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Josef Schäfer

Ju~1979 NOTES AND CORRESPONDENCE 1117NOTES AND COrrESPONDENCEA Space-Time Analysis of Tropospheric Planetary Waves in the Northern Hemisphere Jos~.rRadioastronomical Institute, University of Bonn, Bonn, West Germany 15 September 1978 and 13 February 1979ABSTRACT The propagation of planetary waves at the 500 mb level is investigated by applying an

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William J. Randel, Byron A. Boville, and John C. Gille

3092 JOURNAL OF THE ATMOSPHERIC SCIENCES VOL. 47, NO. 24Observations of Planetary Mixed Rossby-Gravity Waves in the Upper StratosphereWILLIAM J. RANDEL, BYRON,A. BOVILLE AND JOHN C. GILLENational Center for Atmospheric Research, * Boulder, Colorado(Manuscript received 10 February 1990, in final form I August 1990) ABSTRACT Observational evidence is presented for planetary scale (zonal wave number

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Bo Christiansen

) found a convincing bimodality in the distribution of anomaly correlations of the stratospheric zonal mean wind. We will comment on the latter result in the discussion. An early and much cited observation of bimodality in the extratropical atmospheric variability was presented in papers by Hansen and Sutera ( Sutera 1986 ; Hansen 1986 ; Hansen and Sutera 1986 ), who studied a planetary-scale atmospheric wave amplitude index (WAI). It is a particular strength of these studies that they are based on

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Hitoshi Mukougawa, Shunsuke Noguchi, Yuhji Kuroda, Ryo Mizuta, and Kunihiko Kodera

1. Introduction Recently, Kodera et al. (2008) revealed observational evidence of downward-propagating planetary waves from the stratosphere into the troposphere just after a stratospheric sudden warming (SSW) event in early March 2007. Based on a detailed analysis of the three-dimensional propagation of the planetary-scale wave packet, they showed that the wave packet incoming from the troposphere over Eurasia gradually deflects eastward and then propagates downward into the troposphere over

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Ben-Da Lin

1206 3OURNAL OF THE ATMOSPHERIC SCIENCES VOLUME39The Behavior of Winter Stationary Planetary Waves Forced by Topography and Diabatic Heating~ BEN-DA LIN2Department of Atmospheric Sciences, University of Washington, Seattle 98195(Manuscript received 13 October 1981, in final form 25 February 1982)ABSTRACT A primitive equation linear wave model is developed to examine the

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Ping Chen and Walter A. Robinson

1078 JOURNAL OF THE ATMOSPHERIC. SCIENCES VOL. 48, NO. 8The Effects of Transience on the ProPagation of Stratospheric Planetary Waves PING CHEN AND WALTER A. ROBINSONDepartment of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois(Manuscript received 1 May 1990, in final form 15 November 1990)ABSTRACT The propagation of planetary.scale Rossby waves in the

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Christian Hauck and Volkmar Wirth

1. Introduction Linear quasigeostrophic theory on a hemisphere has sucessfully been applied to describe the vertical and meridional propagation of quasistationary planetary waves in the stratosphere (e.g., Matsuno 1970 , 1971 ; Karoly and Hoskins 1982 ; Wirth 1991 ; Braesicke 1994 ). The model was first formulated by Matsuno (1970) . Given a zonal mean basic state and some forcing at the tropopause level, Matsuno’s model yields the wave structure throughout the stratosphere. Overall, the

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Y. Hayashi and D. G. Golder

2068 JOURNAL OF THE ATMOSPHERIC SCIENCES VOt~UM~35The Generation of Equatorial Transient Planetary Waves: ControlExperiments with a GFDL General Circulation Model Y. HAY^sin ^sD D. G. G~nDX~ Geophysical Fluid Dynamics Laboratory, NOAA, Princeton University, Princeton, NJ 08540 (Manuscript received 1 May 1978, in final form 21 July 1978)ABSTRACT In order to study the generation of transient

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John R. Albers and Terrence R. Nathan

example, several authors (e.g., Coy et al. 1997 ; Newman et al. 2001 ; Hu and Tung 2003 ) have suggested a positive dynamical feedback mechanism in which observed high-latitude NH late winter and early spring cooling due to ozone loss strengthens the polar vortex. The strengthened polar vortex reduces the vertical propagation of planetary waves ( Charney and Drazin 1961 ), resulting in further cooling and thus further strengthening of the vortex. This view is supported by chemistry–coupled climate

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Dehai Luo

) . However, many investigators have documented a frequent coincidence of planetary-scale traveling waves and blocking in Northern Hemisphere data ( Austin 1980 ; Lejenäs and Döös 1987 ; Lejenäs and Madden 1992 ). Lindzen et al. (1984) speculated that slowly propagating Rossby waves could contribute to persistent anomalies. Dole (1986) found a tendency for retrogression of waves 1 and 2 in the 500-hPa height field before a major amplification. In an energetic analysis in the wavenumber domain of

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