Ecological Systems and Devices Annotation << Back OPTICAL MONITORING OF METHANE IN THE ATMOSPHERE IN DISTRICT OF NORTHEAST MOSCOW REGION V.I. Grigorievsky, V.P. Sadovnikov, A.V. Elbakidze Local path measurements of background methane concentration in the northeast of Moscow Region were carried out using a remote active lidar based on a powerful Raman amplifier of optical radiation in the wavelength of 1650 nm. The radiation power in pulse was about 3 W. The trasses were selected taking into account possible anomalous of the background of atmospheric methane and included forests, gasified buildings with natural gas, a peat lake, the the road with heavy traffic, a livestock farm and solid waste landfi ll. The length of distances ranged from was about 0.6 km to was about 3,15 km. The highest background concentration of observed over a livestock farm, over a highway and a solid waste landfill, which confirms the fact of an increase in gas emissions over these fasilities. Also, higher methane levels were observed above of the gasified homes and the heavy traffic road, indicating a possible increase in the number of vehicles using methane as fuel and a possible leak of natural gas gas from from piepelines supplying buildings with natural gas. Keywords: active lidar, methane, concentration, atmosphere, greenhouse gases. DOI: 10.25791/esip.7.2022.1305 Pp. 03-09.