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T. Duncan, A. Fairlie, Richard E. Turner, and David E. Siskind

OCTOBER 1994 FAIRLIE ET AL. 2363Transport Characteristics of a Finite-Difference Dynamics Model Combined with a Spectral Transport Model of the Middle Atmosphere T. DUNCAN A. FAIRLIEScience and Technology Corporation, Hampton, Virginia RICHARD E. TURNER AND DAVID E. SISKIND*NASA Langley Research Center, Hampton, Virginia(Manuscript received 29 September 1993, in final form 28

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564.. __ - ... " - .~, .. ..MONTHLY WEATHER REVIEW Vol. 99, No. 7UDC 161.616.8:161.~.2:161.~ RESPONSE OF A MIDDLE-LATITUDE MODEL ATMOSPHERE TO FORCINGBY TOPOGRAPHY AND STATIONARY HEAT SOURCES JACQUES DEROMEMeteorological Service of Canada, Montreal, QuebecA. WIIN-NIELSENDepartment of Meteorology and Oceanography, The University of Michigan, Ann Arbor, Mich.ABSTRACT The middle-latitude standing wave problem is investigated by means of a quasi-geostrophic, linear, steady

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Stephen D. Eckermann, Jun Ma, Karl W. Hoppel, David D. Kuhl, Douglas R. Allen, James A. Doyle, Kevin C. Viner, Benjamin C. Ruston, Nancy L. Baker, Steven D. Swadley, Timothy R. Whitcomb, Carolyn A. Reynolds, Liang Xu, N. Kaifler, B. Kaifler, Iain M. Reid, Damian J. Murphy, and Peter T. Love

Wave Experiment (DEEPWAVE): An airborne and ground-based exploration of gravity wave propagation and effects from their sources throughout the lower and middle atmosphere . Bull. Amer. Meteor. Soc. , 97 , 425 – 453 , . 10.1175/BAMS-D-14-00269.1 Fritts , D. C. , and Coauthors , 2018 : Large-amplitude mountain waves in the mesosphere accompanying weak cross-mountain flow during DEEPWAVE research flight RF22 . J. Geophys. Res. , in press . 10

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Richard A. Anthes

1306 MONTHLY WEATHER REVIEW VOLUME 111REVIEWRegional Models of the Atmosphere in Middle Latitudes RICHARD A. ANTHESNational Center for Atmospheric Research~, Boulder, CO 80307(Manuscript received 27 November 1982; in final form 23 February 1983) ABSTRACT This review describes recent development in operational and research limited-area numerical

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264 MONTHIJY WEATHER REVIEW. JUNE, 1904ON THE GENERAL UIRCULBTION OF THEl ATMOSPHERE IN MIDDLE AND HIGHER LATITUDES.By W. N. SHAW F. R. 8. Becretary of the Meteorological Council. Received Mag 16; and &ad June b, 1904, before the Royal Society, London, England.I n the course of an investigation into the trajectories, oractual paths of air, by means of synoptic charts, which is stillin progress, it became apparent that the paths of air takingpart in cyclonic disturbances near the British

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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

tropospheric jet streams generate vertically propagating gravity waves in the troposphere and lower stratosphere ( Smith 1979 ; Gill 1982 ; Baines 1995 ; Fritts and Alexander 2003 ; Nappo 2012 ; Sutherland 2010 ; Plougonven and Zhang 2014 ). Through their far-field interactions, gravity waves constitute an important coupling mechanism in Earth’s atmosphere. The associated redistribution of momentum and energy controls the global middle-atmospheric circulation ( Dunkerton 1978 ; Lindzen 1981 ). To

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Joseph L. Sabutis

MONTHLY WEATHER REVIEWVOLUME 122 NOTES AND CORRESPONDENCEThe Choice of a Vertical Grid for a 2.5D Numerical Model of the Middle Atmosphere JOSEPH L. SABUTISDepartment of Atmospheric Sciences, University' of California, Los Angeles, Los Angeles, Califorttia18 October 1993 and il April 1994ABSTRACT The consequences of choosing an unstaggered grid (UG), Charney-Phillips-type grid (CPG), or Lorenztype grid (LO) in the vertical for a 2.5D model are examined

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III. Effects of Increased Horizontal Computational Resolution


dissipation from thatof the source of eddy kinetic energy.The analysis of the energetics in wave number space clearly demonstrates the differences between t,he energeticsof the different parts of the atmosphere. In middle latitudes there are essent,ial differences between the energeticsof the model t,roposphere and t,hat of the model st>ratosphere. In the model troposphere, the eddy kinetic energy isproduced by the conversion of eddy potential energy in the range of wave numbers from 2 to 8. Part of t

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Syukuro Manabe and Douglas G. Hahn

profile of zonal mean decay time scale of theactual atmosphere. In general the decay time scale in middle latitudes of the model is much less than in polar regions.From winter to summer, this region of minimumpersistence extends poleward. Qualitatively, a similar feature is evident in the observed distributionsexcept that the persistence of the model is slightlyless than observed at nearly all troposphericlevels in middle and high latitudes. In tropical regions, from 20-N to 20-S, decaytime

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Peter Zwack and Mustapha Kabil

-geostrophic divergence (7) isdominated by the local geostrophic vorticity tendency,which is proportional to its surface value, i.e., the Laplacian of the surface pressure tendencies. One of the reasons why the proposed method, although based on quasi-geostrophic theory, requiresvirtually no explicit information on the usual forcingterms in the middle and upper troposphere is that thesurface geostrophic vorticity tendency already containsthe integrated (through the entire atmosphere) effectsof all the standard

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