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chatt C Williamson


Click on the titles below to find US government-authored or -collected reports written by chatt C Williamson

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Power Spectral Densities of Atmospheric Aerosol Particle Counts Jan 2010 32 pages
Authors:  chatt C Williamson; Steven C Hill; Dennis M Garvey; Michael L Larsen; Cheryl L Klipp; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD COMPUTATIONAL AND INFORMATION SCIENCES DIR
The full text of this report is available for sale.The velocity components of the atmospheric wind typically have a power spectral density (PSD) with a slope of -5/3 in an inertial subrange of frequencies, roughly from 0.01 to 10 Hz depending on the wind speed and stability. As passive scalars, atmospheric temperature and humidity have a relatively small direct effect on the winds, and they also typically have a -5/3 slope in this frequency range. Atmospheric aerosol particles are ...


Evaluation of a High Resolution Wind Model Over a Complex Terrain Surface Apr-2009 45 pages
Authors:  Sam S Chang; Dennis M Garvey; chatt C Williamson; Giap Huynh; ARMY RESEARCH LAB ADELPHI MD
The full text of this report is available for sale.A complete and comprehensive description of the high resolution wind (HRW) model is presented. The HRW model has been in development at the U.S. Army Research Laboratory, formerly U.S. Army Atmospheric Sciences Laboratory, since 1978. This model is a two-dimensional, diagnostic atmospheric surface-layer wind model with a horizontal grid spacing of the order of 100 m over a domain of about 5 by 5 km. It uses Gauss? principle of ...


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