Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 34, issue 2
Articles | Volume 34, issue 2
https://doi.org/10.5194/angeo-34-323-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-34-323-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 34, issue 2
Regular paper
 | 
03 Mar 2016
Regular paper |  | 03 Mar 2016

Gravity-wave momentum fluxes in the mesosphere over Ascension Island (8° S, 14° W) and the anomalous zonal winds of the semi-annual oscillation in 2002

Andrew C. Moss, Corwin J. Wright, Robin N. Davis, and Nicholas J. Mitchell

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Short summary
Gravity waves are fundamental to the dynamics of the mesosphere. In some years very strong winds are observed in the first phase of the MSAO. It has been proposed that this is due to filtering of ascending gravity waves. We report the first gravity-wave momentum flux observations from the Ascension Island (8° S, 14° W) meteor radar and show that anomalous fluxes were observed during one such event in 2002. Analysis of the underlying winds suggests the wave-filtering hypothesis is not valid.
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