Coarse aerosol and its role in shaping the height of the homogeneous aerosol atmosphere
V.N. Uzhegov, Yu.A. Pkhalagov, D.M. Kabanov, S.M. Sakerin
Keywords: спектральная прозрачность приземной атмосферы, коэффициент аэрозольного ослабления, аэрозольная оптическая толща атмосферы, высота однородной аэрозольной атмосферы, spectral transparency of the terrestrial atmosphere, the ratio of aerosol extinction, aerosol optical thickness of the atmosphere, the height of the homogeneous aerosol atmosphere
Abstract
Large array of simultaneous measurements of spectral aerosol extinction coefficients b(l) (surface layer) and the aerosol optical thickness t
а(l) of the atmosphere in the range l = 0,45¸3,9 μm is analyzed. In many cases, situations revealed, where the height of the homogeneous aerosol atmosphere Н
0(l) = t
а(l)/b(l) increases with increasing wavelength in the infrared region of the spectrum. It is suggested that such anomalous spectral dependence of the H
0(l) is associated with the presence in the boundary layer of clear atmosphere of the visually indistinguishable coarse aerosol of different nature (soil or liquid-drop). It is shown that for detection of such aerosol in the cloud-free atmosphere it is necessary to perform simultaneous measurement of b(l) and t
а(l) at wavelength l > 2 μm.
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