MRPO Technical Approach
“Nearer” Term Overview For:
• Emissions Modeling
• Meteorological Modeling
• Photochemical Modeling & Domain
• Model Performance Evaluation
• Regulatory Support
These approaches are dynamic and will change as
emissions, met, chemistry, and deposition processes
evolve and hopefully improve
Emissions
Currently
Moving Toward
•
•
•
•
•
• 2002 Emissions
submitted from the
States
• MOBILE6**
• BEIS3/BIOME3*
• CMU Ammonia
• Newer Canadian
Inventory
1999 NEI v2
MOBILE6
BEIS3/BIOME3*
CMU Ammonia
1995 Canadian
anthropogenic
*Day Specific
**Day Specific for Summer Months
MM5
Current Setup
Future
• Explicit Moisture:
Simple ice
• PBL: Pleim-Xiu
• Multi-Layer Soil Model:
Pleim-Xiu
• Radiation: RRTM
• Cumulus: Kain-Fritsch
• 4-D Data Assimilation:
Analysis nudging on;
only above PBL
• Obtain annual 2002
simulation using latest
version of MM5 and
with water phase
mixing ratios explicitly
output
• Obtain EPA annual 2001
simulation
Other Model Inputs
•
Initial and Boundary conditions:
– Currently: profile (v6) released with CMAQ
– Switching to GEOS-CHEM output when available
– Simulations spin up 2 weeks to minimize impact
•
Landuse (11 categories):
– USGS landuse
•
Ozone Column:
– Daily TOMS ozone column data
•
Albedo:
– Monthly albedo based on 10 years of TOMS reflectivity data
•
Photolysis Rates:
– TUV4.0 processor using the discrete ordinate algorithm;
– daily rates files based on daily O3 column and monthly albedo
CAMx4
•
•
•
•
CB4 gas-phase chemistry
Semi-volatile secondary organic aerosol module
ISORROPIA thermodynamics module
PPM horizontal transport, implicit vertical
transport
• RADM based aqueous phase chemistry (same as
CMAQ)
• Sub-grid plume treatment: TBD
• Platform
– RedHat Linux PCs
– Portland Group Fortran Compiler
*Plan to apply CMAQ
and REMSAD to specific
episodes as a QA step
•
•
•
MM5 Domain (light yellow)
– 165 X, 129 Y, 35 Z
– 36 km cells
CAMx Domain (dark yellow)
– 97 X, 90 Y, 14 Z
– 36 km cells
Lambert projection
– Center (-97,40)
– True latitudes (33,45)
k(MM5)
sigma
press.(mb)
height(m)
depth(m)
k(PCM)
depth(m)
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0.000
0.050
0.100
0.150
0.200
0.250
0.300
0.350
0.400
0.450
0.500
0.550
0.600
0.650
0.700
0.740
0.770
0.800
0.820
0.840
0.860
0.880
0.900
0.910
0.920
0.930
0.940
0.950
0.960
0.970
0.980
0.985
0.990
0.995
1.000
10000
14500
19000
23500
28000
32500
37000
41500
46000
50500
55000
59500
64000
68500
73000
76600
79300
82000
83800
85600
87400
89200
91000
91900
92800
93700
94600
95500
96400
97300
98200
98650
99100
99550
100000
14662
12822
11356
10127
9066
8127
7284
6517
5812
5160
4553
3984
3448
2942
2462
2095
1828
1569
1400
1235
1071
911
753
675
598
521
445
369
294
220
146
109
73
36
0
1841
1466
1228
1062
939
843
767
704
652
607
569
536
506
480
367
266
259
169
166
163
160
158
78
77
77
76
76
75
74
74
37
37
36
36
0
16
5597
15
2549
14
2533
13
1522
12
634
11
428
10
329
9
318
8
155
7
153
6
151
5
148
4
3
2
1
--SURF--
37
37
36
36
--SURF--
Model Performance
•
IMPROVE
–
–
•
Super Sites & Special Studies
–
–
•
daily 24 hr samples
PM2.5 Speciation
NH3, HNO3, HNO2, SO2
AIRS -- not shown
–
•
24 hr samples every 3 days
PM2.5 Speciation
March Midwest
–
–
–
•
Hourly gases and meteorology
Hourly/daily PM2.5 Speciation
EPA Speciation
–
–
•
24 hr samples every 3 days
PM2.5 Speciation
Hourly criteria pollutants
TDL U.S. Airways – not shown
–
Hourly meteorological data
Source Apportionment
• Focusing on source
apportionment runs to
support strategy
development
• De-emphasizing VOC,
NOX, SO2, NH3
“generalized” emissions
adjustments
1. Biogenics
2. Other Area
3. Point
4. Nonroad
5. Onroad
6. Ammonia
Summary
• Transition this year from 1999 to 2002 based
anthropogenic emissions
• Continue to use our 2002 MM5 36km simulation; may
seek an updated 2002 MM5 36km run from another RPO
• Continual model performance for 2002 and other select
episodes as emissions and meteorology change
• Iterative modeling process: continually updating
emissions, met, and photochemical modeling until we
essentially “run out of time” for SIP
• Strategy formulation process will be supported with
source apportionment modeling rather than zero out runs
or across the board emissions adjustments
Continental Domain v. Eastern Domain
15km Top v 6km Top