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2005年7月19日-2006年9月30日,在河北栾城对太阳辐射包括光合有效辐射QPAR、可见光辐射QVIS、总辐射Q等气象参数开展了4次综合观测,初步得到了QPAR、QVIS等的变化特征。观测表明,小时累计之比QPAR/Q、QVIS/Q、QPAR/QVIS相对稳定,其平均值分别为1.94mol.MJ-1、0.39、4.95mol.MJ-1,同时它们均表现出明显的日、逐日、季节变化特征,并受到水汽、气溶胶、云等因素的影响。建立了计算实际天气QPAR、QVIS小时累计的经验公式及QPAR与QVIS转换关系式,计算值与观测值均吻合较好。在考虑水汽和散射因子时,QPAR、QVIS计算值与观测值的相对偏差分别为14.4%、13.9%;限于资料缺乏,也可仅考虑水汽因子的作用,此时QPAR、QVIS的相对偏差分别为15.2%、14.2%。利用比值法计算QPAR、QVIS时,水汽因子具有重要作用,气溶胶因子的作用远弱于水汽因子,但仍需要考虑。
From July 19, 2005 to September 30, 2006, four comprehensive observations of solar radiation including QPAR, QVIS and Q were carried out in Luancheng, Hebei Province, and QPAR, QVIS And so on the changing characteristics. Observations showed that the ratios of hourly cumulative QPAR / Q, QVIS / Q and QPAR / QVIS were relatively stable with average values of 1.94mol.MJ-1, 0.399 and 4.95mol.MJ-1, respectively, and they all showed obvious days , Day by day, seasonal variations, and affected by water vapor, aerosols, clouds and other factors. The empirical formula for calculating the actual weather QPAR and QVIS hours and the QPAR and QVIS conversion formulas are established. The calculated and observed values are in good agreement. When the water vapor and the scattering factor are taken into consideration, the relative deviations of the QPAR and QVIS values are 14.4% and 13.9%, respectively. Due to lack of data, only the water vapor factor can be considered. The relative deviations of QPAR and QVIS are 15.2%, 14.2%. When calculating the QPAR and QVIS using the ratio method, the water vapor factor plays an important role. The effect of the aerosol factor is far weaker than the water vapor factor, but it still needs to be considered.