Table of Contents - The Atmospheric Studies Group at TRC
Table of Contents - The Atmospheric Studies Group at TRC Table of Contents - The Atmospheric Studies Group at TRC
Section 9: CALPUFF *ZISPLIT real Split is allowed only if last hour's mixing height (m) exceeds this minimum value *ROLDMAX real Split is allowed only if ratio of last hour's mixing ht to the maximum mixing ht experienced by the puff is less than this maximum value (this postpones a split until a nocturnal layer develops) 100.0 0.25 (Horizontal Puff-Spliting Control Variables *) *NSPLITH integer Number of puffs that result every time a puff is split - nsplith=5 means that 1 puff splits into 5 *SYSPLITH integer Minimum sigma-y (Grid Cells Units) of puff before it may be split *SHSPLITH integer Minimum puff elongation rate (SYSPLITH/hr) due to wind shear, before it may be split Table 9-3 (Continued) CALPUFF Control File Inputs - Input Group 12 Dispersion and Computational Parameters 5 1.0 2.0 Variable Type Description Default Value *CNSPLITH (mxspec) integer array Minimum concentration (g/m 3 ) of each species in puff before it may be split. Enter array of NSPEC values; if a single value is entered, it will be used for ALL species 1.0E-07 (Integration Control Variables *) *EPSSLUG real Fractional convergence criterion for numerical slug sampling integration *EPSAREA real Fractional convergence criterion for numerical area source integration *DSRISE real Trajectory step length (m) for numerical rise integration. 1.0E-04 1.0E-06 1.0 (Boundary Condition Puff Control Variables *) *HTMINBC real Minimum height (m) to which BC puffs are mixed as they are emitted (MBCON=2 ONLY). Actual height is reset to the current mixing height at the release point if greater than this minimum. 500. *RSAMPBC real Search radius (km) about a receptor for sampling nearest BC puff. BC puffs are typically emitted with a spacing of one grid cell length, so the search radius should be greater than DGRIDKM. 10. 9-90
Section 9: CALPUFF *MDEPBC integer Near-Surface depletion adjustment to concentration profile used when sampling BC puffs 1 0 = Concentration is NOT adjusted for depletion 1 = Adjust Concentration for depletion 9-91
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Section 9: CALPUFF<br />
*MDEPBC integer Near-Surface depletion adjustment to concentr<strong>at</strong>ion<br />
pr<strong>of</strong>ile used when sampling BC puffs<br />
1<br />
0 = Concentr<strong>at</strong>ion is NOT adjusted for depletion<br />
1 = Adjust Concentr<strong>at</strong>ion for depletion<br />
9-91
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