On effectiveness of lidar differential absorption methods under conditions of cloudy atmosphere

G. M. Krekov; M. M. Krekova

doi:10.1117/12.675872

21 April 2006 On effectiveness of lidar differential absorption methods under conditions of cloudy atmosphere

G. M. Krekov, M. M. Krekova

Proceedings Volume 6160, Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; 616029 (2006) https://doi.org/10.1117/12.675872
Event: Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2005, Tomsk, Russian Federation

Abstract

Reducing of systematic errors in lidar measurements caused by differential extinction and backscattering by aerosol and cloud particles is a key problem in determination of the ozone concentration in the atmosphere. Comparative analysis of the effectiveness of different algorithms of the method of differential absorption (MDA) has been carried out in the frameworks of the method of statistical tests for the cases of elastic and inelastic scattering. They include the canonical MDA technique, in which the ozone concentration profile is calculated using the ratio of two signals measured at the "on" and "off" wavelengths in the vicinity of the absorption band. The peculiarities of the classic Raman and new rotation rotation-vibration methods are considered. It is shown that the presence of multiple scattering depending on the wavelength and differential absorption by cloud droplets are the main sources of systematic errors in measuring the ozone concentration. It dictates the necessity of correction.

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G. M. Krekov and M. M. Krekova "On effectiveness of lidar differential absorption methods under conditions of cloudy atmosphere", Proc. SPIE 6160, Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 616029 (21 April 2006); https://doi.org/10.1117/12.675872

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KEYWORDS

LIDAR

Ozone

Scattering

Absorption

Aerosols

Multiple scattering

Atmospheric particles

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