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Published April 1975 | public
Journal Article

Formulation and initial application of a dynamic model for urban aerosols


A dynamic model for prediction of the spatial and temporal behavior of the size and chemical composition distributions of an urban air pollution aerosol is developed. Particular attention is given to the description of aerosol formation and growth in photochemical smog, in which the aerosol of interest lies primarily in the size range, 0.1–1 μm dia. The dynamic model developed is used to simulate aerosol number and mass concentrations and size distributions along several typical air trajectories on 20 September 1972 in the Los Angeles basin. Predictions of the model are compared with total aerosol mass concentrations computed from light-scattering measurements. The sensitivity of the predictions to assumptions concerning the nature of gas to particle conversion processes is explored.

Additional Information

© 1975 Published by Elsevier. This work was supported by National Science Foundation Grant GK-35476. Helpful discussions with Dr. Warren White concerning the Aerosol Characterization Study sponsored by the State of California Air Resources Board are gratefully acknowledged.

Additional details

August 22, 2023
October 18, 2023