Abstract:

Based on observation data of daily solar radiation of Yinchuan station during 1981 - 1985, alongwith linear relationship between observation values of solar radiation and extraterrestrial radiation, sunshine duration and daylength, the regional coefficient as was obtained, and sensitivity testwas done to the values of bs , finally the best values of as = 0. 3, bs = 0. 5 was obtained to estimate regional solar radiation. In the light of the regional coefficients and calculation formula of solar radiation, the daily solar radiation in the year of 1986 and 1987 at Yinchuan station was estimated, and comparison was done between estimated values and observation data. Results show the correlation coefficient R2 was 0. 94, which validated the reliability of regional coefficients. The daily solar radiation at Yongning station was estimated using the related formula of solar radiation and regional coefficients during 1989 - 2000, and compared with observation data of Yinchuan station. Results show that there were good linear relationship between them, and the minimum of R² was 0. 88 in twelve years.

Key words: regional coefficient, daily solar radiation, extraterrestrial radiation, sunshine duration, daylength

摘要：

利用银川站过去5 a的太阳日辐射观测资料(1981～1985)与大气外太阳辐射、日照时数、日照长度间的相关关系,确定了区域系数as。通过对bs 的取值进行敏感测试,可得到一组最佳推算太阳辐射通量的区域系数: as = 0. 3, bs = 0. 5。用此系数和太阳日辐射通量计算公式,推算了银川站1986、1987年太阳日辐射通量并用观测值进行验证,结果表明:两者之间有很好的线性相关, R2 = 0.94,验证了区域系数的可信度。通过对银川站2 a (1986, 1987)资料的平均误差、平均偏差、平均绝对偏差和均方根偏差的计算表明,结果与国内相关报道基本一致。对宁夏永宁站1989～2000年的太阳日辐射通量用区域系数进行估算,并与银川站的实际观测资料比较,结果显示永宁站太阳日辐射通量估算值和银川站实测值间有很好的线性关系, 12 a间的方差最小值R² = 0. 88。

关键词: 区域系数, 太阳日辐射通量, 外空间辐射通量, 日照时数, 日照长度