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Large-Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 2. Nonlinear Dynamics, Wave Breaking, and Instabilities

Fritts, D. C. and Wang, Ling and Taylor, Michael J. and Pautet, Pierre-Dominique and Criddle, Neal R. and Kaifler, Bernd and Eckermann, Stephen D. and Liley, Ben (2019) Large-Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 2. Nonlinear Dynamics, Wave Breaking, and Instabilities. Journal of Geophysical Research: Atmospheres, 124 (17-18), pp. 10006-10032. Wiley. DOI: 10.1029/2019JD030932 ISSN 0148-0227

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JD030899

Abstract

Weak cross-mountain flow over the New Zealand South Island on 21 June 2014 during the Deep Propagating Gravity Wave Experiment (DEEPWAVE) led to large-amplitude mountain waves in the mesosphere and lower thermosphere. The mesosphere and lower thermosphere responses were observed by ground-based instruments in the lee of the Southern Alps supporting DEEPWAVE, including an Advanced Mesosphere Temperature Mapper, a Rayleigh lidar, an All-Sky Imager, and a Fabry-Perot Interferometer. The character of the mountain wave responses at horizontal scales of ~30–90 km reveals strong “sawtooth” variations in the temperature field suggesting large vertical and horizontal displacements leading to mountain wave overturning. The observations also reveal multiple examples of apparent instability structures within the mountain wave field that arose accompanying large amplitudes and exhibited various forms, scales, and evolutions. This paper employs detailed data analyses and results of numerical modeling of gravity wave instability dynamics to interpret these mountain wave dynamics, their instability forms, scales, and expected environmental influences. Results demonstrate apparently general instability pathways for breaking of large-amplitude gravity waves in environments without and with mean shear. A close link is also found between large-amplitude gravity waves and the dominant instability scales that may yield additional abilities to quantify gravity wave characteristics and effects.

Item URL in elib:https://elib.dlr.de/130402/
Document Type:Article
Title:Large-Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 2. Nonlinear Dynamics, Wave Breaking, and Instabilities
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fritts, D. C.GATS Inc./BoulderUNSPECIFIED
Wang, LingGATS Inc., Boulder, CO, USAUNSPECIFIED
Taylor, Michael J.Utah State University, Logan, UtahUNSPECIFIED
Pautet, Pierre-DominiqueUtah State UniversityUNSPECIFIED
Criddle, Neal R.Utah State Univ., Logan, UT, USAUNSPECIFIED
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Eckermann, Stephen D.NRL, Washington, DC, USAUNSPECIFIED
Liley, BenNIWA, Lauder, New Zealandhttps://orcid.org/0000-0002-8844-7928
Date:30 August 2019
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:124
DOI :10.1029/2019JD030932
Page Range:pp. 10006-10032
Publisher:Wiley
ISSN:0148-0227
Status:Published
Keywords:mountain waves, mesospheric mountain waves, gravity wave breaking, gravity wave instabilities
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):Vorhaben Mittlere Atmosphäre
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Lidar
Deposited By: Kaifler, Dr. Natalie
Deposited On:12 Nov 2019 09:03
Last Modified:12 Nov 2019 09:03

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