Ecological Systems and Devices Annotation << Back CARBON CYCLE MOLECULES CONCENTRATION IN THE ATMOSPHERE MEASUREMENTS BY THE RAMAN LIDAR Е.I. Vedenin, V.V. Dyachenko, V.E. Privalov, V.G. Shemanin The actual problem of the lidar measurements accuracy improving has been considered. A computer simulation of the lidar equation for Raman scattering by the carbon cycle molecules in the atmosphere has been performed. The possibility of the carbon cycle molecules concentration of at the level from 4,1×1015 to 1,0×1025 m–3 measuring by the Raman lidar in the atmosphere at the ranging distances up to 100 m in the synchronous photon counting mode of is estimated. The measurement time range becomes very wide from 36 μs to 401 s at this probing distance, so by selecting the measurement time, it is possible to increase the probing distance of the lowest possible concentration of the studied molecules by the same lidar. It is shown that the dependence of the absolute error of the carbon cycle molecules concentration measuring and its relative error on the ranging distance was determined by the lidar signal measurement error. The results obtained can be applied to the development of new methods for the carbon cycle molecules concentration remote measurements. Keywords: carbon cycle, lidar, molecule, Raman scattering, concentration, ranging distance, laser radiation wavelength, measurement error. DOI: 10.25791/esip.8.2023.1391 Pp. 33-41.