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John P. Boyd

770JO'URNAL OF THE ATMOSPHERIC SCIENCESVOLUM- 39The Influence of Meridional Shear on Planetary Waves. Part 2: Critical Latitudes JOHN P. BOYDlCenter for Earth and Planetary Physics, Harvard University, Cambridge, M.4 02158(Manuscript received 9 March 1981, in final form 2 December 1981)ABSTRACT With the simplifying assumption that the mean zonal wind is a function of latitude only, numerical andanalytical methods are applied to study the effects of critical

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A. Ghazi, Pi-Huan Wang, and M. P. McCormick

2032 JOURNAL OF THE ATMOSPHERIC SCIENCES VOL. 42, NO. 19A Study on Radiative Damping of Planetary Waves Utilizing Stratospheric Observations A. GHAZI*Commission of the European Communities, 1049 Brussels. Belgium PI-HUAN WANGScience and Technology Corporation. Hampton, Virginia 23666 M. P. MCCORMICKAtmospheric Sciences Division, NASA-Langley Research Center, Hampton, Virginia 23665

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Dennis L. Hartmann and Rolando R. Garcia

350 JOURNAL OF THE ATMOSPHERIC SCIENCES VoL~J~t~.36A Mechanistic Model of Ozone Transport by Planetary Waves in the Stratosphere~ DENNIS L. HARTMANND~partment of Atmosph~.ic S~iences, University of Washington, Seattle 98195 ROLANDO R. GARCIA 31ational Cent~ for Atmospheric l~search? Bould~, CO 80307(Manuscript received 3 August 1978, in final form I November 1978)ABSTRACT The role

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Carlos R. Mechoso and Dennis L. Hartmann

SEPTEMBER 1982 CARLOS R. MECHOSO AND DENNIS L. HARTMANN 1921An Observational Study of Traveling Planetary Waves in the Southern Hemispheret CARLOS R. MECHOSODepartment of Atmospheric Sciences, University of California, Los Angeles 90024 DENNIS L. HARTMANN Department of Atmospheric Sciences, University of Washington, Seattle 98195 (Manuscript received 3 February 1982, in

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Jonathan S. Kinnersley and Ka-Kit Tung

the observed IAV. This paper will focus on two sources of natural variability: the equatorial quasi-biennial oscillation (QBO) in zonal wind and the variability in the forcing of stratospheric planetary waves at the tropopause. The former has been studied fairly extensively already, using both observations (e.g., Hasebe 1984 ; Bowman 1989 ; Lait et al. 1989 ; Randel and Cobb 1994 ; Tung and Yang 1994a ; Hollandsworth et al. 1995 ; Randel and Wu 1996 ; Sitnov 1996 ) and models (e.g., Gray

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Greg Holloway

314 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME40Effects of Planetary Wave Propagation and Finite Depth on the Predictability of AtmospheresI GREG HOLLOWAYInstitute of Ocean Sciences, Sidney, British Columbia, Canada Y8L 4B2 and School of Oceanography, University of I'Vashington. Seattle. 98195 (Manuscript received 30 March 1982, in final form 28 September

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D. Rind, R. Suozzo, and N. K. Balachandran

I FEBRUARY 1988 D. RIND, R. SUOZZO AND N. K. BALACHANDRAN 371The GISS Global Climate-Middle Atmosphere Model. Part II: Model Variability Due toInteractions between Planetary Waves, the Mean Circulation and Gravity Wave DragD. RIND, R. SUOZZO,* AND N. K. BALACHANDRAN**Goddard Space Flight Center, Institute for Space Studies, New York, N. Y,(Manuscript received 3 April 1987, in final form 20 April 1987)ABSTRACT The

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Peter G. Hess and James R. Holton

1580 JOURNAL OF THE ATMOSPHERIC SCIENCES VOL. 42, No. 15Tracer Transport by Planetary Waves: A Comparison of Explicit and Parameterized Models PETER G. HESS AND JAMES R. HOLTONDepartment of .4tmospheric Sciences, .4K-40, University of Washington, Seattle, Washington 98195(Manuscript received 6 April 1984, in final form I March 1985)ABSTRACT A two-dimensional stratospheric tracer

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J. Gavin Esler, Lorenzo M. Polvani, and R. Alan Plumb

and Karoly 1981 ; Webster 1981 ). These studies, and others, showed that planetary-scale Rossby waves tend to propagate approximately along the arcs of great circles. However, linear theory does not give insight into the behavior of finite-amplitude wave trains when they reach a critical line, where the flow speed equals the phase speed of the waves (e.g., Killworth and McIntyre 1985 ). Recently, Waugh et al. (1994, hereafter WPP) and Brunet and Haynes (1996, hereafter BH) , have used a

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Samuel F. Potter, Thomas Spengler, and Isaac M. Held

planetary waves. The WKB approximation allows us to speak of a local dispersion relation and, in particular, a stationary Rossby wavenumber, concepts that are used continually in discussion of stationary wave trains in models and observations. In the WKB approximation, a Rossby wave is deformed or refracted as it passes through the inhomogeneous mean flow, but reflections are assumed small. Given the central role played by the WKB approximation, we believe that it is useful to quantify the amount of

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