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

摘要

Results from a regional air quality forecast model, AIRPACT-3, were comparedto AIRS carbon monoxide column densities for the spring of 2010 over thePacific 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 significanttransport from Asia. The AIRPACT-3 CO bias relative to AIRS was eliminatedby incorporating dynamic boundary conditions derived from NCAR's MOZARTforecasts with assimilated MOPITT carbon monoxide. Changes in ozone-relatedboundary conditions derived from MOZART forecasts are also discussed andfound to affect background levels by ± 10 ppb but not found tosignificantly affect peak ozone surface concentrations.