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This READ.ME file includes updates not described in the User
Instructions or in the technical report.
These comments for Releases 3-6a are presented 'newest first',
but are cumulative and, therefore, all are relevant.
The sample outputs, *.DAT, were all created under Release 6a.
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CPB-3 Release 6a (Oct. 1998) corrected integration errors in CPB03
that caused the intersection concentrations to have impacts very far
away from the intersections. These code changes in CPB03 are dated
12/13/96 but were never implemented into the U.S. version until
October 1998.
----------------------------------------------------------------------
CPB-3 Release 6 (Mar. 1994) corrected asymmetries seen in 5.0
that were due to asymmetric definitions in the turbulence. Note that
we now use the full value of the turbulence TMULT=1.0 that gave the
best fits to all data rather than the TMULT=0.5 preferred by regulators
because it gave higher concentrations.
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CPB-3 Release 5 (Apr. 1990) has been recompiled using LAHEY 4.0
FORTRAN 77 and no longer REQUIRES an 80x87 math co-processor. However,
the code will make use of the co-processor, if available.
----------------------------------------------------------------------
CPB-3 Release 5 (Jan. 1990) now allows for computations of NOX
concentrations (with an assumed molecular wt. of 46.0). Release 4
only allowed for CO (with an assumed molecular wt. of 28.0).
Sample input files CPBCONN.INP, CPBVARN.INP and the resulting
output file CPBWRITN.DAT are contained on the distribution
disk and demonstrate a NOX computation.
Release 5 also corrects a code error in the numerical integration
algorithm for near canyon-parallel wind situations.
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CPB-3 Release 4 (July 1989) now increases the number of angular
samples proportionally for sigma theta larger than 15 degrees.
Release 4 also has a substantial number of checks on the validity
of various input variables and prints out appropriate warnings.
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CPB-3 Release 3 and later also contain the option to specify
intersection concentrations in the CPBVAR.INP data file directly after
the background concentrations, as shown below.
BACKGROUND-CONCENTRATIONS IN ppm (as before)
BACKGROUND CONCENTRATIONS: 0.0 (as before)
BACKGROUND-SUBTRACTED INTERSECTION-CONCENTRATIONS IN ppm
+Y INTERSECTION CONCS: 5.0
-Y INTERSECTION CONCS: 4.0
If these extra 3 input lines are not included, the intersection
concentrations will be assumed to be ZERO as was automatically the
case in Releases 1 and 2. It is not necessary to modify Release 2
input files UNLESS you want non-zero, intersetion concentrations
above background.
Note that BACKGROUND SUBTRACTED VALUES are expected !
Note that, as always, the added text lines MUST BE SPELLED
EXACTLY AS SHOWN ! Sample input files CPBCON.INP, CPBVAR.INP and
resulting output file CPBWRIT.DAT are contained on the distribution
disk and demonstrate this option's use. Files CPBCONM.INP, CPBVARM.INP, and
CPBWRITM.DAT present another sample case, but note that intersection concentrations
are not specified, as in earlier
Releases, and therefore are assumed to be zero.
----------------------------------------------------------------------
Users experiencing problems or encountering bugs are encouraged
to contact:
Dr. Robert J. Yamartino <rjy@maine.rr.com>
Consulting Scientist
509 Chandler's Wharf
Portland, ME 04101 USA
Tel/FAX: 207-780-0594
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