Publication
Environmental Science and Technology
Paper

Statistical Evaluation of Trends in Ambient Concentrations of Nitric Oxide in Los Angeles

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Abstract

The aerometric data on nitric oxide at several air monitoring sites in Los Angeles County for the period of 1959-1974 are statistically analyzed to determine trends in the concentration levels. Time series and intervention techniques are used to filter out the effects of seasonality, serial correlations, and short-term trends in weather variables. The ambient impacts of the 1966 and 1971 automobile exhaust programs are evaluated in terms of the trend parameters. © 1978, American Chemical Society. All rights reserved.

Date

01 May 2002

Publication

Environmental Science and Technology

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