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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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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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J. C. Alpert and S. K. Avery

OCTOBER 19~3 J.C. ALPERT, M. A. GELLER AND S. K. AVERY 2467'The Response of Stationary Planetary Waves to Tropospheric Forcing~ J. C. ALPERT AND M. A. GELLERLaboratory for Planetary Atmospheres, NASA/Goddard Space Flight Center, Greenbelt, MD 20771 S. K. AVERY2Department of Electrical Engineering, University of Illinois, Urbana 61801(Manuscript received 2 February 1983, in final

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James R. Holton

I DECEMBER 1984 NOTES AND CORRESPONDENCE 3427NOTES AND CORRESPONDENCEThe Generation of Mesospheric Planetary Waves by Zonally Asymmetric Gravity Wave Breaking~ JAMES R. HOLTON Department of.4tmospheric Sciences, University of Washington, Seattle WA 98195 2 June 1984 and 17 September 1984 ABSTRACT A semi-spectral numerical model is used to

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Christopher C. Walker and Gudrun Magnusdottir

1. Introduction This paper investigates whether nonlinear planetary wave reflection plays a role in establishing longitudinal asymmetries in the time-mean circulation of the wintertime extratropical troposphere. It has long been known that longitudinal asymmetries are produced by planetary waves excited by the earth's topography and by quasi-stationary longitudinal variations in heating ( Charney and Eliassen 1949 ; Smagorinsky 1953 ). As shown in Charney and Eliassen (1949) and in a number

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J. F. Scinocca and P. H. Haynes

1. Introduction There is strong evidence that much of the planetary wave activity observed in the wintertime stratosphere is excited in the troposphere (e.g., Randel 1987 and references therein). The most obvious tropospheric sources of planetary waves are associated with geographical asymmetries such as topography and spatially inhomogeneous heating (primarily due to land–sea contrasts). Stationary planetary wave patterns in the wintertime stratosphere are primarily due to these geographical

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Walter A. Robinson

15 DECEMBER 1986 WALTER A. ROBINSON 3109The Behavior of Planetary Wave 2 in Preconditioned Zonal Flows WALTER A. ROBINSONDepartment of Atmospheric Sciences, University of Washington, Seattle, WA 98195(Manuscript received 19 March 1986, in final form 14 July 1986)ABSTRACT The response of linear planetary wave 2 to changes in the isentropic zonally symmetric distribution of potentialvorticity (PV) is investigated

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