摘要
文章利用统计学法观察雅安地区国家气象观测站1991—2020年期间年季降水量、年平均暴雨日数、年平均夜雨率,分析雅安地区近30年来降水的差异性特征。结果表明:近30年雅安地区年降水量变化波动较大、南北差异较大,中部年季降水量偏大,属湿润气候,年暴雨日数雨城和天全略有减少,名山、芦山、荥经略有增加,年平均夜雨日数最多,最高值为天全193.9d;北部年季降水量偏少,年暴雨日数略有增加,年平均夜雨日居中为149.3d;南部年季降水量最少,属干暖气候,年暴雨日数汉源略有减少,石棉略有增加,年平均夜雨日最少,最少值为汉源39.7d。
Using statistical method,the annual seasonal precipitation,annual average rainstorm days and annual average night rain rate of the National Meteorological Observation Station in Ya’an region during the period of 1991-2020 were analyzed to analyze the difference characteristics of precipitation in Ya’an region in the past 30 years.The results show that the annual precipitation in Ya’an hasfluctuated greatly in the past 30 years,and the difference between the north and the south is large.The annual seasonal precipitation in the central part is relatively large,belonging to a humid climate.The number of annual rainstorm days in Yucheng and Tianquan has decreased slightly,while the number of Mingshan,Lushan and Yingjing has increased slightly.The annual average number of night rain days is the largest,with the highest value of 193.9 days in Tianquan;The annual seasonal precipitation in the north is relatively small,the annual number of rainstorm days is slightly increased,and the annual average night rain days is 149.3d;The annual precipitation in the south is the least,belonging to dry and warm climate.The annual number of rainstorm days in Hanyuan is slightly reduced,while asbestos is slightly increased.The annual average night rain days are the least,with the minimum value of 39.7 days in Hanyuan.
作者
李尚锦
周学云
高文良
胡瑶
LI Shangjin;ZHOU Xueyun;GAO Wenliang;HU Yao(Sichuan Ya’an Meteorological Bureau,Ya’an 625000,China)
基金
2021年雅安市气象局气象科研基金项目“雅安市气候资源利用与开发研究”(202111)。
关键词
统计学法
雅安地区
降水差异
线性回归
statistical method
Ya’an region
precipitation difference
linear regression
