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Project Status: complete

Report Published May 1977:

Title: Chemical consequences of air quality standards and of control implementation programs: roles of hydrocarbons, oxides of nitrogen, oxides of sulfur and aged smog in the production of photochemical oxidant and aerosol.

Principal Investigator / Author(s): Pitts, James N., Jr.

Contractor: Statewide Air Pollution Research Center, University of California, Riverside

Contract Number: 5-385

Research Program Area: Atmospheric Processes


The environmental chamber facility established at the Statewide Air Pollution Research Center, University of California, Riverside, under a joint Air Resources Board -- University of California (Project Clean Air) program has been employed in investigators:

To determine the relative rates of reaction of the hydroxyl (OH) radical with a large number of organic compounds including those representative of (a) combustion products, (b) solvent emissions, (c) natural emissions and (d) potential aerosol precursors.

To develop, in conjuction with the above experimental work, a new reactivity scale and classification of organic compounds based on their rates of reaction with the OH radical.

To provide data concerning the photochemically-promoted conversion of sulfur dioxide (SO2) to sulfate aerosol. Previously developed procedures for characterizing polluted ambient air parcels utilizing a diffusion model and available meteorological and air monitoring data have been further refined.

To determine the rates of dilution and diffusion for various pollutants i characteristic air parcels and to utilize this information to design chamber experiments simulating transport, new pollutant emissions and dilution phenomenon.


For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893

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