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Excitation and Evolution of the Quasi-2-Day Wave Observed UARS/MLS Temperature MeasurementsThe quasi-2-day wave is known as a strong and transient perturbation in the middle and upper atmosphere that often occurs shortly after solstice. The excitation mechanisms of this transient wave have been discussed for years, but no clear answer has yet been attained. In this paper, propagating characteristics of the 2-day wave are studied based on 8-mon temperature measurements from the Microwave Limb Sounder onboard the Upper Atmosphere Research Satellite. The studies are focused on the wave events that happened in January 1993 and in July-August 1993. The observations suggest that winter planetary waves could be responsible for triggering the summer 2-day wave through long penetration into the summer stratosphere. A connection is evident in the evolution of the wave amplitude between the summer 2-day wave generation and winter wave penetration. The data also suggest that the enhancement of the wave amplitude is a manifestation of both a local unstable wave and a global normal-mode Rossby wave.
Document ID
19990069564
Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
Authors
Wu, D. L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Fishbein, E. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Read, W. G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Waters, J. W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Date Acquired
August 19, 2013
Publication Date
March 1, 1996
Publication Information
Publication: Journal of the Atmospheric Sciences
Publisher: American Meteorological Society
Volume: 53
Issue: 5
Subject Category
Meteorology And Climatology
Distribution Limits
Public
Copyright
Other

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