摘要
2005年9月11日至2006年9月2日,在河北省兴隆县对太阳辐射(光合有效辐射SPAR、可见光辐射SVIS、总辐射Q等)、气象参数进行了4次综合观测,初步得到了SPAR、SVIS等的变化特征。小时累计之比SPAR/Q、SVIS/Q、SPAR/SVIS相对稳定,其平均值分别为2.03 mol/MJ、0.42、4.89 mol/MJ,同时它们都表现出明显的日、逐日、季节变化特征,并受到水汽、气溶胶、云等因素的影响。建立了实际天气计算SPAR、SVIS的经验公式及SPAR与SVIS转换关系式,计算值与观测值符合得较好。在考虑水汽和散射因子时,SPAR、SVIS计算值与观测值的相对偏差分别为13.3%、12.1%。限于实际情况,也可以只考虑水汽因子,此时,SPAR和SVIS的相对偏差分别为13.8%、12.4%。对于SPAR、SVIS的传输和计算来说,水汽因子具有重要作用,气溶胶因子的作用虽弱于水汽因子,但仍需考虑。
Integrated observations were made of the solar radiation, including photosynthetically active radiation （PAR）, visible radiation （VIS）, global radiation （Q）, etc, and meteorological parameters at Xinglong, Hebei Province, from 11 September 2005 to 2 September 2006. The variation characteristics of PAR and VIS were obtained. The results show that the ratios of hourly sum of PAR to Q, VIS to Q, and PAR to VIS are relatively stable, and their averages are 2.03 （mol/MJ）, 0.42 and 4.89 （mol/MJ）, respectively, which indicate the obvious diurnal, daily and seasonal variations, being influenced by water vapor, aerosol, clouds, etc. The empirical formulas under all sky conditions for calculating the hourly sums of PAR and VIS, and the conversion relationship between hourly sums of PAR and VIS are built. The calculated PAR and VIS are in good agreement with the measured, and their relative biases are 13.3% and 12. 1%, respectively, when the water vapor and scattering factor are considered. Concerning the actual condition, when only water vapor factor was considered, their relative biases are 13. 8% and 12.4%, respectively. In view of the transmission and calculation of PAR and VIS, the water vapor factor plays an important role, and the role of aerosol is not as important as water vapor, but it should still be considered.
出处
《气象科技》
北大核心
2009年第4期472-477,519,共7页
Meteorological Science and Technology
基金
中国科学院野外台站研究基金项目资助
关键词
太阳辐射
光合有效辐射
可见光辐射
水汽
散射因子
solar radiation, photosynthetically active radiation, visible radiation, water vapor, scattering factor
