Studying atmospheric and ionospheric variabilities associated with sudden stratospheric warmings

Irina Medvedeva; Konstantin Ratovsky

doi:10.1117/12.2575552

12 November 2020 Studying atmospheric and ionospheric variabilities associated with sudden stratospheric warmings

Irina Medvedeva, Konstantin Ratovsky

Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 115608M (2020) https://doi.org/10.1117/12.2575552
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

We present the results of studying the effects of major winter sudden stratospheric warmings (SSW) in February 2018 and January 2019 in the upper atmosphere over Eastern Siberia. The study was carried out using experimental data on the rotational temperature of the hydroxyl molecule and on the peak electron density NmF2. It was found, that during the SSW periods, a significant increase in the manifestation of the activity of atmospheric waves of different time scales at the heights of the mesopause and the F2-region of the ionosphere was observed, but its nature was different. Thus, the main effect of the major SSW 2018 at the heights of the mesopause and ionospheric F2-region, was in the intensifying the day-to-day variability of the mesopause temperature and NmF2 due to the activity of planetary waves. The most significant effects of the SSW 2019 at the heights of the mesopause were an increase in diurnal temperature variability due to activities of tides and internal gravity waves. In the F2 region of the ionosphere, it was revealed an intensification of the NmF2 day-to-day variability, which may be due to the influence of planetary waves. The observed effects can be caused by intensification of the atmospheric wave activity due to the SSWs.

Citation Download Citation

Irina Medvedeva and Konstantin Ratovsky "Studying atmospheric and ionospheric variabilities associated with sudden stratospheric warmings", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 115608M (12 November 2020); https://doi.org/10.1117/12.2575552

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