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Superposition of gravity waves with different propagation characteristics observed by airborne and space-borne infrared sounders

Krisch, Isabell; Ern, Manfred; Hoffmann, Lars; Preusse, Peter; Strube, Cornelia; Ungermann, Jörn; Woiwode, Wolfgang; Riese, Martin

Abstract:
Many gravity wave analyses, based on either observations or model simulations, assume the presence of only a single dominant wave. This paper shows that there are much more complex cases with gravity waves from multiple sources crossing each others' paths. A complex gravity wave structure consisting of a superposition of multiple wave packets was observed above southern Scandinavia on 28 January 2016 with the Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA). The tomographic measurement capability of GLORIA enabled a detailed 3-D reconstruction of the gravity wave field and the identification of multiple wave packets with different horizontal and vertical scales. The larger-scale gravity waves with horizontal wavelengths of around 400 km could be characterised using a 3-D wave-decomposition method. The smaller-scale wave components with horizontal wavelengths below 200 km were discussed by visual inspection. For the larger-scale gravity wave components, a combination of gravity-wave ray-tracing calculations and ERA5 reanalysis fields identified orography as well as a jet-exit region and a low-pressure system as possible sources. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000126854
Veröffentlicht am 26.11.2020
Originalveröffentlichung
DOI: 10.5194/acp-20-11469-2020
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 07.10.2020
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000126854
HGF-Programm 12.04.03 (POF III, LK 01) Stratospheric Ozone and Climate Change
Erschienen in Atmospheric chemistry and physics
Band 20
Heft 19
Seiten 11469–11490
Nachgewiesen in Scopus
Web of Science
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