Table of Contents - The Atmospheric Studies Group at TRC

Section 9: CALPUFF
Table 9-32 (Continued)
Boundary Condition File (BCON.DAT)
INPUT GROUP: 3 -- Air-Mass Types (Constant or factored variation)
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-------------
Subgroup (3a)
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a
AIR-MASS DEFINITION
--------------------
b
c
Type Top of Pollutant
No. Layer Concentration(s)
(m)
------ ---------- -------------------------------------
! AIRMASS = clean !
! X = 1, 3000., 1.1, 1.2, 1.3, 1.4, 1.5 ! !END!
! AIRMASS = urban !
! X = 3, 1500., 5.1, 5.2, 5.3, 5.4, 5.5 ! !END!
! AIRMASS = model !
! X = 4, 3000., 2.1, 2.2, 2.3, 2.4, 2.5 ! !END!
--------
a
Data for each air-mass type are treated as a separate input subgroup
and therefore must end with an input group terminator.
b
An INTEGER from 1 to NTYPEBC1+NTYPEBC2, with no duplications; used
for mapping air-mass types to boundary of computational grid.
c
A concentration must be entered for every species listed in Group 2,
and in the order presented in Group 2.
Units are specified by IBCU (e.g. 1 for g/m**3).
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Subgroup (3b)
-------------
a
VARIABLE AIR-MASS FACTORS
--------------------------
Use this subgroup to describe temporal variations in the concentrations
for one or more air-mass types given in Group 3a. Factors entered multiply
the concentrations in Group 3a. Skip air-mass type / species combinations
that have constant concentrations. For more elaborate variations in
air-mass properties, provide specific records in Input Group 5.
IVARY determines the type of variation, and is air-mass specific:
(IVARY) Default: 0
0 = Constant
1 = Diurnal cycle (24 scaling factors: hours 1-24)
2 = Monthly cycle (12 scaling factors: months 1-12)
3 = Hour & Season (4 groups of 24 hourly scaling factors,
where first group is DEC-JAN-FEB)
4 = Speed & Stab. (6 groups of 6 scaling factors, where
first group is Stability Class A,
and the speed classes have upper
bounds (m/s) defined in Group 12
5 = Temperature (12 scaling factors, where temperature
9-201