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12 November 2020 Multi-year changes in the mesoscale waves according to the data of drift and radio-meteor measurements at Collm, Germany
Nikolai M. Gavrilov, Christoph Jacobi
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Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 115607X (2020) https://doi.org/10.1117/12.2574804
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation
Abstract
The intensity of mesoscale wind speed variations with periods 1.7 – 5.6 hr was determined by digital filtering of the measurements at mesosphere and lower thermosphere region, which had been performed at the Collm Observatory of Leipzig University (51.3° N, 13.0° E) using the ionospheric drift method in the years 1983 – 2007 and with a meteor radar in 2004 – 2018. This made it possible to obtain the continuous series of measurements for the interval of 1983 - 2018. Interannual changes at 88 km altitude are studied. The annual mean zonal wind was directed to the east in 1983 – 2018 and grew from 3 to 10 m/s. The meridional southward wind reached a minimum of 2 m/s around 2002 and a maximum of 10 m/s in 2012. The intensity of mesoscale waves varied within the limits of up to 10%.
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Nikolai M. Gavrilov and Christoph Jacobi "Multi-year changes in the mesoscale waves according to the data of drift and radio-meteor measurements at Collm, Germany", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 115607X (12 November 2020); https://doi.org/10.1117/12.2574804
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KEYWORDS
Atmospheric propagation
Doppler effect
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