Peculiarities of the diurnal variability of the spectral structure of aerosol extinction of radiation in the wavelength range 0.44 to 1.06 μm on near-ground and slant paths

摘要

A combined data array on diurnal variability of the spectral structure of the aerosol extinction coefficient on near-ground path and the aerosol optical thickness in the wavelength range 0.44 to 1.06 μm obtained in warm seasons 1995-2000 nearby Tomsk is considered. Temporal transformation of the spectral dependence of the effective height of the aerosol atmosphere H_0(λ) in the period since 6 a.m. Till 6 p.m. Is analyzed. It is shown that the characteristics maximum centered at λ = 0.52-0.56 μm is well pronounced in the spectral structure of the parameter H_0(λ) near noon at minimum concentration of fine aerosol. The fact of existence of such a maximum is indirect confirmation of the hypothesis on the determining role of stratospheric intermediately dispersed particles in formation of rarely observed anomalous spectral dependence of the aerosol extinction in shortwave range.