کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5429135 | 1397336 | 2012 | 6 صفحه PDF | دانلود رایگان |
The single scattering albedo Ï0λ in atmospheric radiative transfer is the ratio of the scattering coefficient to the extinction coefficient. For cloud water droplets both the scattering and absorption coefficients, thus the single scattering albedo, are functions of wavelength λ and droplet size r. This note shows that for water droplets at weakly absorbing wavelengths, the ratio Ï0λ(r)/Ï0λ(r0) of two single scattering albedo spectra is a linear function of Ï0λ(r). The slope and intercept of the linear function are wavelength independent and sum to unity. This relationship allows for a representation of any single scattering albedo spectrum Ï0λ(r) via one known spectrum Ï0λ(r0). We provide a simple physical explanation of the discovered relationship. Similar linear relationships were found for the single scattering albedo spectra of non-spherical ice crystals.
⺠Spectral invariant relationship between single scattering albedo spectra was found. ⺠This relationship was physically explained for water droplets. ⺠Similar relationships were also found for irregular ice crystals.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 113, Issue 9, June 2012, Pages 715-720