Vol. 35, issue 01, article # 5

Abstract:

The measurements of aerosol backscattering ration in the lower mesosphere by means of sounding at two wavelengths of 355 and 532 nm at lidar stations of Roshydromet from 2012 to 2021 are presented. Appreciable increase in the backscattering ratio R has been observed in the altitude range 50–70 km since 2018. In 2019–2020, the average R attained 1.25 at an altitude of 70 km. The temperature measurements by the Rayleigh method at 532 nm in this period show a positive bias of the temperature of up to +20 K. The two-wavelength temperature measurement method allows one to eliminate this error.

Keywords:

aerosol, mesosphere, backscattering, lidar, solar activity, Rayleigh method for temperature measurements

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