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ANGEO | Articles | Volume 37, issue 1
Ann. Geophys., 37, 1-14, 2019
https://doi.org/10.5194/angeo-37-1-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Ann. Geophys., 37, 1-14, 2019
https://doi.org/10.5194/angeo-37-1-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 11 Jan 2019

Regular paper | 11 Jan 2019

Connection between the length of day and wind measurements in the mesosphere and lower thermosphere at mid- and high latitudes

Sven Wilhelm et al.
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Cited articles  
Abarca del Rio, R., Gambis, D., Salstein, D., Nelson, P., and Dai, A.: Solar activity and earth rotation variability, J. Geodyn., 36, 423–443, https://doi.org/10.1016/S0264-3707(03)00060-7, 2003. a
Abraca del Rio, R., Gambis, D., and Salstein, D.: Interannual signal in length of day and atmospheric angular momentum, Ann. Geophys., 18, 347–364, https://doi.org/10.1007/s00585-000-0347-9, 1999. a
Altamimi, Z., Collilieux, X., Legrand, J., Garayt, B., and Boucher, C.: ITRF2005: A new release of the International Terrestrial Reference Frame based on time series of station positions and Earth Orientation Parameters, J. Geophys. Res., 112, B09401, https://doi.org/10.1029/2007JB004949, 2007. a
Aoki, S., Guinot, B., Kaplan, G., Kinoshita, H., McCarthy, D., and Seidelmann, P.: The new Definition of Universal Time, Astron. Astrophys., 105, 359–361, 1981. a, b, c
Bizouard, C., Lambert, S., Becker, O., and Richard, J.: Combined solution C04 for Earth Rotation Parameter consistent with International Terrestrial Reference Frame 2014, available at: https://hpiers.obspm.fr/iers/eop/eopc04/C04.guide.pdf, last access: 26 July 2017. a
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This study shows that the mesospheric winds are affected by an expansion–shrinking of the mesosphere and lower thermosphere that takes place due to changes in the intensity of the solar radiation, which affects the density within the atmosphere. On seasonal timescales, an increase in the neutral density occurs together with a decrease in the eastward-directed zonal wind. Further, even after removing the seasonal and the 11-year solar cycle variations, we show a connection between them.
This study shows that the mesospheric winds are affected by an expansion–shrinking of the...
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