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Optical Characteristics of Aerosol and Carbon Monoxide Content in the Atmosphere over Irkutsk Oblast and Buryatia in 2010–2021

  • USE OF SPACE INFORMATION ABOUT THE EARTH ENVIRONMENTAL STUDIES BASED ON SPACE DATA
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Abstract

Seasonal and interannual variations of the aerosol optical depth (AOD) and the total carbon monoxide content in the atmospheric column have been determined by measurements of the MODIS and Measurements of Pollution in the Troposphere (MOPITT) instruments of the Terra satellite for several cities of Irkutsk oblast and Buryatia with a high level of atmospheric pollution for 2010–2021. For Irkutsk, a decrease in AOD interannual value from 0.278 in 2012 to 0.14 in 2020 with a general negative trend is shown. However, in 2021, the interannual AOD value for Irkutsk increased to 0.22. For Irkutsk, a negative trend of interannual variations in the total CO content in the atmospheric column is shown. When comparing the long-term seasonal variations of AOD according to ground measurements by a CIMEL photometer in Tory (Buryatia) and the OMI/Aura satellite data, the proximity of AOD values for the summer and autumn seasons and a significant excess of AOD according to satellite data over ground measurements for the spring months are shown. The largest Spearman correlation coefficient between ground and satellite measurements of AOD was for 2021 (ρs = 0.64).

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Funding

This work was carried out within the framework of the state task of the Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, on the topic “Space.”

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  1. Institute of Radioengineering and Electronics, Russian Academy of Sciences, Fryazino, Moscow oblast, Russia

    N. V. Rodionova

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Correspondence to N. V. Rodionova.

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Rodionova, N.V. Optical Characteristics of Aerosol and Carbon Monoxide Content in the Atmosphere over Irkutsk Oblast and Buryatia in 2010–2021. Izv. Atmos. Ocean. Phys. 59, 1103–1114 (2023). https://doi.org/10.1134/S0001433823090165

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