Integrated satellite and groundbased regional monitoring of atmospheric aerosol by lidar and radiometric systems using data assimilation

Heading: 
Space and Atmospheric Physics
1Miatselskaya, NS, Bril, AI, 1Chaikovsky, AP, 1Fedarenka, AS, 2Milinevsky, GP
1B.I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk, Belarus
2Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Space Sci. & Technol. 2020, 26 ;(1):59-71
https://doi.org/10.15407/knit2020.01.059
Publication Language: Russian
Abstract: 
The data processing algorithm for combined ground-based measurements by lidars and radiometers is modified for complex data processing of ground-based radiometers and the space lidar. This allows one to expand the scope of the lidar-radiometric sensing method. In the present work, collocated measurements by AERONET network radiometers and CALIOP/CALIPSO space lidar were used for complex data processing. The CALIOP lidar backscatter signals were averaged over a sample of individual lidar measurements on a segment of the satellite trajectory in the vicinity of the AERONET station. The length of the segment was approximately 100...200 km, which corresponds to samples of 300...600 measurements. This makes it possible to reduce the contribution of noise to the CALIOP signals significantly. To validate this approach, an integrated LRS experiment was conducted, in which collocated ground-based multi-wave lidar measurements, CALIOP lidar measurements, and AERONET radiometric measurements were used. For further expansion of the lidar-radiometric sensing method scope, optimal interpolation was implemented using both the observations at the AERONET stations and the simulations by the GEOS-Chem chemical transport model.
Keywords: aerosol, chemical transport model GEOS-Chem, lidar-radiometric sounding, optimal interpolation
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