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W. K. Dewar

1. Introduction The wind and buoyantly driven general circulation is a highly time-dependent entity. In addition to internal modes of variability, for example, generated by mean flow instability, the large scale is subject to variable forcing in both momentum and heat fluxes. The ocean, when faced with changing conditions, responds with planetary waves that facilitate its adjustment. In many situations, these propagators take the form of long, nondispersive, baroclinic planetary waves of

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Mark R. Schoeberl, Marvin A. Geller, and Susan K. Avery

FEBRUARY 1979 N O T E S A N D C O R R E S P O N D E N C E 365NOTES AND CORRESPONDENCEThe Structure of Stationary Planetary Waves in Winter: A Correction MARK R. SCHOEBERL Naval Research Laboratory, Washington, DC 20375 MARWN A. GELLERRosenstiel School of Marine and Atmospheric Science, University of Mia~ni, Miami, FL 33149 SUSAN r. AVERY

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Charles A. Lin

NOVEMBER 1980 CHARLES A. LIN 2373- Eddy Heat Fluxes and Stability of Planetary Waves. Part I1CHARLES A. LIN'Canadian Climate Centre, Downsview, Ontario, Canada M3H 5T4(Manuscript received 21 February 1980, in final form 14 August 1980)ABSTRACTThe stability analysis of baroclinic Rossby waves in a zonal shear flow examined in Part I is appliedto the atmosphere. The basic state consists of a planetary-scale (wavenumber 1) Rossby wave in a zonalflow with vertical shear close to the minimum

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Jeffery L. Hollingsworth and Jeffrey R. Barnes

428JOURNAL OF THE ATMOSPHERIC SCIENCESVow.. $3, No. 3Forced Stationary Planetary Waves in Mars's Winter Atmosphere JEPFERY L. HOLLINGSWORTHNA,~A/Ames Research Center, Moffett Fiegd, California $.~F'~'R~y R. BArn, mSCollege of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon(Manuscript received g October 1993, in final form 10 August 1995)ABSTRACT Mariner 9 and Viking spacecraft observations provided evidence for planetary-scale, wavelike

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Kaoru Sato, Takenari Kinoshita, and Kota Okamoto

several months to years) and the shallow branch is fast (time scales of days to a few months). The shallow branch is mainly driven by synoptic-scale waves and partly by gravity waves ( Plumb 2002 ; Miyazaki et al. 2010 ), while the deep branch is mainly by planetary waves ( Plumb 2002 ) and partly by gravity waves ( Okamoto et al. 2011 ). So far, the BDC has been examined mainly in the 2D meridional cross section. However, there are several studies indicating that the BDC has zonally asymmetric

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Rolando R. Garcia

1 JUNE 1991 P, OLANDO R. GARC1A 1405Parameterization of Planetary Wave Breaking in the Middle Atmosphere ROLANDO R. GARCIANational Center for Atmospheric Research, * Boulder, Colorado(Manuscript received 30 April 1990, in final form 14 January 1991)ABSTRACT A parameterization of planetary wave breaking in the middle atmosphere has been developed and tested ina numerical model which

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Dehai Luo and Wenqi Zhang

onset of blocking, indicating that a blocking might serve as the initial trigger for the upward propagation of planetary waves ( O’Neill and Taylor 1979 ; Quiroz 1986 ; Martius et al. 2009 ; Colucci and Kelleher 2015 ). Thus, blocking events are, to some extent, precursors to sudden stratospheric warming (SSW) events ( Martius et al. 2009 ) via increasing upward wave activity pseudomomentum to the stratosphere ( Lubis et al. 2018 ; Nakamura et al. 2020 ). The weak background westerly wind has

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Sonja Gisinger, Andreas Dörnbrack, Vivien Matthias, James D. Doyle, Stephen D. Eckermann, Benedikt Ehard, Lars Hoffmann, Bernd Kaifler, Christopher G. Kruse, and Markus Rapp

information about the various datasets used in this study. In section 3 , we discuss specific tropospheric flow regimes and forcing conditions during DEEPWAVE. Section 4 is devoted to the tropopause layer. The stratospheric and mesospheric wind and thermal conditions providing the ambient atmospheric profiles for deep propagating gravity waves are described in section 5 . There, planetary wave activity and its impact on the location of the PNJ and the polar vortex are discussed. Special attention is

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Roxana C. Wajsowicz

APIUL1986 ROXANA C. WAJSOWICZ 773Free Planetary Waves in Finite-Difference Numerical Models ROXANA C. WAJSOWICZ*Geophysical Fluid Dynamics Program, Princeton University, Princeton, NJ 08540(Manuscript received 26 October 1984, in final form 16 October 1985)ABSTRACT The effects of spatial finite-differencing, viscosity and diffusion on unbounded planetary waves in numericalmodels are

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Jay S. Winston

522JOURNAL OF METEOROLOGYVOLUME 17SOME NEW DATA ON THE LONGITUDINAL DIMENSIONS OF PLANETARY WAVES Jay S. WinstonU. S. Weather Bureau, Washington, D. C.(Original manuscript received 21 March 1960)ABSTRACTStatistics of planetary wave number and wave length as observed on 5-day mean 700-mb charts are presented for each ten degrees of latitude between 30N and 70N for each month of the year. These statisticsshow that there tend to be fewer waves around latitude circles in the colder

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