【摘要】 利用2005年7月—2006年10月在山东禹城对太阳辐射(包括光合有效辐射PAR、可见光辐射VIS、总辐射Q等)、气象要素等进行的4次综合观测资料,初步得到了PAR,VIS的日、季节变化特征并对其进行了分析,结果表明:各辐射的小时累计之比VIS/Q,PAR/Q,PAR/VIS相对稳定,其平均值分别为0.39,1.95(mol/MJ),4.97(mol/MJ),但它们均有明显的日、逐日、季节变化,并受水汽、气溶胶、云等因素的影响。同时建立了实际天气PAR,VIS的小时累计经验公式及其转换关系,计算值与观测值均比较接近。当考虑水汽和散射因子时,PAR,VIS的计算值与观测值的相对偏差分别为11.1%,10.6%。限于实际情况,可以只考虑水汽因子的作用来计算PAR和VIS的小时累计值,它们的相对偏差分别为13.3%,12.6%。水汽因子对于PAR,VIS的传输和计算具有重要作用。更多还原

【Abstract】 4 times integrated observations were made of solar radiation (including photosynthetically active radiation (PAR),visible radiation (VIS),global radiation (Q),and etc.),meteorological parameters at Yucheng during July 2005 to October,2006. The characteristics of daily and seasonal variation of PAR and VIS were obtained,the ratios of hourly sum of VIS to Q,PAR to Q,PAR to VIS were relatively stable,their averages were 0.39,1.95 (mol/MJ),4.97 (mol/MJ),respectively. These ratios displayed obvious diurnal,daily and seasonal variations,and were influenced by water vapor,aerosol,clouds and etc. The empirical formulas were built up for calculating hourly sums of PAR and VIS,and their relationship under actual sky conditions. The calculated PAR and VIS were in good agreements with that measured,and their relative biases were 11.1% and 10.6%,respectively,when water vapor and scattering factor were considered. Considering the actual condition,when only water vapor factor was considered,the relative biases were 13.3% and 12.6%,respectively. Water vapor factor plays an important role in the transmission and calculation of PAR and VIS.更多还原