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Gravity wave reflection: case study based on rocket data.

Wüst, Sabine und Bittner, Michael (2008) Gravity wave reflection: case study based on rocket data. Journal of Atmospheric and Solar-Terrestrial Physics, 70 (5), Seiten 742-755. Elsevier. DOI: 10.1016/j.jastp.2007.10.010. ISSN 1364-6826.

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Offizielle URL: http://dx.doi.org/10.1016/j.jastp.2007.10.010

Kurzfassung

Since gravity waves significantly influence the atmosphere by transporting energy and momentum, it is important to study their wave spectrum and their energy dissipation rates. Besides that, knowledge about gravity wave sources and the propagation of the generated waves is essential. Originating in the lower atmosphere, gravity waves can move upwards; when the background wind field is equal to their phase speed a so-called critical layer is reached. Their breakdown and deposition of energy and momentum is possible. Another mechanism which can take place at critical layers is gravity wave reflection. In this paper gravity waves which were observed by foil chaff measurements during the DYANA campaign (DYnamics Adapted Network for the Atmosphere) in 1990 in Biscarrosse (44°N, 1°W)—as reported by Wüst and Bittner [2006. Non-linear wave-wave interaction: case studies based on rocket data and first application to satellite data. Journal of Atmospheric and Solar-Terrestrial Physics 68, 959 - 976]—are investigated to look for gravity wave reflection processes. Following nonlinear theory, energy dissipation rates according to Weinstock [1980. Energy dissipation rates of turbulence in the stable free atmosphere. Journal of the Atmospheric Sciences 38, 880 - 883] are calculated from foil chaff cloud and falling sphere data and compared to the critical layer heights. Enhanced energy dissipation rates are found at those altitudes where the waves’ phase speed matches the zonal background wind speeds. Indication of gravity wave trapping is found between two altitudes of around 95 km and 86 km.

Dokumentart:Zeitschriftenbeitrag
Titel:Gravity wave reflection: case study based on rocket data.
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Wüst, Sabinesabine.wuest@dlr.de
Bittner, Michaelmichael.bittner@dlr.de
Datum:März 2008
Erschienen in:Journal of Atmospheric and Solar-Terrestrial Physics
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:70
DOI :10.1016/j.jastp.2007.10.010
Seitenbereich:Seiten 742-755
Verlag:Elsevier
ISSN:1364-6826
Status:veröffentlicht
Stichwörter:Gravity wave reflection; Energy dissipation rates; Wave guide; Mesosphere
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Datenprodukte für Klima- und Atmosphärenanwendungen (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Deutsches Fernerkundungsdatenzentrum > Klima- und Atmosphärenprodukte
Deutsches Fernerkundungsdatenzentrum
Hinterlegt von: Sabine Wüst
Hinterlegt am:04 Mär 2008
Letzte Änderung:24 Apr 2013 16:20

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