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GEOPHYSICAL RESEARCH LETTERS,
VOL. 32,
L09801,
doi:10.1029/2004GL021944,
2005
High frequency atmospheric gravity-wave properties using Fe-lidar and OH-imager observations
J. C. Diettrich
British Antarctic Survey, Cambridge, UK
G. J. Nott
British Antarctic Survey, Cambridge, UK
P. J. Espy
British Antarctic Survey, Cambridge, UK
G. R. Swenson
Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois, USA
X. Chu
Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois, USA
M. J. Taylor
Space Dynamics Laboratory and Department of Physics, Utah State University, Logan, Utah, USA
D. M. Riggin
Colorado Research Associates, Boulder, Colorado, USA
D. C. Fritts
Colorado Research Associates, Boulder, Colorado, USA
Abstract
Simultaneous iron resonance lidar density profiles, OH intensity images and MF-radar wind measurements have been used to determine
the horizontal and vertical components of high-frequency (<=∼1 hour) atmospheric gravity waves (AGW). Previous investigations
predicted that AGW information from lidars and imagers could only be combined over a limited range. Here, a novel approach
to increasing the utility of the simultaneous lidar and OH imager measurement are presented. By temporally high-pass filtering
each altitude-bin of the lidar profiles, the vertical wavelengths of AGW typically observed with the OH imager become apparent.
Measured OH imager horizontal wavelengths were converted into vertical wavelengths using the dispersion relationship and background
winds, showing that the instruments were able to observe the same waves. Hence, the lidar-imager combination is able to access
the intrinsic wave components to allow investigation of AGW propagation and an assessment of the chemical waves effects on
minor species chemistry.
Received 8
November
2004;
accepted 23
March
2005;
published 5
May
2005.
Index Terms: 3384 Atmospheric Processes: Acoustic-gravity waves; 3394 Atmospheric Processes: Instruments and techniques; 0310 Atmospheric Composition and Structure: Airglow and aurora.
Subscriber Access to Full Article (Nonsubscribers may purchase for $9.00, Includes print PDF, file size: 196390 bytes)
Citation: Diettrich, J. C., G. J. Nott, P. J. Espy, G. R. Swenson, X. Chu, M. J. Taylor, D. M. Riggin, and D. C. Fritts
(2005),
High frequency atmospheric gravity-wave properties using Fe-lidar and OH-imager observations,
Geophys. Res. Lett.,
32,
L09801,
doi:10.1029/2004GL021944.
Copyright 2005 by the American Geophysical Union.
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