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Large-Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 1. Wave Development, Scales, Momentum Fluxes, and Environmental Sensitivity

Taylor, Michael J. and Pautet, Pierre-Dominique and Fritts, David C. and Kaifler, Bernd and Smith, Steven M. and Zhao, Yucheng and Criddle, Neal R. and McLaughlin, Pattilyn and Pendleton Jr., William R. and McCarthy, Michael P. and Hernandez, Gonzalo and Eckermann, Stephen D. and Doyle, James A. and Rapp, Markus and Liley, Ben and Russell III, James M. (2019) Large-Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 1. Wave Development, Scales, Momentum Fluxes, and Environmental Sensitivity. Journal of Geophysical Research: Atmospheres, 124 (19), pp. 10364-10384. Wiley. DOI: 10.1029/2019JD030932 ISSN 0148-0227

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JD030932


A remarkable, large-amplitude, mountain wave (MW) breaking event was observed on the night of 21 June 2014 by ground-based optical instruments operated on the New Zealand South Island during the Deep Propagating Gravity Wave Experiment (DEEPWAVE). Concurrent measurements of the MW structures, amplitudes, and background environment were made using an Advanced Mesospheric Temperature Mapper, a Rayleigh Lidar, an All-Sky Imager, and a Fabry-Perot Interferometer. The MW event was observed primarily in the OH airglow emission layer at an altitude of ~82 km, over an ~2-hr interval (~10:30–12:30 UT), during strong eastward winds at the OH altitude and above, which weakened with time. The MWs displayed dominant horizontal wavelengths ranging from ~40 to 70 km and temperature perturbation amplitudes as large as ~35 K. The waves were characterized by an unusual, “saw-tooth” pattern in the larger-scale temperature field exhibiting narrow cold phases separating much broader warm phases with increasing temperatures toward the east, indicative of strong overturning and instability development. Estimates of the momentum fluxes during this event revealed a distinct periodicity (~25 min) with three well-defined peaks ranging from ~600 to 800 m2/s2, among the largest ever inferred at these altitudes. These results suggest that MW forcing at small horizontal scales (<100 km) can play large roles in the momentum budget of the mesopause region when forcing and propagation conditions allow them to reach mesospheric altitudes with large amplitudes. A detailed analysis of the instability dynamics accompanying this breaking MW event is presented in a companion paper, Fritts et al. (2019, https://doi.org/10.1029/2019jd030899).

Item URL in elib:https://elib.dlr.de/130337/
Document Type:Article
Title:Large-Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 1. Wave Development, Scales, Momentum Fluxes, and Environmental Sensitivity
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Taylor, Michael J.Utah State University, Logan, UtahUNSPECIFIED
Pautet, Pierre-DominiqueUtah State UniversityUNSPECIFIED
Fritts, David C.GATS, Boulder, ColoradoUNSPECIFIED
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Smith, Steven M.Boston University, Boston, MAUNSPECIFIED
Zhao, YuchengUtah State Univ., Logan, UT, USAUNSPECIFIED
Criddle, Neal R.Utah State Univ., Logan, UT, USAUNSPECIFIED
McLaughlin, PattilynUtah State Univ., Logan, UT, USAUNSPECIFIED
McCarthy, Michael P.University of Washington, Seattle, WA, USAUNSPECIFIED
Hernandez, GonzaloUniversity of Washington, Seattle, WA, USAUNSPECIFIED
Eckermann, Stephen D.NRL, Washington, DC, USAUNSPECIFIED
Doyle, James A.Marine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Rapp, MarkusDLR, IPAhttps://orcid.org/0000-0003-1508-5900
Liley, BenNIWA, Lauder, New Zealandhttps://orcid.org/0000-0002-8844-7928
Russell III, James M.center for atmospheric sciences, hampton, usaUNSPECIFIED
Date:6 September 2019
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1029/2019JD030932
Page Range:pp. 10364-10384
Keywords:mountain waves, mesospheric mountain waves, gravity wave breaking, optical observations, remote sensing
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:11 Nov 2019 14:29
Last Modified:06 Mar 2020 03:00

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