Abstract
One of the important applications of lidar techniques is the study of thermal regime and aerosol content of the stratosphere. Such investigations in monitoring mode were started at the Institute of atmospheric optics since 1994 and are continued to date. The main attention is paid for the study of the unexpected disturbances caused by winter stratospheric warming. In this paper we present the results of the study of the vertical distribution of temperature and aerosol over Tomsk of last years.
Highlights
The period of 2015-16, which presents the results was characterized by the absence of volcanic eruptions which could affect the disturbance of the aerosol component of the stratosphere of the northern hemisphere including western Siberian region
The following analysis has shown that distortions of the aerosol component were caused by the appearance of polar stratospheric clouds (PSCs)
Our synchronous lidar measurements of temperature discovered the abnormally low temperature values in the lower stratosphere, which caused the formation of PSCs
Summary
The period of 2015-16, which presents the results was characterized by the absence of volcanic eruptions which could affect the disturbance of the aerosol component of the stratosphere of the northern hemisphere including western Siberian region. It was a convenient possibility to observe the peculiarities of the temporal variability of the background aerosol loading of the stratosphere over Western Siberia during quite long time interval. In this period, as in previous years [15], winter stratospheric warming's were observed. The represented data array of 161 total signals collected in some nights was used as initial data for analysis in 2015-16.The height interval was from 15 till 50-60 km, the spatial resolution was 192 m. Lidar signals were received in the photopulses counting mode with accumulation of 12×104 laser pulses (accumulation time was about 2 hours during a night)
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