Abstract:Abstract. This article reviews main progress in investigations of long-term trends in the mesosphere, thermosphere and ionosphere over the period 2018–2022. Overall this progress may be considered significant. The research was most active in the area of trends in the mesosphere and lower thermosphere (MLT). Contradictions on CO2 concentration trends in the MLT region have been solved; in the mesosphere trends do not differ statistically from trends near surface. The results on temperature trends in the MLT reg… Show more
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