tailieunhanh - Short-Wave Solar Radiation in the Earth’s Atmosphere Part 8

Những hạn chế chủ yếu được đưa vào không gian đồng nhất và ổn định thời gian của các lĩnh vực điện toán đám mây. Nó sẽ được chỉ ra rằng việc giải thích của các quan sát bức xạ dựa trên lý thuyết truyền bức xạ đơn sắc có sẵn với các phép đo quang phổ chỉ. | 214 Analytical Method of Inverse Problem Solution for Cloudy Atmospheres suitable for applying the approach developed here. The principal restrictions are put on space homogeneity and the temporal stability of cloud fields. It should be pointed out that the interpretation of the radiation observations based on the monochromatic radiative transfer theory is available with the spectral measurements only. Applying the methodology to the observational data of total radiation needs the special analysis of uncertainties appearing while integrating the formulas over wavelength. The values and functions in the asymptotic formulas of the radiative transfer theory depend on single scattering albedo and optical thickness which in their turn are greatly varying with wavelength. Regretfully this fact is neither mentioned nor analyzed in the many studies dealing with the observational data of total radiation. The data of both the radiance and irradiance observations could be used for retrieval of the optical parameters. Interpretation of the irradiance data needs no high azimuthal harmonics of reflected radiances and the calculating errors of these harmonics neither included to the result. The reflected and transmitted solar irradiance for the optically thick and weakly absorbing cloud layer are described by formulas . Consider these expressions for two values of cosine of the incident solar angle P0 1 p0j2 corresponding to the observations accomplished at two moments. The expressions for parameter s2 and for scaled optical thickness T 3t0 1 g are easy to derive taking the ratios of the reflected transmitted irradiances for two different values of the cosine of the incident solar angle as has been shown in Melnikova and Domnin 1997 and Melnikova et al. 1998 2000 . Here they are - for the reflected irradiance a ụo 1 Fỉ K0 ụo 2 1 2 _ _ a po 2 -F Ko po 1 _ n2 w po 1 w po 2 t Tln 2s mnlK po i where function w p is defined with for function K2 p and subscript i .