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Murry L. Salby, Donal O'Sullivan, Rolando R. Garcia, and Patrick Callaghan

15M^Y 1990 SALBY, O'SULLIVAN, GARCIA AND CALLAGHAN 1179Air Motions Accompanying the Development of a Planetary Wave Critical Layer MURRY L. SALBY*Department of Astrophysical, Planetary, and Atmospheric Sciences, University of Colorado, Boulder, Colorado DONAL O'SULLIVANCenter for Atmospheric Theory and Analysis, University of Colorado, Boulder, Colorado ROLANDO R

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Murry L. Salby

( Brewer 1949 ; Dobson 1956 ; Murgatroyd and Singleton 1961 ). The residual circulation is driven by planetary waves that transmit momentum upward from the troposphere. When absorbed, that momentum drives a poleward drift, which converges at high latitude to force mean downwelling. The accompanying adiabatic warming maintains Arctic temperature as warmer and the polar-night vortex as weaker than each would be under conditions of radiative equilibrium. Compensating that vertical motion at lower

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Masato Shiotani

3200 JOURNAL OF THE ATMOSPHERIC SCIENCE'S VOL. 43, NO. 24 Planetary Wave Activity in the Troposphere and Stratosphere during the Northern Hemisphere Winter MASATO SHIOTANI* NationM Center for Atmospheric Research,** Boulder, CO 80307 (Manuscript received 17 February 1986, in final form 29 July 1986) This paper describes the

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Judith Berner

nonlinear processes. Certainly, a more accurate representation of nonlinear processes would be desirable, but is hampered by the data requirements posed by the estimation of a high-dimensional nonlinear operator. On the other hand, a number of studies have suggested that tropospheric planetary wave behavior is fundamentally nonlinear ( Legras and Ghil 1985 ; Hansen and Sutera 1986 ; Itoh and Kimoto 1999 ). These have been motivated by the highly truncated planetary wave theory of Charney and DeVore

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William J. Randel

VOL. 44, NO. 6 JOURNAL OF THE ATMOSPHERIC SCIENCES 15 MARCH 1987A Study of Planetary Waves in the Southern Winter Troposphere and Stratosphere. Part I: Wave Structure and Vertical Propagation WILLIAM J. RANDELNational Center for Atmospheric Research,* Boulder, CO 80307(Manuscript received 2 January 1986, in final form 25 August 1986) Planetary wave propagation in the southern winter troposphere

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Jun-Ichi Yano and Joseph J. Tribbia

concludes with further discussion in section 5 . 2. Theoretical considerations How can we, then, explain the MJO in terms the dry dynamics? Under the linear limit, the large-scale tropical atmospheric dynamics consists of a set of the equatorial waves ( Matsuno 1966 ; Yano and Bonazzola 2009 ). Thus, if the MJO is to be explained in terms of the linear dynamics, it must be explained in terms of the slowest-propagating equatorial planetary-scale waves: the Kelvin or the Rossby wave. At first sight, the

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Christian Franzke, Andrew J. Majda, and Grant Branstator

1. Introduction The driving forces and dominant functional form of planetary wave dynamics is an important topic in recent literature. Depending on the school of thought, planetary wave dynamics are either dominated by deterministic linear dynamics that are driven by additive white noise ( Penland and Sardeshmukh 1995 ; Newman et al. 1997 ; Branstator and Haupt 1998 ; Branstator and Frederiksen 2003 ) or are intrinsically nonlinear. The latter view is motivated by studies of highly truncated

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Anthony D. Del Genio and William B. Rossow

I FEBRUARY 1990 ANTHONY D. DEL GENIO AND WILLIAM B. ROSSOW 293Planetary-Scale Waves and the Cyclic Nature of Cloud Top Dynamics on Venus ANTHONY D. DEL GENIO AND WILLIAM B. ROSSOWNASA/Goddard Space Flight Center, Institute for Space Studies, New York, New York(Manuscript received I January 1989, in final form 3 August 1989) ABSTRACT Pioneer Venus OCPP ultraviolet images spanning

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Y. Orsolini and P. Simon

VOL. 52, NO. 22 JOURNAL OF THE ATMOSPHERIC SCIENCES 15NOVEMBER 1995Idealized Life Cycles of Planetary-Scale Barotropic Waves in ~he Middle Atmosphere Y. ORSOLINI AND P. SIMONMdtdo-France, Centre National de Recherches Mdtdorologiques, Toulouse, France(Manuscript received 3 November 1993, in final form 10 March 1994)ABSTRACT A nonlinear nondivergent barotropic model is used to

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Grant Branstator and Judith Berner

1. Introduction a. Background Depending on the body of scientific papers one reads and the emphasis of the techniques they employ, one can either conclude that tropospheric planetary wave behavior is largely understandable in terms of linear dynamics or that these waves are fundamentally nonlinear. Given this situation one might guess that both views have some merit and that it would be helpful to have a means of quantifying the relative contributions of the two types of dynamics to planetary

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