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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2023, Vol. 20, No. 2, pp. 229-237

Stratospheric aerosol over the region of Kazakhstan according to Suomi NPP satellite observations

R.Yu. Lukianova 1 
1 Space Research Institute RAS, Moscow, Russia
Accepted: 16.03.2023
DOI: 10.21046/2070-7401-2023-20-2-229-237
The evolution of stratospheric aerosol over the region of Kazakhstan in 2012–2021 is considered based on vertical profiles obtained with the Suomi NPP limb sounder. An analysis of the variability of the daily averaged extinction coefficients showed that the background state of the stratospheric aerosol load, which had been established after 2012, was disturbed by the appearance in the summer of 2017 of a short-lived, and in the summer of 2019, a long-lived layer of increased density. Formation of the layers may be related to the long-distance transport of combustion products by high-altitude jet streams during boreal fires. The appearance of the layer in year 2017 may be associated with a narrow high-altitude jet stream, through which the intercontinental transfer of the soot product formed during boreal fires in North America was carried out. However, the layer found over Kazakhstan consisted of large particles that are unlikely to be transported over long distances. The relatively thick layer of finely dispersed aerosol, which formed in July 2019, was observed till the next summer. This layer was clearly formed from the combustion products that rose into the lower stratosphere during the Siberian fires and spread to Kazakhstan through the initial rapid transport to the Arctic and subsequent meridional transport to the south. In general, the background level of stratospheric aerosol in the region after year 2017 increased 1.5–2 times compared to the beginning of the observation period.
Keywords: stratosphere, aerosol, satellite observations, vertical profile, long-distance transport
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