Distribution and Effects of Automotive Exhaust Gases in Los Angeles

Larson, Gordon P.; Chipman, John C.; Kauper, Erwin K.

doi:10.4271/550276

Cited by 6 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While numerous emission sources were thought to contribute to smog formation, much early attention was focused on vehicle exhaust. The LACAPCD estimated that gasoline consumption in LA County in 1954 was approximately 4.5 million gallons/day, resulting in daily exhaust hydrocarbon emissions of 850 tons [29]. Based on LACAPCD's Based on the research discussed above, scientists became convinced that during the photo-oxidation processes, VOCs must be acting to remove NO from the atmospheric reaction mixture, thereby allowing the ozone concentration to increase beyond its equilibrium concentration in the absence of VOCs.…”

Section: Contribution Of Vehicle Exhaust To Smog Formationmentioning

confidence: 99%

“…While numerous emission sources were thought to contribute to smog formation, much early attention was focused on vehicle exhaust. The LACAPCD estimated that gasoline consumption in LA County in 1954 was approximately 4.5 million gallons/day, resulting in daily exhaust hydrocarbon emissions of 850 tons [29]. Based on LACAPCD's assessments, a serious smog problem would remain in the LA area even if all stationary source HC emissions were eliminated.…”

Section: Contribution Of Vehicle Exhaust To Smog Formationmentioning

confidence: 99%

See 1 more Smart Citation

Vehicle Emissions and Air Quality: The Early Years (1940s–1950s)

Hoekman

Welstand

2021

Atmosphere

View full text Add to dashboard Cite

During the 1940s, an unusual form of air pollution was experienced in the Los Angeles (LA) area of Southern California. Referred to as LA smog, this pollution differed from previously known air pollution with respect to its temporal patterns (daytime formation and nighttime dissipation), eye irritation, high oxidant levels, and plant damage. Early laboratory and field experimentation discovered the photochemical origins of LA smog. Though mechanistic understanding was incomplete, it was determined that hydrocarbon (HC) compounds in the atmosphere participate in smog formation, enabling build-up of higher ozone concentrations than would otherwise occur. It being a significant source, there was great interest in characterizing and controlling HC emissions from motor vehicles. Considerable work was done in the 1940s and 1950s to understand how emissions varied with vehicle operating conditions and deterioration of engine components. During this time, procedures were developed (and improved) to sample and quantify vehicle emissions. Besides exhaust, HC emissions from crankcase blowby, carburetor evaporation, and fuel tank losses were measured and characterized. Initial versions of both catalytic and non-catalytic exhaust after-treatment systems were developed. The knowledge gained from this pre-1960 work laid the foundation for many advancements that reduced vehicle emissions and improved air quality during subsequent decades.

show abstract

Section: Contribution Of Vehicle Exhaust To Smog Formationmentioning

confidence: 99%

“…While numerous emission sources were thought to contribute to smog formation, much early attention was focused on vehicle exhaust. The LACAPCD estimated that gasoline consumption in LA County in 1954 was approximately 4.5 million gallons/day, resulting in daily exhaust hydrocarbon emissions of 850 tons [29]. Based on LACAPCD's assessments, a serious smog problem would remain in the LA area even if all stationary source HC emissions were eliminated.…”

Section: Contribution Of Vehicle Exhaust To Smog Formationmentioning

confidence: 99%