。通过分析河南省49个台站近50年来的日降水资料,对河南省春季降水量的变化进行统计分析。结果表明,河南省春季及其代表月4月份的平均降水日数均具有显著的下降趋势,且可以通过0.001的显著性检验;气候倾向率分别为-1.74和-1.07 d/10 a。利用滑动t检验法发现春季及其代表月4月份的降水日数均发生了均值突变,突变年份分别在1973和1977年。Provided with daily precipitation of 49 stations in Henan Province from 1957 to 2005, the trend of rainday in the spring and April is analyzed. The results showed that the rain day had a distinct decreasing trend,which could pass the significance test at 0. 001 confidence level,and mean climatic tendency was -1.74 d/10 a and -1.07 d/10 a respectively. By using the moving t-test technique, the abrupt change points of spring and April rainday during recent 50 years were discussed. It showed that the abrupt change points of spring and April were 1973 and 1977 respectively. Furthermore,the current variation of rainday was still in the decreasing period.

关 键 词：降水 气候变化 春季 河南 

分 类 号：S762.31[农业科学—森林保护学] P467[农业科学—林学]