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Richard D. Thomas Jr. and David D. Houghton

DECEMBER 1979 RICHARD D. THOMAS, JR., AND DAVID D. HOUGHTON 1589The Relationship between Cold-Frontal Radar Echoes and Selected Surface Kinematic Parameters RICHARD D. THOMAS, JR.lSystems Development Office, National Weather Service, NOAA, Silver Spring, MD 2~910 DAVID D. HOUGHTONDepartment of Meteorology, University of Wisconsin. Madison 53706(Manuscript received I February 1979, in

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Sarah A. Tessendorf, L. Jay Miller, Kyle C. Wiens, and Steven A. Rutledge

1. Introduction The Severe Thunderstorm Electrification and Precipitation Study (STEPS) was established “to achieve a better understanding of the interactions between kinematics, precipitation production, and electrification in severe thunderstorms on the High Plains” ( Weisman and Miller 2000 ). The field campaign took place from 17 May to 20 July 2000 near Goodland, Kansas. An overview of the STEPS field program can be found in Lang et al. (2004) . STEPS research aims to identify

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Phillip J. Smith and Chao Ping Lin

DECEMBER1978 PHILLIP J. SMITH AND CHAO PING LIN 1687A Comparison of Synoptic-Scale Vertical Motions computed by theKinematic Method and Two Forms of the Omega EquationPHILLIP J. SMITH AND CHAO PING LINDepartment of Geosciences, Purdue University, West Lafayette, IN 47907(Manuscript received 17 February, in final form 24 August 1978)ABSTRACT A comparison is made between the kinematic method, the quasi

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Mark D. Powell

APRIL 1990 MARK D. POWELL 891Boundary Layer Structure and Dynamics in Outer Hurricane Rainbands. Part I: Mesoscale Rainfall and Kinematic Structure MARK D. POWELLNOAA Hurricane Research Division, AOML, Miam- Florida(Manuscript received 21 March 1989, in final form 9 November 1989)ABSTRACT Results of hurricane boundary layer experiments conducted in outer rainbands of

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Maria Valdivieso Da Costa, Herlé Mercier, and Anne Marie Treguier

1. Introduction Kinematic subduction rate diagnostics are a widely used tool for the description of processes that couple the dynamics of the mixed layer and the ocean interior. This paper is concerned with some uncertainties that influence such calculations. The problem is to predict the annual rate of water-mass subduction at which fluid escapes irreversibly into the main thermocline from the kinematic relationship between the velocity field and the mixed layer depth. Stommel (1979) was the

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Binson Joseph and Bernard Legras

kinematic boundary. The mapping of the lobes L 1 – L 4 described above generates a turnstile across the kinematic boundary with the fluid in lobes L 1 and L 4 changing side over a period T ( Mackay et al. 1984 ; Rom-Kedar et al. 1990 ). This approach is well suited to periodic or quasiperiodic flows and has been applied in several instances to simplified models of geophysical fluid dynamics (see, e.g., Duan and Wiggins 1996 ; del Castillo-Negrete 1998 ; Koh and Plumb 2000 ). However, one

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Bart Geerts and Jordan I. Christian

1. Introduction Field campaigns studying precipitation systems, such as the Mesoscale Alpine Project (MAP) ( Rotunno and Houze 2007 ) or the International H 2 O Project (IHOP_2002) ( Weckwerth et al. 2004 ), typically are rich in kinematic information from Doppler radar systems, but relatively poor in thermodynamic information. The same applies to operational weather networks: Doppler velocity data are available at a resolution of 1–2 km (spatially) and 5–10 min (temporally) across much of the

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K. A. Browning and R. Wexler

FEBRUARY 1968 K. A. B R O W N I N G A N D R. W E X L E R 105The Determination of Kinematic Properties of a Wind Field Using Doppler Radar~ K. A. BROWNrNG2 Air Force Cambridge Research Laboratories, Sudbury, Mass. ~) R. WEXLERAllied Research Associates, Inc., Concord, Mass.(Manuscript received 27 July, in revised form 2 November 1967)ABSTRACT A technique is proposed for the

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Paul A. O’Gorman and Tapio Schneider

, we postpone dynamical questions and focus on the kinematics of moisture transport and condensation. While this considerably simplifies the problem, moisture statistics are nonetheless difficult to calculate because condensation introduces a strong nonlinearity into the specific humidity evolution equation. Various approaches have been proposed to parameterizing the mean moisture flux and mean condensation rate—the principal unclosed terms in the evolution equation for mean specific humidity

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Christopher J. Schultz, Lawrence D. Carey, Elise V. Schultz, and Richard J. Blakeslee

studies relied on the observed connection between kinematics, microphysics, and electrification within thunderstorms via the noninductive charging mechanism (e.g., Takahashi 1978 ; Saunders et al. 2006 ). Electrification within thunderstorms is found to occur on the order of the quarter- to half-life of an ordinary thunderstorm. 2 Research shows that initial electrification in the primary development of thunderstorms is approximately 10–15 min (e.g., Dye et al. 1986 ; Bringi et al. 1997

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