Articles | Volume 12, issue 12
Atmos. Chem. Phys., 12, 5603–5615, 2012
Atmos. Chem. Phys., 12, 5603–5615, 2012

Research article 28 Jun 2012

Research article | 28 Jun 2012

Regional air-quality forecasting for the Pacific Northwest using MOPITT/TERRA assimilated carbon monoxide MOZART-4 forecasts as a near real-time boundary condition

F. L. Herron-Thorpe1, G. H. Mount1, L. K. Emmons2, B. K. Lamb1, S. H. Chung1, and J. K. Vaughan1 F. L. Herron-Thorpe et al.
  • 1Department of Civil & Environmental Engineering, Washington State University, USA
  • 2National Center for Atmospheric Research, Boulder, CO, USA

Abstract. Results from a regional air quality forecast model, AIRPACT-3, were compared to AIRS carbon monoxide column densities for the spring of 2010 over the Pacific Northwest. AIRPACT-3 column densities showed high correlation (R > 0.9) but were significantly biased (~25%) with consistent under-predictions for spring months when there is significant transport from Asia. The AIRPACT-3 CO bias relative to AIRS was eliminated by incorporating dynamic boundary conditions derived from NCAR's MOZART forecasts with assimilated MOPITT carbon monoxide. Changes in ozone-related boundary conditions derived from MOZART forecasts are also discussed and found to affect background levels by ± 10 ppb but not found to significantly affect peak ozone surface concentrations.

Final-revised paper