摘要
用5年滑动平均方法并用最小二乘法建立方程式,计算太阳辐射气候倾向率及日照气候倾向反映太阳辐射的45a变化趋势,用小波分析方法分析太阳总辐射的周期变化规律。结果表明,太原地区的年日照时数减少,年总辐射量呈显著减少趋势,有11a的周期变化,在1981年左右有突变。初步统计能见度低于10km次数在逐年增多。
By using the 5 - piont running average and the least square method, the trends of solar radiation and duration of sunlight are calculated. At the same time, the periodic change of solar radiation is analyzed by wavelete method. The results show that the duration of sunlight as well as annual solar radiation decrease. The periods is 11a and there is a jump about 1981. In addition the frequency of visibility less than 10km increases based on the primary results.
出处
《山西气象》
2006年第3期18-19,24,共3页
Shanxi Meteorological Quarterly
关键词
太阳总辐射
周期与季节变化
日照时数
成因初步分析
Solar Radiation
Periodic and Seasonal Variation
Duration of Sunlight
Primary Analysis of Cause
