Articles | Volume 34, issue 2
https://doi.org/10.5194/angeo-34-323-2016
https://doi.org/10.5194/angeo-34-323-2016
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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Multi-instrument gravity-wave measurements over Tierra del Fuego and the Drake Passage – Part 1: Potential energies and vertical wavelengths from AIRS, COSMIC, HIRDLS, MLS-Aura, SAAMER, SABER and radiosondes
Corwin J. Wright, Neil P. Hindley, Andrew C. Moss, and Nicholas J. Mitchell
Atmos. Meas. Tech., 9, 877–908, https://doi.org/10.5194/amt-9-877-2016,https://doi.org/10.5194/amt-9-877-2016, 2016
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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.