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Abstract <p>Microwave measurements of ozone were performed in the middle atmosphere over Apatity (67° N, 33° E) in winter 2022/2023, during a period of high solar activity in solar cycle 25, with the use of a mobile ozonometer with an operating frequency of 110.8 GHz. The device had a single-sideband noise temperature of 2500 K, which made it possible to measure variations in O<sub>3</sub> in the middle atmosphere with a 15-min resolution. The ozone vertical profiles at altitudes of 22–60 km were retrieved and compared with MLS/Aura satellite vertical profiles of ozone and temperature. The behavior of ozone in February–March 2023 is analyzed. Ozone variations took place during the sudden stratospheric warming (SSW) which occurred in mid-February and was accompanied by an extraordinary increase in the total ozone content (TOC) from 240 to 500 DU. The limits of ozone variations at altitudes of 25, 40, and 60 km are given. The effect of the strong geomagnetic disturbance (storm), which took place on March 23–24, on the daily variations in ozone at an altitude of 60&#xa0;km is discussed.</p>

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Dynamic Phenomena in Stratospheric and Mesospheric Ozone of Polar Atmosphere in February–March 2023

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Yu. Yu. Kulikov,
  • V. I. Demin,
  • V. M. Demkin,
  • A. S. Kirillov,
  • A. V. Losev,
  • V. G. Ryskin

摘要

Abstract

Microwave measurements of ozone were performed in the middle atmosphere over Apatity (67° N, 33° E) in winter 2022/2023, during a period of high solar activity in solar cycle 25, with the use of a mobile ozonometer with an operating frequency of 110.8 GHz. The device had a single-sideband noise temperature of 2500 K, which made it possible to measure variations in O3 in the middle atmosphere with a 15-min resolution. The ozone vertical profiles at altitudes of 22–60 km were retrieved and compared with MLS/Aura satellite vertical profiles of ozone and temperature. The behavior of ozone in February–March 2023 is analyzed. Ozone variations took place during the sudden stratospheric warming (SSW) which occurred in mid-February and was accompanied by an extraordinary increase in the total ozone content (TOC) from 240 to 500 DU. The limits of ozone variations at altitudes of 25, 40, and 60 km are given. The effect of the strong geomagnetic disturbance (storm), which took place on March 23–24, on the daily variations in ozone at an altitude of 60 km is discussed.