Document ID: EPA-HQ-OAR-2002-0056-6140
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2005-03-15T05:00Z

­
1
­
CMAQ
Model
Configuration
and
Code
Used
for
CAMR
Mercury
Modeling
1.
CMAQ
2001
Modeling
Platform
Model
version:
CMAQ
mercury
code
based
on
CCTM
version
OAQPS_
06Feb04
.
Model
dimensions:
148
*
112
*
14
(
x
*
y
*
z)
Model
resolution:
36
x
36
km
horizontal
grid,
14
logarithmic
structure
vertical
layers
(
Table
1)
Model
domain:
Nationwide
centered
at
97
degrees
with
transects
at
33
and
45
degrees
on
a
Lambert
conformal
map
projection
Model
vertical
layer
structure:

14
layers
Sigma
Height
(
m)
Pressure
(
mb)
0
1.00
0
1000
1
0.995
38
995.5
2
0.990
77
991
3
0.980
154
982
4
0.960
310
964
5
0.940
469
946
6
0.910
712
919
7
0.860
1130
874
8
0.800
1657
820
9
0.740
2212
766
10
0.650
3108
685
11
0.550
4212
595
12
0.400
6154
460
13
0.200
9626
280
14
0.000
15676
100
Model
dates:
1/
1/
2001
­
12/
31/
2001
Model
initialization:
­
CMAQ
was
run
in
annual
simulations
with
two
half
years
run
in
parallel,
each
with
a
10
days
ramp­
up
(
i.
e.
the
model
run
for
the
1st
half
year
began
on
December
22,
2000)

2.
CMAQ
Model
Configuration
Gas­
Phase
Chemical
Mechanism:
CB­
IV
with
updated
Isoprene
chemistry
Chemical
Solver:
Euler
Backward
Iterative
(
EBI)
scheme
PM
Module:
Three­
mode
approach:
One
coarse
mode,
two
fine
modes
with
variable
standard
deviations
Inorganic
PM
module:
ISORROPIA
Organic
PM
module:
SOA
module
based
on
Odum/
Griffin
et
al.,
(
1997,
1999)
Advection
Scheme
(
vertical
and
Horizontal):
Piecewise
Parabolic
Method
(
PPM)
scheme
Vertical
Diffusion:
K­
Theory
Eddy
diffusivity
scheme
Dry
Deposition:
M3DRY
module,
modified
RADM
scheme
with
Pleim­
Xiu
land
surface
model
Aqueous
Chemistry:
RADM
Bulk
scheme
Cloud
Scheme:
RADM
Cloud
scheme
Vertical
Coordinate:
Terrain­
following
Sigma
coordinate
­
2
­
3.
CMAQ
Code
The
CMAQ
code,
libraries,
compilation
script
(
makefile),
example
run
script,
and
output
log
files
are
provided
in
the
"
CMAQ
Code"
directory
and
are
briefly
described
below.

Cctm
contains:
­
CMAQ
code
(
mercury
version),
­
Example
run
script
(
2020af_
c1hg_
zo)
­
Compilation
script
(
Makefile)
­
Example
output
log
file
(
cctm_
2020c1hgzo.
dec22.
log.
9051.0)
­
CMAQ
executable
(
CCTM_
04nov04)

lib
contains:
­
library
files
needed
for
compiling
CMAQ,
including
IOAPI,
NetCDF,
MPI,
and
other
libraries
The
example
run
and
compilation
scripts
and
libraries
are
provided
for
running
the
CMAQ
model
on
a
IBM
RS/
6000SP
Cluster
(
a
Beowulf
system
using
the
Scyld
OS)
using
8
parallel
CPU
processors.
Information
for
running
CMAQ
on
different
computer
platforms
can
be
obtained
from
the
"
CMAD
Documents"
section
or
the
CMAS
website:
www.
cmascenter.
org.