The use of the linear estimation method in determination of integral parameters of atmospheric aerosol from spectral measurements of its optical depth
A.S. Suvorina, I.A. Veselovskii, M.Yu. Korenskii, A.V. Kolgotin
Prokhorov General Physics Institute, Russian Academy of Sciences, 119991, Moscow, Vavilov Str., 38
Keywords: atmospheric aerosol (aerosols in atmosphere), retrieve of atmospheric aerosol parameters, linear estimation method
Abstract
Linear estimation method is used to determine the integral parameters of atmospheric aerosol, such as volume density and effective radius from the spectra of aerosol optical depth measured by a sun photometer. For approbation of the method, three-month series of optical depth at seven wavelengths for four cites of AERONET network characterized by different aerosol types: urban, biomass burning, desert dust, and marine, were chosen. Comparison of the results with retrievals from standard AERONET algorithm shows a good agreement between two methods. However, linear estimation technique allows retrieving time series of particle parameters from direct sun measurements with a high temporal resolution of about several minutes. This method can be used in the instruments that do not provide angular scanning of sky radiance, e.g., the PFR/GAW sun photometers network.
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