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Observations of Gravity Wave Refraction and Its Causes and Consequences

Geldenhuys, M. ; Kaifler, B.; Preusse, P.; Ungermann, J.; Alexander, P.; Krasauskas, L.; Rhode, S.; Woiwode, W. 1; Ern, M.; Rapp, M.; Riese, M.
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF), Karlsruher Institut für Technologie (KIT)


Horizontal gravity wave (GW) refraction was observed around the Andes and Drake Passage during the SouthTRAC campaign. GWs interact with the background wind through refraction and dissipation. This interaction helps to drive midatmospheric circulations and slows down the polar vortex by taking GW momentum flux (GWMF) from one location to another. The SouthTRAC campaign was composed to gain improved understanding of the propagation and dissipation of GWs. This study uses observational data from this campaign collected by the German High Altitude Long Range research aircraft on 12 September 2019. During the campaign a minor sudden stratospheric warming in the southern hemisphere occurred, which heavily influenced GW propagation and refraction and thus also the location and amount of GWMF deposition. Observations include measurements from below the aircraft by Gimballed Limb Observer for Radiance Imaging of the Atmosphere and above the aircraft by Airborne Lidar for the Middle Atmosphere. Refraction is identified in two different GW packets as low as ≈4 km and as high as 58 km. One GW packet of orographic origin and one of nonorographic origin is used to investigate refraction. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000156213
Veröffentlicht am 23.02.2023
DOI: 10.1029/2022JD036830
Zitationen: 4
Web of Science
Zitationen: 5
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 16.02.2023
Sprache Englisch
Identifikator ISSN: 2169-897X, 2169-8996
KITopen-ID: 1000156213
HGF-Programm 12.11.25 (POF IV, LK 01) Atmospheric composition and circulation changes
Erschienen in Journal of Geophysical Research: Atmospheres
Verlag John Wiley and Sons
Band 128
Heft 3
Seiten Art.Nr:e2022JD036830
Vorab online veröffentlicht am 10.01.2023
Schlagwörter gravity wave, mountain wave, refraction, Andes, Drake Passage, gravity wave momentum flux
Nachgewiesen in Dimensions
Web of Science
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