Reichert, Robert und Kaifler, Bernd und Janches, Diego und Pautet, P.-Dominique und Rhode, Sebastian und Ungermann, Jörn und Sato, Kaoru (2025) Observation of Mountain Waves and Secondary Gravity Waves in the Mesosphere lower Thermosphere over Patagonia. EGU 2025, 2025-04-26 - 2025-05-02, Wien, Österreich.
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Kurzfassung
On the night of 21/22 May 2018, clear-sky conditions enabled a 12-hour-long temperature measurement of the Advanced Mesospheric Temperature Mapper (AMTM) in the mesosphere-lower thermosphere (MLT) region over Río Grande, Argentina. Given a westerly forcing over Patagonia, we observe North-South-oriented phase lines in the AMTM temperature maps exclusively during the westerly phase of the semi-diurnal tide, indicating the deep propagation of mountain waves (MWs) with horizontal wavelengths between 20 km and 40 km. After a wind reversal in the MLT, we observe two large-scale gravity waves (GWs) propagating rapidly in a south-eastward direction. We use one- and two-dimensional wavelet analysis to characterize the observed GWs and find that their wavelengths and phase speeds are consistent with secondary GW theory. Ray tracing results suggest a possible source region for these 2GWs located north-westward, near the Chilean Torres del Paine region. In addition, co-located temperature and wind measurements from the Compact Rayleigh Autonomous Lidar (CORAL) and the Southern Argentine Agile Meteor Radar (SAAMER), in combination with a Monte Carlo approach, allow for the accurate determination of both the GW momentum flux and its uncertainty. Although we exclude a direct cause-and-effect relationship within our field of view, we find that, on average, the observed MWs carry momentum fluxes an order of magnitude larger than those of the 2GWs.
elib-URL des Eintrags: | https://elib.dlr.de/214258/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||||||||||
Titel: | Observation of Mountain Waves and Secondary Gravity Waves in the Mesosphere lower Thermosphere over Patagonia | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 2 Mai 2025 | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | Lidar, airglow, meteor radar, wavelet analysis, raytracing, JAWARA reanalysis | ||||||||||||||||||||||||||||||||
Veranstaltungstitel: | EGU 2025 | ||||||||||||||||||||||||||||||||
Veranstaltungsort: | Wien, Österreich | ||||||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 26 April 2025 | ||||||||||||||||||||||||||||||||
Veranstaltungsende: | 2 Mai 2025 | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Mittlere Atmosphäre | ||||||||||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Physik der Atmosphäre > Lidar | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Reichert, Robert | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 22 Mai 2025 16:01 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 22 Mai 2025 16:01 |
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