Los Angeles smog

Fig. 1-5. Los Angeles smog. Source Los Angeles County, California...

Fig. 2-3. Grand average number (N), surface area (S), and volume (V) distribution of Los Angeles smog. The linear ordinate normalized by total number (NT), area (ST), or volume (VT) is used so that the apparent area under the curves is proportional to the quantity in that size range. Source Corn, M., Properties of non-viable particles in the air. In "Air Pollution," 3rd ed., Vol. I ( A. C. Stern, ed.). Academic Press, New York, 1976, p. 123.

White, W. H., R. B. Husar, and S. K. Friedlander. A Study of Los Angeles Smog Aerosol Dynamics by Air Trajectory Analyses. Paper 73-111 Presented at the 66th Annual Meeting of the Air Pollution Control Association, Chicago, Illinois, June 24-28, 1973. 25 pp. 

Renzetti, N. A., and V. Gobran. Studies of Eye Irritation Due to Los Angeles Smog. 1954-1956. Air Pollution Foundation MR-4. San Marino, Calif. Air Pollution Foundation, 1959. 

Minnesota Aerosol-Analyzing System Used in the Los Angeles Smog Project, J. Colloid and Interface Science, 1972, 136. 

Fig. 1. Los Angeles smog. Note the low inversion beneath which the smog accumulates. Above the inversion the air is relatively clear. (Photo by the South Coast Air Quality Management District.)...

Haagen-Smit, A.J. (1952) Chemistry and physiology of Los Angeles smog. Industrial Engineering and Chemistry. 44 1342. 

Materials and Structures. Building materials have become soiled and blackened by smoke, and damage by chemical attack from acid gases in the air has led to the deterioration of many marble statues in western Europe. Metals are also affected by air pollution for example, S02 causes many metals to corrode at a faster rate. Ozone is known to oxidize rubber products, and one of the effects of Los Angeles smog is cracking of rubber tires. Fabrics, leather, and paper are also affected by S02 and sulfuric acid, causing them to crack, become brittle, and tear more easily. 

Los Angeles smog, 241 Low-pressure impactors, 103 Lowan, A. N., 283 Lower explosive limit (LEL), 336 Ludlum, F. H., 255 Lumergs, 265 Lumination, 264 Luminators, 264 Lungs ... 

These catalytic reactions are of great importance in low-temperature oxidation reactions, particularly in atmospheric pollution phenomena (e.g., Los Angeles smog), and their elucidation is required for any elementary understanding of the free radical chemistry of oxygen. The difficulty in studying these systems has been the difficulty of studying ozone itself, plus the evident complexity of intermediates and products in the other system. The results, however, will undoubtedly well repay the efforts. 

Probably the most characteristic causative factor in Los Angeles smog is the lid created by the stagnation of warm air subsiding on the cool marine layer. Late in the summer air flows from an anticyclone over the Pacific Ocean and compresses as it loses altitude in its outward course. Onshore movement of marine air under this outflow maintains a... 

Littman has obtained values of 0 to 60 p.p.h.m. of oxidant as ozone, assuming the above stoichiometry, in Los Angeles smog. 

Ozone, which has played a central role in studies of the Los Angeles smog, was not detected as a product in this first study. Ozone was found to react slowly with saturated hydrocarbons but rapidly with olefins. Peroxyacids were identified among the products when ozone was reacted with aldehydes. 

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