Utah Wintertime PM2.5 Modeling
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Utah Wintertime PM2.5 Modeling Utah Wintertime PM2.5 Modeling Lance Avey Utah Division of Air Quality
description
Utah Wintertime PM2.5 Modeling. Lance Avey Utah Division of Air Quality. http://www.airquality.utah.gov/. PM2.5 Speciation. Dust 2%. Elemental Carbon 5%. Other 5%. Organic Carbon 20%. Ammonium Nitrate 58%. Ammonium Sulfate 9%. NOx + VOCs. HNO 3 (nitric acid). - PowerPoint PPT Presentation
Transcript of Utah Wintertime PM2.5 Modeling
Utah Wintertime PM2.5 ModelingUtah Wintertime PM2.5 Modeling
Lance AveyUtah Division of Air Quality
http://www.airquality.utah.gov/
Ammonium Sulfate 9%
Organic Carbon 20% Ammonium Nitrate
58%
Other 5%
Elemental Carbon 5%
Dust 2%
PM2.5 Speciation
NOx + VOCs HNO3 (nitric acid)
HNO3 + NH3 NH4NO3 (particulate)
NAAQS for PM2.5
• EPA revised the NAAQS for PM2.5 in December of 2006
– 24-hr standard was lowered from 65 micrograms per cubic meter
(µg/m3) to 35 µg/m3
– Annual standard was retained at 15 µg/m3
– Retained the 24-hr standard for PM10 at 150 µg/m3
State Implementation Plan
• Basic Elements include:
– Modeled Attainment Demonstration (with chemistry)– Emissions Inventories– Emission Limits– Attainment Dates (2 – 7 years after SIP)
Retrospective Modeling
• Replicate the meteorological, emissions, and chemistry of past high PM2.5 episodes
• In the future, the same meteorology and chemistry will cause high PM2.5 episodes
• Future emissions will change – Population Growth, new technologies, cleaner vehicles
• Allows DAQ to evaluate how future changes in emissions (and control strategies) effect PM2.5
EmissionsPoint, Area, Mobile
• 36/12/4 km Horizontal Domain• 37 vertical layers
– 1st layer at ~ 12 meters
– 10 layers below 250 meters
– Initialization uses 12km-NAM Re-analysis
• Pleim-Xiu LSM & Surface Layer, ACM2 PBL• Simulations were ran in 5.5 day segments• Observational and Analysis Nudging
UDAQ Retrospective WRF
Modeling Domain
4km x 4km
WRF Output
2010 Jan 04 – Midnight Local Time
CMAQ Nitrate (ug/m3)
2010 Jan 04 – Midnight Local Time
Hawthorne
0
10
20
30
40
50
60
70
10-Jan 12-Jan 14-Jan 16-Jan 18-Jan 20-Jan 22-Jan
January 2007
24-h
r P
M2.
5 (u
g/m
3)
CMAQ Obs.
Hawthorne CMAQ PM2.5 Simulation Speciation
NO347%
NH416%
SO44%
OC12%
EC7%
OTHER14%
Hawthorne STN PM2.5 Observed Speciation
NO342%
NH416%
SO42%
OC21%
EC4%
OTHER15%
Hawthorne Monitor
Monitor Design Value (observations)
201
4 B
AU
Des
ign
Val
ue
201
9 B
AU
Des
ign
Val
ue
2014
Co
ntr
ol D
esig
n V
alu
e
201
9 C
on
tol D
esig
n V
alu
e
201
9 A
ttai
nm
ent
Des
ign
Val
ue
0
5
10
15
20
25
30
35
40
45
50
2008 2014 2019SLC-Ogden-Clearfield NAA Controling Monitor
PM
25 (
ug/m
3)
Future Year Modeling-Same Meteorology-Same Chemistry-Changes in Emissions
