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Robert J. Kurzeja

?D-C-MB-a 1981 R O B E R T J. K U R Z E J A 2779The Transport of Trace Chemicals by Planetary Waves in the Stratosphere. .Part 1: Steady Waves ROBERT J. KURZEJA Joint Institute for Advancement.of Flight Sciences, The George Washington University, NASA-Langley Research Center, Hampton, VA 23665 (Manuscript received 30 March, 1981, in final form 28 July

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E. Tyrlis and B. J. Hoskins

eastern Atlantic and Europe, anticyclonic wave breaking occurs ( Figs. 4c,d ) resulting in a blocking anticyclone through amplification of the ambient planetary ridge ( Fig. 2a ). The polar air advected equatorward and westward in the wave breaking can lead to a cutoff low to the south. Another picture of this evolution is given by Fig. 5 , which presents the evolution in terms of the anomalies in θ on the 2-PVU surface for the same set of days. Four days before onset ( Fig. 5a ) it is seen that

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Mark R. Schoeberl

SEPTEMBER 1981 M A R K R. S C H O E B E R L 1841A Simple Modem of the Lagrangian~Mean Flow Produced by Dissipating Planetary Waves MARK R. SCHOEBERLNaval Research Laboratory, Washington, DC 20375(Manuscript received 6 August 1980, in final form 29 April 1981)ABSTRACT A simple equation for the Lagrangian-mean flow induced by damped planetary waves is derived. Theflow computed for stationary planetary

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Byeong-Gwon Song, Hye-Yeong Chun, and In-Sun Song

Polvani 2007 ; Butler et al. 2017 ). These two types of SSWs have distinct characteristics in planetary waves (PWs) and gravity waves (GWs), as well as the mean wind and temperature ( Albers and Birner 2014 ; Song and Chun 2016 ). More rapid warming and more abrupt breaking of the polar vortex in the stratosphere are observed for vortex-split SSWs ( Charlton and Polvani 2007 ; Harada et al. 2010 ; Bancalá et al. 2012 ; Song and Chun 2016 ; Butler et al. 2017 ). Among the various vortex

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Anthony R. Hansen and Alfonso Sutera

1 JuLY 1995 HANSEN AND SUTERA 2463The Probability Density Distribution of the Planetary-Scale Atmospheric Wave Amplitude Revisited ANTHONY R. HANSENCenter for Atmospheric and Space Sciences, Augsburg College, Minneapolis, Minnesota ALFONSO S UTERADepartment of Mathematics and Physics, University of Camerino, Camerino, Italy(Manuscript received 22 April 1994, in final

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Gang Chen and Lantao Sun

BDC may be driven by nonlinear thermally driven circulations, analogous to tropospheric Hadley cell circulations, and this appears to be particularly important for the tropical upwelling in the summer hemisphere or in the upper stratosphere ( Dunkerton 1989 ; Semeniuk and Shepherd 2001a , b ; Tung and Kinnersley 2001 ; Zhou et al. 2006 ). More importantly, wave drag (i.e., planetary-scale, synoptic-scale, or gravity wave drag) can contribute to the forcing of the BDC through the downward

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Shyh-Chin Chen and Kevin E. Trenberth

682JOURNAL OF THE ATMOSPHERIC SCIENCES-OL. 45, NO. 4Forced Planetary Waves in the Northern Hemisphere Winter:Wave-Coupled Orographic and Thermal Forcings $HYH-CHIN CHEN*Department of Atmospheric Sciences, University of Illinois, Urbana, Illinois KEVIN E. TRENBERTHNational Center for dtmospheric Research,** Boulder, Colorado(Manuscript received 25 February 1987, in final form 31 August 1987)ABSTRACT A more complete and new formulation of the oragraphic forcing and new

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William J. Randel, Duane E. Stevens, and John L. Stanford

c)36 JOURNAL OF THE ATMOSPHERIC SCIENCES VOL. 44, No. 6A Study of Planetary Waves in the Southern Winter Troposphere and Stratosphere. Part II: Life Cycles WILLIAM J. RANDEL* AND DUANE E. STEVENSDepartment of Atmospheric Sciences, Colorado State University, Fort Collins, CO 80523 JOHN L. STANFORDDepartment of Physics, Iowa State University, Ames, IA $0010(Manuscript received 7

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Hye-Yeong Chun, Young-Ha Kim, Hyun-Joo Choi, and Jung-Yoon Kim

planetary and gravity waves ( Holton et al. 1995 ), and its annual cycle could be related to the annual cycle of planetary-wave forcing. However, Plumb and Eluszkiewicz (1999) showed from their numerical simulations that the extratropical wave forcing is not sufficient to drive upwelling near the equator and that wave drag within 20° of the equator is required. They suggested that vertically propagating equatorial planetary and/or gravity waves may contribute to the angular momentum budget in the

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V. Hayashi and D. G. Golder

APRIL 1983 Y. HAYASHI AND D. G. GOLDER 941Transient Planetary Waves Simulated by GFDL Spectral General Circulation Models. Part I: Effects of Mountains Y. HAYASHI AND D. G. GOLDER Geophysical Fluid Dynamics Laboratory/NOAA, Princeton University, Princeton, NJ 08540 (Manuscript received 20 April 1982, in final form 12 November 1982

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