In this work, long observation time series of the integrated aerosol backscattering coefficient, obtained at the Siberian Lidar Station in Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, Tomsk were used to show that the stratospheric aerosol starts growing at a rate of 1.08 ∙ 10−3 sr-1 per decade after 2018. Comparison of the seasonal regional empirical model of background stratospheric aerosol for 2000-2018 and seasonal average profiles for 2018-2023 showed a significant increase in stratospheric aerosol throughout the stratosphere over the last five-year period; the maximal deviations of the scattering ratio reached 0.1 for summer and 0.2 for winter in the lower stratosphere. It is hypothesized that the aerosol in the stratosphere could increase due to the global effect of explosive eruptions of the volcanoes Raikoke in June 2019 and the submarine volcano Hunga Tonga-Hunga Ha’apai in January 2022.
Within the Russian Science Foundation (RSF) project 21-79-10051 we developed a mobile lidar system for monitoring of tropospheric ozone and aerosol at the sensing wavelengths 299/341 nm. The lidar system is created on the basis of the QX 500 laser (“SOLAR LS”, Belarus) and Cassegrain telescope with receiving mirror diameter of 0.35 m and focal length of 0.7 m. Balancing and commissioning of laser source are carried out. Tests of receiving-transmitting lidar channel showed that the mobile lidar can cover the altitude range from ~0.1 to 12 km.
In this report we present and generalize the results from lidar measurements of the vertical distribution of the stratospheric aerosol layer at the Siberian Lidar Station in 2021. The description and technique of the stratospheric measurements at multichannel stationary lidar complex in Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, Tomsk are presented. Based on the measurements and analysis of the data obtained, we confirm the regularity of increasing accumulation of background aerosol in the period of fall – winter, followed by its active depletion in summer period.
At the Siberian Lidar Station in V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences in Tomsk (56.5 N, 85.0 E), a lidar is operated to measure the ozone vertical distribution in the upper tropospherelower stratosphere, to study the ozone dynamics in the tropopause region, and to investigate the stratosphere-troposphere exchange. In this work, we compare R7207-01 PMT, operated on this lidar jointly with amplifiers-discriminators C3866 of HAMAMATSU firm for signal recording, against H12386-210 PMT units at the wavelength pair of 299/341 nm. It is shown that the new H12386-210 PMT units are promising for ozone sensing at the wavelength pair of 299/341 nm.
We have started using the Suomi satellite data since 2021. In this report, we present an example of comparing lidar and satellite measurements of the vertical distribution of ozone concentration in the upper troposphere – stratosphere, obtained using measurements at differential absorption lidar complex and data from Aura, MetOp, and Suomi satellites. The ozone vertical distribution was retrieved using the vertical temperature distribution according to the data from MetOp meteorological satellite. The spatiotemporal discrepancies are found between measurements at Siberian Lidar Station (SLS) and on Suomi satellite. Figure 1 shows the block diagram of the SLS complex.
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