Effect of Aerosols on a Reflected Radiation in the Inhomogeneous Ozone Atmosphere Calculated by Using the “Adding” Method

[摘要] The diffuse reflection radiation from an inhomogeneous plane-parallel planetary atmosphere including ozone and aerosols is computed by using the “adding” method (Takashima, 1974) at wavelengths 0.30μ, 0.32μ and 0.34μ. Deirmendjian modified Gamma function is adopted for their aerosol size distribution (Deirmendjian, 1969). The values of optical thicknesses of atmospheric compositions and vertical distributions are given by Elterman (1968). Computational results show that (1) at λ=0.30μ, where absorption due to Ozone is predominant, intensity of the upwelling radiation increases at most 10 percent in the presence of aerosols when the nadir angle of measurements is within about 60 degrees. (2) At λ=0.34μ, where absorption due to ozone is negligible, it increases up to about 20 percent. In general intensity ratio increases in the presence of aerosols more at λ=0.34μ than at λ=0.30μ, in comparison with that of Rayleigh and ozone mixed atmosphere. (3) The values of the diffusely reflected radiation in terms of aerosols of refractive index m=1.50 is higher than that of 1.35.

[学科分类] 大气科学