【作者】 李石； 宋晓巍； 慕臣英； 张菁； 徐全辉； 戴蕾； 张思瑶； 张靖萱；

【Author】 Lishi;Songxiaowei;Muchenying;Zhangjing;Xuqunhui;DaiLei;ZhangSiYao;Shenyang City Meteorological Bureau;Shenyang North New Area Meteorological Administration;

【机构】 沈阳市气象局； 沈阳市沈北新区气象局；

【摘要】 基于沈阳地区7个国家基准站1981-2010年各月日照时数,年总云量、低云量、降水、空气相对湿度资料,采用气候趋势分析法对沈阳地区日照时数气候变化特征和影响因素进行分析。结果表明:沈阳地区年平均日照时数在2390.8-2718.8h之间,多年平均日照时数最多的地区是康平地区,日照时数最少的是沈阳市区,沈阳地区年平均日照时数以-94.62h/10a的速率在减少,夏季日照时数减少最为明显(-29.9h/10a),春季次之(-22.2h/10a)、秋季次之(-16.9h/10a)、日照时数减少速率最慢的为冬季(-12.4h/10a)。沈阳地区日照时数空间变化呈现由北至南逐渐减少的分布特征。通过影响日照时数的要素分析:总云量、低云量、降水量、空气相对湿度与日照存在负相关关系,其中总云量、低云量、空气相对湿度通过99.9%的信度检验。更多还原

【Abstract】 Climate-trend method is used to analyze the characteristics of climatic change and influence factors in the area of Shenyang,which the data about monthly sunshine duration,annual total cloud,annual low cloud,annual precipitation and annual relative humidity of 7 national stations in the area of Shenyang were considered.The results show several verdicts.The annual mean sunshine duration in the area of Shenyang is during 2390.8h to 2718.8h.Kangping is the area which has the maximum annual mean sunshine duration in many years.While the downtown of Shenyang has the minimum one.The annual mean sunshine duration of the area in Shenyang is decreasing at a rate of-94.62h/10 a.In particular,it is the most obvious in the Summer,which the decreasing rate is-29.9h/10 a.The second is in Spring,which the decreasing rate is-22.2h/10 a.The third is in Autumn,which the decreasing rate is-16.9h/10 a.The slowest is in Winter,which the decreasing rate is-12.4h/10 a.The space variation of sunshine duration in the area of Shenyang presents the gradually reduce-distribution characteristic from the north to the south.The factors,which impact the sunshine duration,are analyzed.Total cloud cover,low cloud cover,precipitation and air relative humidity have the negative correlation with sunshine duration.The total cloud cover,low cloud cover and air relative humidity past the reliability test of 99.9%.更多还原