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Thomas R. Parish and Kenneth T. Waight III

2214 MONTHLY WEATHER REVIEW VOLUI~II5The Forcing of Antarctic Katabatic Winds THOMAS R. PARISH AND KENNETH T. WAIGHT IIIDepartment of Atmospheric Science, University of Wyoming. Laramie. WY'82071(Manuscript received 3 June 1986, in final form 2 March 1987) The temporal and spatial development of katabafic winds along an idealized slope representative of

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Rosemary Auld Miller and William M. Frank

MONTHLY WEATHER REVIEW VOLUME I21Radiative Forcing of Simulated Tropical Cloud Clusters ROSEMARY AULD MILLER AND WILLIAM M. FRANK Department of Meteorology, The Pennsylvania State University, University Park, Pennsylvania (Manuscript received 15 November 1991, in final form 25 May 1992) ABSTRACT A number of field experiments and subsequent studies in the 1970s and 1980s have led to the belief

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Li Dong and Stephen J. Colucci

events through case study and composite analysis so as to extensively evaluate the NQG forcings to SH blocking onsets. The remainder of this study is organized as follows. A detailed explanation of the NQG wind tendency equation is presented in section 2 . The datasets and criteria for blocking onset detection are described in section 3 . The role of geostrophic advection of ageostrophic relative vorticity in block onset is discussed in section 4 for selected blocking events, and section 5 for

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Marcus Thatcher and John L. McGregor

operate at a resolution of 60 km or finer. RCMs simulate atmospheric dynamics and physics using modeling techniques similar to those used in GCMs, but with enhancements for modeling mesoscale and local-scale meteorology. In addition, RCMs use high-resolution orography and land-use datasets to account for regional surface forcings that are not resolved by GCMs since these surface forcings can have a significant influence on the atmosphere within the planetary boundary layer. It is also necessary for

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PETER J. WEBSTER

Remote Forcing of the Time-IndependentTropical AtmospherePETER J. WEBSTER "Commonwealth Meteorology Research Centre, Melbourne, AustraliaABSTRACT-An analysis is made of low-latitude, large-scale, zonally asymmetric motions that result from theinfluence of stationary extratropical disturbances. A linear,two-layer, primitive-equation model in spherical coor-dinates with parameterized dissipation and realistic basicflows is used. IMidlatitude effects are included by applyingconditions at the

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PETER J. WEBSTER

continuous stratifiedatmosphere in solid westward rotation with no dissipation.Of all the modes, only the rotationally trapped Kelvinwave exhibits a significant response. Because the Kelvinwave response does not compare well with the observedflow, we concluded that the neighboring westerlies in thereal atmosphere are important even if the forcing is inlow latitudes.The second linear model is a two-layer numericalmodel including parameterized dissipation and realisticbasic currents. Realistic forcing is

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Ronald M. Errico

2734 MONTHLY WEATHER REVIEW VOLUM-117The Forcing of Gravitational Normal Modes by Condensationai Heating RONALD M. ERRICONational Center .for Atmospheric Research,* Boulder, Colorado(Manuscript received 3 January 1989, in final form 28 June 1989) Time series of normal mode coefficients ~ere determined by projection of data produced at every time stepfor 64 days of a long climate simulation

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J. C. Doran and E. D. Skyllingstad

MAY I992 DORAN AND SKYLLINGSTAD -o~.'~Multiple-Scale Terrain Forcing of Local Wind Fields J. C. DORAN AND E. D. SKYLLINGSTAD Pacific Northwest Laboratory, Richland, Washington(Manuscript received 15 April 1991, in final form 26 August 1991)ABSTRACT Observations and numerical simulations with a hydrostatic model are used to examine effects of regional andlocal terrain, synoptic forcing, and stability on the wind

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Maurice Danard, Qing Zhang, and John Kozlowski

NOVEMBER 1993 DANARD ET AL. 3173On Computing the Horizontal Pressure Gradient Force in Sigma Coordinates MAURICE DANARD, QING ZHANG, AND JOHN KOZLOWSKIDepartment of Compuler Science, University of Victoria, Victoria, British Columbia, Canada(Manuscript received 4 January 1993, in final form 1 June 1993)ABSTRACT Corby et al. present a finite-difference expression for the horizontal pressure

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Robert G. Fovell

606 MONTHLY WEATHER REVIEW VOLUME II9Influence of the Coriolis Force on Two-Dimensional Model Storms ROBERT (~. FOVELLDepartment of Atmospheric Sciences, University of Washington, Seattle, Washington(Manuscript received 3 January '1990, in final form 16 August 1990) ABSTRACT Two-dimensional model simulations were made to gage the effect of the Coriolis

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