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Extreme mesospheric concentric gravity waves from OH airglow observations over Southern Brazil

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Logo of Copernicus PublicationsCopernicus Publications
 Li, Qinzeng

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Extreme mesospheric concentric gravity waves from OH airglow observations over Southern Brazil
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CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Production Year2025
Production PlaceBeijing

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Abstract
Using an airglow imager from OH channel (715–930 nm) at the Southern Space Observatory (SSO; 29.44°S, 53.82°W) in southern Brazil, extreme mesospheric concentric gravity waves (CGWs) were observed on 17–18 September 2023. These CGWs persisted for over 10 hours, marking the longest-duration event ever recorded, and were associated with fast-propagating severe thunderstorms. The maximum airglow brightness perturbations exceeded 24%, indicating intense momentum deposition into the mesosphere. The wave center moved more than 400 km.