Aerosol Parameters of Middle Atmosphere Measured by Two-Wavelength Lidar Sensing and Their Comparison with Radio Meteor Echo Measurements

摘要

Aerosol lidar sensing of the middle atmosphere (30-65 km) was carried out in Obninsk over a year. The sensing at two wavelengths of 355 and 532 nm enabled the separation of Rayleigh and aerosol scattering contributions in lidar signals. Increased aerosol content is found within the 60-65 km altitude range. Monthly average lidar sensing data are compared with measurements of the radio meteor echo in Obninsk and Kollm (Germany). The correspondence between the time variations in the data of two types is revealed, which indicates the meteor origin of the aerosol. Possible physical causes of the appearance of the aerosol layer observed are discussed.