Formation and consequences of winter temperature inversions in the atmosphere of Krasnoyarsk
N.Ya. Shaparev1,2, A.V. Tokarev1,2, O.E. Yakubailik1,2
1Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, Institute of Computational Modelling SB RAS, Krasnoyarsk, Russia
2Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, Krasnoyarsk, Russia
Keywords: atmospheric monitoring, weather conditions, temperature inversion, PM2.5, terrain, Krasnoyarsk
Abstract
The problem of atmospheric air pollution by fine particulate matter (PM2.5) in large industrial centers during winter is one of the most acute environmental threats affecting the life expectancy and quality of life of population. The study examines the processes of temperature inversion layer formation and its impact on atmospheric PM2.5 in Krasnoyarsk during the winter months of 2022-2024 based on data from a monitoring network, which measures air temperature, atmospheric pressure, wind speed and direction, PM2.5 concentration, and cloud cover, and data from an MTP-5 profiler, which determines the vertical distribution of atmospheric temperature. The multi-hour and multi-day regimes of radiation and advective inversions are analyzed. The necessary and sufficient conditions for their occurrence are established. The statistical dependences of PM2.5 concentration on the category and intensity of inversions are derived. The results can be used in short-term forecasting of temperature inversions and the associated periods of high PM2.5 air pollution in the city of Krasnoyarsk.
|
