Table of Contents - The Atmospheric Studies Group at TRC

Section 9: CALPUFF
CDIV(2) real Divergence criterion for dw/dz in met cell used to
initiate adjustment for horizontal convergence (l/s).
Partial adjustment starts at CDIV(1), and full
adjustment is reached at CDIV(2)
NLUTIBL integer Search radius (no. of cells) for nearest land and water
cells used in subgrid TIBL module
WSCALM real Minimum wind speed allowed for non-calm conditions.
Wind speeds less than WSCALM will be considered as
"calm" by the model. WSCALM is also used as the
minimum speed returned from the power law
extrapolation of the wind speed toward the surface.
Table 9-3 (Continued)
CALPUFF Control File Inputs - Input Group 12
Dispersion and Computational Parameters
0.0, 0.0
4
0.5
Variable Type Description Default Value
XMAXZI real Maximum mixing height (m) 3000.
XMINZI real Minimum mixing height (m) 50.
WSCAT(5) real array Upper bounds on the first 5 wind speed classes (m/s);
The last class has no upper limit
PLX0(6) real array Wind speed profile power-law exponents for stabilities
A-F
PTG0(2) real array Potential temperature gradient (deg. k/m) for stability
classes E and F
PPC(6) real array Default plume path coefficients for each stability class
(used when option for partial plume height terrain
adjustment is selected, MCTADJ = 3)
SL2PF real Slug-to-puff transition criterion factor (max. σ y /slug
length before transition to puff)
1.54, 3.09,
5.14, 8.23, 10.8
0.07, 0.07,
0.10, 0.15,
0.35, 0.55
.020, .035
0.50, 0.50,
0.50, 0.50,
0.35, 0.35
10.
(Vertical Puff-Spliting Control Variables *)
*NSPLIT integer Number of puffs that result every time a puff is split;
nsplit=2 means that 1 puff splits into 2
3
*IRESPLIT
(24)
integer array Time(s) of a day when split puffs are eligible to be split
once again; this is typically set once per day, around
sunset before nocturnal shear develops. 24 values: 0 is
midnight (00:00) and 23 is 11 PM (23:00) 0=do not resplit;
1=eligible for re-split
17*0, 1, 6*0
9-89