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Table of Contents - The Atmospheric Studies Group at TRC

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Section 1: Introduction<br />

<strong>Table</strong> 1-2:<br />

Major Fe<strong>at</strong>ures <strong>of</strong> the CALPUFF Model<br />

• Source types<br />

Point sources (constant or variable emissions)<br />

Line sources (constant or variable emissions)<br />

Volume sources (constant or variable emissions)<br />

Area sources (constant or variable emissions)<br />

• Non-steady-st<strong>at</strong>e emissions and meteorological conditions<br />

Gridded 3-D fields <strong>of</strong> meteorological variables (winds, temper<strong>at</strong>ure)<br />

Sp<strong>at</strong>ially-variable fields <strong>of</strong> mixing height, friction velocity, convective velocity scale,<br />

Monin-Obukhov length, precipit<strong>at</strong>ion r<strong>at</strong>e<br />

Vertically and horizontally-varying turbulence and dispersion r<strong>at</strong>es<br />

Time-dependent source and emissions d<strong>at</strong>a<br />

• Efficient sampling functions<br />

Integr<strong>at</strong>ed puff formul<strong>at</strong>ion<br />

Elong<strong>at</strong>ed puff (slug) formul<strong>at</strong>ion<br />

• Dispersion coefficient (σ y , σ z ) options<br />

Direct measurements <strong>of</strong> σ v and σ w<br />

Estim<strong>at</strong>ed values <strong>of</strong> σ v and σ w based on similarity theory<br />

PDF tre<strong>at</strong>ment <strong>of</strong> dispersion in convective boundary layers<br />

Pasquill-Gifford (PG) dispersion coefficients (rural areas)<br />

McElroy-Pooler (MP) dispersion coefficients (urban areas)<br />

CTDM dispersion coefficients (neutral/stable)<br />

• Vertical wind shear<br />

Puff splitting<br />

Differential advection and dispersion<br />

• Plume rise<br />

Partial penetr<strong>at</strong>ion<br />

Buoyant and momentum rise<br />

Stack tip effects<br />

Vertical wind shear<br />

Building downwash effects<br />

• Building downwash<br />

Huber-Snyder method<br />

Schulman-Scire method<br />

PRIME method<br />

(Continued)<br />

1-26

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