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Cristina Peña-Ortiz, Elisa Manzini, and Marco A. Giorgetta

1. Introduction Stationary planetary waves play an important role in the stratospheric circulation and temperature, being a major forcing of the Brewer–Dobson circulation ( Cohen et al. 2014 ). They propagate from the troposphere where they are generated by different orographic and thermal forcings. In the Southern Hemisphere (SH) the stationary (monthly mean) wave field is dominated by the zonal wavenumber-1 component (herein called wave 1), which reaches its maximum amplitude at about 60°S in

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Lina Boljka and Theodore G. Shepherd

found between wave activity and heat flux in Wang and Nakamura (2015 , 2016 ). To derive a theoretical framework for understanding planetary–synoptic-scale interactions and the apparent decoupling of the baroclinic and barotropic parts of the flow, we use multiscale asymptotic methods as introduced in Dolaptchiev and Klein (2009 , 2013 , hereafter DK09 and DK13 , respectively). This approach is taken as such methods provide a self-consistent (albeit idealized) framework for studying

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Ming Cai and Mankin Mak

15DECEMBER 1990 MING CAI AND MANKIN MAK 2953Symbiotic Relation between Planetary and Synoptic-Scale Waves MING CAI* AND MANKIN MAKDepartment of Atmospheric Sciences, University of lllinois, Urbana, lllinois(Manuscript received 12 February 1990, in final form 13 June 1990) ABSTRACT It is hypothesized that the low-frequency planetary scale waves and the high

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Kevin E. Trenberth

1378 MONTHLY WEATHER REVIEW VOLUME 108Planetary Waves at 500 mb in the Southern Hemisphere KEVIN E. TRENBERTHLaboratory for Atmospheric Research, University of Illinois, Urbana 61801(Manuscript received 22 November 1979, in final form 3 April 1980) ABSTRACT The zonally asymmetric c~mponent of the 500 mb flow in the Southern Hemisphere has been analyzedinto wavenumber

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Marcus Löfverström, Rodrigo Caballero, Johan Nilsson, and Gabriele Messori

strengthening and zonalization of the Atlantic jet. We find that the stationary planetary waves excited by the LIS topography play a central role in governing this response. The stationary waves excited by midlatitude topography and diabatic heating propagate predominantly equatorward and are absorbed in the subtropics ( Held 1983 ; Held et al. 2002 ). These equatorward-propagating planetary waves have southwest–northeast-tilted phase lines, which contributes to the observed poleward tilt of the modern

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Andrew Orr, Thomas J. Bracegirdle, J. Scott Hosking, Thomas Jung, Joanna D. Haigh, Tony Phillips, and Wuhu Feng

the SH climate remain unclear (e.g., Hartmann et al. 2000 ; Gillett and Thompson 2003 ; Son et al. 2008 ; McLandress et al. 2010 ; Thompson et al. 2011 ). The downward propagation of zonal mean zonal wind anomalies in the stratosphere are closely associated with anomalies in stratospheric wave drag caused by the vertical extent of the propagation of planetary-scale waves (e.g., Kuroda and Kodera 1999 ; Baldwin and Dunkerton 2001 ; Christiansen 2001 ), which is determined by the strength

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Saburo Miyahara

100 JOURNAL OF THE ATMOSPHERIC SCIENCES I JANUARY1985Suppression of Stationary Planetary Waves by Internal Gravity ' Waves in the Mesosphere SABURO MIYAHARA1Geophysical Fluid Dynamics Program, Princeton University, Princeton. NJ 08542(Manuscript received 2 April 1984, in final form 25 October t984) ABSTRACT The suppression of stationary planetary waves by internal gravity waves in the

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Jule G. Charney and David M. Straus

JIJNE 1980JULE G. CHARNEY AND DAVID M. STRAUS1157' Form-Drag Instability, Multiple Equilibria and Propagating Planetary Waves inBaroclinic, Orographically Forced, Planetary Wave SystemsJULE G. CHARNEYMassachusetts Institute of Technology, Cambridge 02139DAVID M. STRAUSNational Research Council, Washington, DC, and Laboratory for Atmospheric Sciences, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (Manuscript received 26 September 1979, in final form 3 March 1980)ABSTRACTA two

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Walter A. Robinson

1006 JOURNAL OF THE ATMOSPHERIC SCIENCES VOL. 43, No. IOInteractions between Stationary Planetary Waves in the Stratosphere WALTER A. ROBINSONDepartment of Atmospheric Sciences, University of Washinglon, Seattle, WA 98195 (Manuscript received 6 August 1985, in final form 26 December 1985)ABSTRACTInteractions between stationary planetary waves are investigated in the context of severely truncated quasigeostrophic dynamics in a midlatitude betachannel. Such interactions are solely a

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January 1967Raymond J. Deland and Yeong-Jer Lin21ON THE MOVEMENT AND PREDICTION OF TRAVELING PLANETARY-SCALE WAVESRAYMOND J. DELAND AND YEONG-JER LINNew York University,* Bronx, N.Y.ABSTRACT Fluctuations of the planetary-scale waves, represented by spherical harmonics of the 500-mb. geopotentialfield, arc statistically analyzed. A study is made of the prediction of these fluctuat,ions from previous changes andusing the non-divergent spherical vorticity equation.1. INTRODUCTIONWhen numerical

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