Faculty Publications

Simulation Of Particulate Matter Distribution Over Iowa

Document Type



Aerosols, Particulate matter, The Box model, The WRF-CHEM model

Journal/Book/Conference Title

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA




Air pollution problems can be caused by particulate matter suspended in the troposphere. The different sources include automobile exhaust, diesel emissions, industrial and residential smokestacks, etc. A budget for particulate matter over Iowa was evaluated using high resolution numerical model data. The study used a Box Model approach, where mass changes inside the box were determined by internal sources and sinks as well as lateral transport. The mass tendency ranged from 15,650 to 154,906 kg. The total emission during each hr of forecast ranged from 26,493.20 to 77,010.60. The increase of mass flux convergence could be a function of particular case chosen for analysis. Residual of the Box Model budget provided the estimate of removal mechanisms in the Weather Research and Forecast Model with chemical processes and corresponded to the difference between mass tendency, mass flux convergence, and emissions. Values of mass flux convergence as well as of the removal had the same pattern of variation during the forecast period. At the 21st time spell of forecast emissions still contributed to the Box. However, beginning from that time and during 13 hourly intervals, the absolute value of removal was larger than absolute value of mass flux convergence. This is an abstract of a paper presented at the 98th AWMA Annual Conference and Exhibition (Minneapolis, MN 6/21-24/2005).


Department of Earth Science

Original Publication Date


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