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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, 2024, Vol. 21, No. 2, pp. 315-324

Seasonal variations in the atmospheric constituents in the Baikal region from Aura MLS satellite observations

I.V. Medvedeva 1, 2 , A.V. Tatarnikov 1 , I.K. Edemskiy 1 , A.V. Saunkin 1 
1 Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russia
2 A.M. Obukhov Institute of Atmospheric Physics RAS, Moscow, Russia
Accepted: 27.02.2024
DOI: 10.21046/2070-7401-2024-21-2-315-324
Based on the Aura MLS (Microwave Limb Sounder) satellite data, seasonal variations in the concentrations of the CO and H2O atmospheric constituents in the Baikal region were studied. For the analysis, we used satellite data on the vertical profiles of the CO and H2O concentrations for 2010–2021, from the MLS aboard the EOS (Earth Observing System) Aura spacecraft. We analyzed the data at the stratospheric heights for the pressure levels within 215–10 hPa for the locations of Khorinsk (52.17° N, 109.77° E) and Zhigalovo (54.81° N, 105.15° E) for the period 2010–2021. In the analyzed altitude range, the data on CO concentration are presented for 9 pressure levels, on H2O concentration — for 17 pressure levels. Average seasonal changes in the concentrations of the analyzed components were calculated for each pressure level in the range of 215.4–10 hPa (~11–32 km) in daytime and nighttime conditions for the period 2010–2020. Comparison of the obtained results with the variations in the concentrations of atmospheric constituents in 2021 revealed an increased CO concentration for Khorinsk in July – August 2021, when increased smoke from forest fires was observed in the analyzed region.
Keywords: satellite monitoring, atmospheric constituents, CO, H2O, seasonal variations, stratosphere, fires
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