Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published November 1983 | public
Journal Article

Atmospheric equilibrium model of sulfate and nitrate aerosols


Given local rates of production of gas-phase sulfate and nitrate, ammonia concentration, relative humidity and temperature, a model is presented that enables calculation of the quantity of sulfate/nitrate/ammonium/water aerosol, its precise chemical composition and physical state. The model is based on a complete thermodynamic chemical and phase equilibrium calculation for the sulfate/nitrate/ammonium system. Detailed simulations of sulfate/nitrate/ammonium aerosol evolution are presented, and recent ambient data from Tanner are interpreted. Some new results on temperature variation of activity coefficients are presented in the Appendix.

Additional Information

© 1983 Pergamon Press Ltd. First received 23 December 1982 and in final form 27 April 1983. This work was supported by U.S. Environmental Protection Agency grant R-806844.

Additional details

August 19, 2023
October 17, 2023