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John H. E. Clark and Thomas G. Rogers

2232 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLVME35The Transport of Conservative Trace Gases by Planetary Waves JOHN H. ]~. CLARK AND THOMAS G. ROtERSDepartment of Meteorology, The Pennsylvania S~a~ University, University Park 16802(Manuscript received 25 April 1978, in final form 22 August 1978)ABSTRACT An analytical model for the horizontal and vertical transport of a conservative trace gas by a

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Richard S. Lindzen

394 JOURNAL OF THE ATMOSPHERIC SCIENCES Vo~.~J~m27Internal ]Equatorial Planetary-Scale Waves in Shear Flow R~CaAaD S. Lnvoz~Dept. of the Geophydza~ Sciences, The University of Chicago(Manuscript received 19 October 1969)ABSTRACT The theory of internal equatorial planetary-scale waves as developed by Matsuno and by Lindzen isextended to include the effects of shear in the basic state. By means of a

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Richard E. Young and Howard Houben

15MAYI989 RICHARD E. YOUNG AND HOWARD HOUBEN 1365Dynamics of Planetary-Scale Baroclinic Waves during Southern Hemisphere Winter RICHARD E. YOUNGSpace Science Division, NASA-Ames Research Center, Moffett Field, California HOWARD HOUBEN Mycol, Inc. Sunnyvale, California (Manuscript received 2 February 1988, in final forrq. 11 November 1988

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Robert E. Dickinson

984 JOURNAL OF THE ATMOSPHERIC SCIENCES Vo~.~s~E 25Planetary Rossby Waves Propagating Vertically Through Weak Westerly Wind Wave Guidest ROBERT E. I)ICKI~,'SON~Massachusetts Institute of Technology, Cambridge(Manuscr/pt received 5 December 1967, in revised form 15 May 1968) The role of horizontal wind shears in the vertical propagation of planetary Rossby waves is investigatedusing an

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Lucy J. Campbell and Theodore G. Shepherd

1. Introduction The quasi-biennial oscillation (QBO) is an oscillation between easterly and westerly zonal winds that is observed in the equatorial stratosphere. It is known to result from momentum transfer via upward-propagating atmospheric waves. Atmospheric general circulation models (GCMs) are able to resolve the planetary-scale equatorial waves (Kelvin waves and mixed Rossby–gravity waves), and the role that these waves play in driving the QBO is well known. In general, GCMs have

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John R. Albers, George N. Kiladis, Thomas Birner, and Juliana Dias

–tropical teleconnection pattern and are part of a subclass of planetary waveguides discussed in previous studies (e.g., Hoskins and Ambrizzi 1993 ). As Rossby waves propagate along the Pacific and Atlantic waveguides, they eventually grow in amplitude and break ( Scott and Cammas 2002 ; Abatzoglou and Magnusdottir 2006 ; Hitchman and Huesmann 2007 ). As the waves break, large intrusions of high-PV air extend equatorward and downward from the lower stratosphere into the upper troposphere, while low-PV tropospheric

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Kevin E. Trenberth

1126 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUMEdO.Interactions Between Orographically and Thermally Forced Planetary Waves KEVlN E. TRENBERTHDepartment of Atmospheric Sciences, University of lllinois, Urbana, 61801(Manuscript received 2 November 1982, in final form 11 January 1983)ABSTRACT A comprehensive analysis has been made of the atmospheric planetary wave response to orographic

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Peter Hitchcock, Theodore G. Shepherd, Masakazu Taguchi, Shigeo Yoden, and Shunsuke Noguchi

characterized by the strong suppression of planetary wave propagation into the vortex. Since radiatively driven processes are likely to be much more predictable than the strongly nonlinear wave driving, this suggests at least a proximate reason for the enhanced predictability. The present study, then, is in part motivated by an attempt to better understand the dynamics of these PJO events in the context of a simplified, “mechanistic” circulation model, of the type motivated by Held and Suarez (1994) . Such

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John H. E. Clark

1430 JOURNAl. OF THE ATMOSPHERIC SCIENCES VoLua~29The Vertical l~ropagation of Forced Atmospheric Planetary Waves Jom~ H. E. C~AxK Atmospheric Science Group, Dept. oJ Civil Engineering, The University of Texas at Austin (Manuscript received 1 September 1971, in revised form 5 September 1972)ABSTRACT Adiabatic, inviscid, quasi-geostrophic perturbations on a t~ plane are forced at some

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Mark P. Baldwin and James R. Holton

IAPRlL1988 MARK P. BALDWIN AND JAMES R. HOLTON 1123Climatology of the Stratospheric Polar Vortex and Planetary Wave BreakingMARK P. BALDWIN AND JAMES R. HOLTONDepartment of Atmospheric Sciences, University of Washington(Manuscript received 1 May 1987, in final form 22 October 1987)ABSTRACT We use the distribution of Ertel's potential vorticity (PV) on the 850 K isentropic surface to establish aclimatology for

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