TexAQS 2006 P3 Comparisons

Summaries for Dallas/Fort-Worth and Houston Urban Centers

Ratios of Average Excess Concentrations (above background) for models and observations
Also: Emission Ratios from inventory (NEI99 version 3, CEMS 2004 update) for available species

Average Excess above Background Ratios, Relative to NOy

O3 CO NOx HNO3 Ethylene Toluene
Ox PAN NH3 SO2 CH2O CH3CHO Xylenes
PM2.5 SO4_pm2.5 NH4_pm2.5 Organic_pm2.5 ElemC_pm2.5 NO3_pm2.5 Total SO2/SO4

Average Excess above Background Ratios, Relative to CO

O3 NOy NOx HNO3 Ethylene Toluene
Ox PAN NH3 SO2 CH2O CH3CHO Xylenes
PM2.5 SO4_pm2.5 NH4_pm2.5 Organic_pm2.5 ElemC_pm2.5 NO3_pm2.5 Total SO2/SO4

Average Excess above Background Ratios, Relative to PM25

O3 CO NOy NOx HNO3 Ethylene Toluene
Ox PAN NH3 SO2 CH2O CH3CHO Xylenes
SO4_pm2.5 NH4_pm2.5 Organic_pm2.5 ElemC_pm2.5 NO3_pm2.5 Total SO2/SO4

Average Excess above Background Ratios, Relative to SO2

O3 CO NOy NOx HNO3 Ethylene Toluene
Ox PAN NH3 CH2O CH3CHO Xylenes
PM2.5 SO4_pm2.5 NH4_pm2.5 Organic_pm2.5 ElemC_pm2.5 NO3_pm2.5 Total SO2/SO4

Average Excess above Background Ratios, Relative to PM2.5 Elemental Carbon

O3 CO NOy NOx HNO3 Ethylene Toluene
Ox PAN NH3 SO2 CH2O CH3CHO Xylenes
PM2.5 SO4_pm2.5 NH4_pm2.5 Organic_pm2.5 NO3_pm2.5 Total SO2/SO4