Changes in the middle and upper atmosphere parameters during the January 2013 sudden stratospheric warming

We present the results of complex obser-vations of various parameters of the middle and upper atmosphere over Siberia in December 2012 – January 2013, during a major sudden stratospheric warming (SSW) event. We analyze variations in ozone concentration from microwave measurements, in stratosphere and lower mesosphere temperatures from lidar and satellite measurements, in the F2-layer critical frequency (foF2), in the total electron content (TEC), as well as in the ratio of concentrations of atomic oxygen to molecular nitrogen (O/N2) in the thermosphere. To interpret the observed disturbances in the upper atmosphere, the experimental measurements are compared with the results of model calculations obtained with the Global Self-consistent Model of Thermosphere—Ionosphere—Protonosphere (GSM TIP). The response of the upper atmosphere to the SSW event is shown to be a decrease in foF2 and TEC during the evolution of the warming event and a prolonged increase in O/N2, foF2, and TEC after the SSW maximum. For the first time, we observe the relation between the increase in stratospheric ozone, thermospheric O/N2, and ionospheric electron density for a fairly long time (up to 20 days) after the SSW maximum at midlatitudes

Studying the Variations in Aerosol Loading and Thermal Regime of the Stratosphere Over Tomsk on the Basis of Lidar Monitoring

One of the important applications of lidar techniques is the study of aerosol content and thermal regime of the stratosphere. Such investigations in monitoring mode were initiated at the Institute of Atmospheric Optics since 1986 (for aerosol) and 1994 (for temperature), and are continued to the present. The main attention is paid to studying the annual variations in aerosol content in the stratosphere and sudden disturbances caused by winter stratospheric warming. In this paper we present the results of studying the aerosol content and its vertical stratification and vertical distribution of temperature in the stratosphere over Tomsk for the last three years

Studying the Variations in Aerosol Loading and Thermal Regime of the Stratosphere Over Tomsk on the Basis of Lidar Monitoring

One of the important applications of lidar techniques is the study of aerosol content and thermal regime of the stratosphere. Such investigations in monitoring mode were initiated at the Institute of Atmospheric Optics since 1986 (for aerosol) and 1994 (for temperature), and are continued to the present. The main attention is paid to studying the annual variations in aerosol content in the stratosphere and sudden disturbances caused by winter stratospheric warming. In this paper we present the results of studying the aerosol content and its vertical stratification and vertical distribution of temperature in the stratosphere over Tomsk for the last three years

Results of an Experiment on Joint Lidar and Balloon Sounding of the Troposphere and Stratosphere

The current problem of climate change requires studying changes in the composition and properties of the atmosphere, affecting its radiation balance. Obtaining knowledge in this direction is possible through regular measurements of climate-forming components and atmospheric characteristics and their subsequent analysis. There are contact and remote methods and means of sensing the atmosphere at its different altitude levels, including aerological, aircraft, satellite, lidar and rocket. This paper proposes a technology for monitoring the aerosol component based on remote (lidar) and contact (aerological) optical sounding. The results of simultaneous remote (lidar) and direct (sonde) measurements of the vertical distribution of aerosol loading in the troposphere and stratosphere, carried out on January 27-30, 2022 and March 15-16, 2023 in Tomsk, are presented. The purpose of the experiment was to conduct joint lidarballoon measurements and validate aerosol backscatter profiles in the upper troposphere and stratosphere to create an all-weather lidar-balloon monitoring system of spatiotemporal and microphysical characteristics of aerosol. Good agreement is demonstrated in the obtained vertical profiles of the value of the backscatter ratio R(H) for close wavelengths (528 and 532 nm for the aerosol backscatter sonde and lidar, respectively). To restore the microphysical parameters of an aerosol during joint lidar-balloon experiments, the possibility of expanding 2-wave (355 and 532 nm) lidar measurements with an additional set of wavelengths (470, 850, 940 nm) using an optical balloon aerosol sonde was shown