A Caltech Library Service

Effect of Emissions Control Strategies on the Size and Composition Distribution of Urban Particulate Air Pollution

Kleeman, Michael J. and Cass, Glen R. (1999) Effect of Emissions Control Strategies on the Size and Composition Distribution of Urban Particulate Air Pollution. Environmental Science and Technology, 33 (1). pp. 177-189. ISSN 0013-936X. doi:10.1021/es9805122.

[img] PDF (Calculation of secondary organic aerosol formation) - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


The predicted behavior of the size- and chemical-composition distribution of airborne particles in the Los Angeles area is examined as it changes in response to specific emissions control strategies. Model calculations indicate that strategies currently envisioned to control the emissions of primary particles in the Los Angeles area effectively reduce the atmospheric concentrations of particles between 0.1−0.3 μm particle diameter and above 2.5 μm particle diameter but do little to reduce particulate concentrations between 0.6 and 0.8 μm particle diameter. Analysis reveals that in Los Angeles, most atmospheric particles with diameters between 0.6−0.8 μm begin as water-soluble nonsea salt background particles over the Pacific Ocean which then are transformed by significant accumulation of gas-to-particle conversion products as they are advected across the urban area. Control of primary particulate emissions alone does not reduce the amount of secondary aerosol which forms in the atmosphere and may even serve to redistribute this secondary material to particles with diameters that scatter light more efficiently. Strategies originally designed to reduce ambient ozone concentrations through the control of emissions of reactive organic gases (ROG) and oxides of nitrogen (NO_x) would reduce fine particle mass concentrations at Claremont CA on August 28, 1987 by 9.5% under the conditions studied here, primarily by reducing aerosol nitrate concentrations. Additional controls on ammonia emissions would suppress aerosol nitrate formation further. The simultaneous use of all gas-phase and particle-phase emissions control measures studied here would reduce atmospheric particle concentrations by 46% at Claremont, CA, relative to the base case 1987 summer conditions.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Additional Information:© 1999 American Chemical Society. Received for review May 19, 1998. Revised manuscript received October 8, 1998. Accepted October 15, 1998. We wish to thank Dr. Mark Bassett of the South Coast Air Quality Management District for his assistance in interpreting the effect of the tier I and tier II ROG and NO_x controls contained in the 1991 air quality management plan for the South Coast Air Basin. Model results shown in this paper were produced using a Beowulf class parallel computer developed and supported by Thomas Sterling, Jan Lindheim, John Salmon, Paul Angelino, and other members of the Center for Advanced Computer Research at the California Institute of Technology. This research was supported by funds granted to the Caltech Center for Air Quality Analysis.
Funding AgencyGrant Number
Caltech Center for Air Quality AnalysisUNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20160613-112921940
Persistent URL:
Official Citation:Effect of Emissions Control Strategies on the Size and Composition Distribution of Urban Particulate Air Pollution Michael J. Kleeman and Glen R. Cass Environmental Science & Technology 1999 33 (1), 177-189 DOI: 10.1021/es9805122
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67871
Deposited By: George Porter
Deposited On:13 Jun 2016 20:51
Last Modified:11 Nov 2021 03:55

Repository Staff Only: item control page