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 September 1994 | metadata_only
Journal Article

An air monitoring network using continuous particle size distribution monitors: Connecting pollutant properties to visibility via Mie scattering calculations


Aerosol size distribution data collected by the Southern California Air Quality Study (SCAQS) air monitoring network have been combined with values of the aerosol refractive index estimated from filter-based determinations of aerosol chemical composition. The resulting data have been used to calculate the aerosol light scattering coefficient values in time series at four air monitoring sites via Mie theory. It was found that the time series of the measured light scattering coefficient values could be reproduced well by the visibility model in those cases where redundant nephelometer measurements were available to assure that the measured light scattering coefficient values were not in doubt. Based on this study, it appears practical to maintain a network of monitoring sites that can be used to acquire size-distributed aerosol data simultaneously over a large geographic region. Such data will be needed in the near future for evaluation and testing of grid-based air quality models for the formation and transport of size-distributed particulate matter. Such data can be used at present to connect pollutant properties to visual range via modeling calculations based on Mie theory.

Additional Information

© 1994 Elsevier Science Ltd. First received 21 July 1993 and in final form 3 February 1994. Available online 23 February 2004. The authors wish to thank Susanne Hering for helpful discussions during data analysis. This research was supported by the California Air Resources Board under Agreement A932-054.

Additional details

August 22, 2023
August 22, 2023