Advances in Radio Science
Advances in Radio Science
ARS
Articles | Volume 21
Articles | Volume 21
https://doi.org/10.5194/ars-21-111-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ars-21-111-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21
01 Dec 2023
 | 01 Dec 2023

Long-term trends of midlatitude horizontal mesosphere/lower thermosphere winds over four decades

Christoph Jacobi, Ales Kuchar, Toralf Renkwitz, and Juliana Jaen

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Akmaev, R.: Modeling the cooling due to CO2 increases in the mesosphere and lower thermosphere, Phys. Chem. Earth A/B/C, 27, 521–528, https://doi.org/10.1016/S1474-7065(02)00033-5, 2002. a
Beig, G.: Long-term trends in the temperature of the mesosphere/lower thermosphere region: 2. Solar response, J. Geophys. Res.-Space, 116, A00H12, https://doi.org/10.1029/2011JA016766, 2011. a
Beig, G., Keckhut, P., Lowe, R. P., Roble, R. G., Mlynczak, M. G., Scheer, J., Fomichev, V. I., Offermann, D., French, W. J. R., Shepherd, M. G., Semenov, A. I., Remsberg, E. E., She, C. Y., Lübken, F. J., Bremer, J., Clemesha, B. R., Stegman, J., Sigernes, F., and Fadnavis, S.: Review of mesospheric temperature trends, Rev. Geophys., 41, 1015, https://doi.org/10.1029/2002RG000121, 2003. a
Bremer, J.: Long-term trends in the ionospheric E and F1 regions, Ann. Geophys., 26, 1189–1197, https://doi.org/10.5194/angeo-26-1189-2008, 2008. a
Bremer, J. and Berger, U.: Mesospheric temperature trends derived from ground-based LF phase-height observations at mid-latitudes: comparison with model simulations, J. Atmos. Sol.-Terr. Phys., 64, 805–816, https://doi.org/10.1016/S1364-6826(02)00073-1, 2002. a, b
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Middle atmosphere long-term changes show the signature of climate change. We analyse 43 years of mesopause region horizontal winds obtained at two sites in Germany. We observe mainly positive trends of the zonal prevailing wind throughout the year, while the meridional winds tend to decrease in magnitude in both summer and winter. Furthermore, there is a change in long-term trends around the late 1990s, which is most clearly visible in summer winds.
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