Ecological Systems and Devices Annotation << Back Modeling of Spectral Measurements of Water Vapor Concentration and Moisture Content in the Surface Layer of the Atmosphere for Forecasting Hazardous Natural Phenomena Grigorievsky V.I., Kalenov D.S., Stepushkin M.V., Sadovnikov V.P., Tezadov Y.A., Elbakidze A.V. Spectral measurements of atmospheric water vapor concentration in the range of 1650 nm in the presence of solar radiation were carried out. When processing the results of measurements carried out on single water absorption lines with a spectral resolution of 0.1 nm, a systematic deviation of the data from the data obtained from direct meteorological measurements near the Earth's surface during periods of dry and hot weather was revealed. A possible reason for the discrepancy between the spectral and meteorological measurements is the difference in the stratification of water vapor in the atmosphere from the standard during periods of hot and dry weather. A model refi nement of the stratification of water vapor during such periods of dry weather was carried out. The proposed technique allows for both long-term monitoring of the concentration and moisture content in the atmosphere and obtaining operational information in real time, including from sun-synchronous satellite orbits. Keywords: atmosphere, moisture content, concentration, water vapor, systematic error, spectrum. DOI: 10.25791/esip.9.2025.1542 Pp. 03-11.