Articles | Volume 13, issue 9
Atmos. Meas. Tech., 13, 5117–5128, 2020
https://doi.org/10.5194/amt-13-5117-2020
Atmos. Meas. Tech., 13, 5117–5128, 2020
https://doi.org/10.5194/amt-13-5117-2020

Research article 29 Sep 2020

Research article | 29 Sep 2020

Intra-annual variations of spectrally resolved gravity wave activity in the upper mesosphere/lower thermosphere (UMLT) region

René Sedlak et al.

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by René Sedlak on behalf of the Authors (06 Jul 2020)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (20 Jul 2020) by Christian von Savigny
RR by Anonymous Referee #2 (04 Aug 2020)
ED: Publish subject to minor revisions (review by editor) (04 Aug 2020) by Christian von Savigny
AR by René Sedlak on behalf of the Authors (05 Aug 2020)  Author's response    Manuscript
ED: Publish as is (18 Aug 2020) by Christian von Savigny
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Short summary
Gravity wave (GW) activity in the UMLT in the period range 6-480 min is calculated by applying a wavelet analysis to nocturnal temperature time series derived from OH* airglow spectrometers. We analyse measurements from eight different locations at different latitudes. GW activity shows strong period dependence. We find hardly any seasonal variability for periods below 60 min and a semi-annual cycle for periods longer than 60 min that evolves into an annual cycle around a period of 200 min.