Editorial Type:
Article
Article Type:
Research Article

Lidar Observation of Elevated Pollution Layers over Los Angeles

Roger M. Wakimoto Department of Atmospheric Sciences, University of California, Los Angeles, CA 90024

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James L. McElroy U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, Las Vegas, NV 89114

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Print Publication:
01 Nov 1986
DOI:
https://doi.org/10.1175/1520-0450(1986)025<1583:LOOEPL>2.0.CO;2
Page(s):
1583–1599
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Abstract

Elevated pollution layers are observed over Los Angeles with an aircraft equipped with a downward-looking lidar. For the first time, detailed ancillary upper-air kinematic and thermodynamic data were collected simultaneously to aid in the interpretation of these elevated layers. It is concluded that upper-level winds within the inversion, orographic effects, and thermally induced changes in the depth of the mixed layer control the evolution of these layers.

Abstract

Elevated pollution layers are observed over Los Angeles with an aircraft equipped with a downward-looking lidar. For the first time, detailed ancillary upper-air kinematic and thermodynamic data were collected simultaneously to aid in the interpretation of these elevated layers. It is concluded that upper-level winds within the inversion, orographic effects, and thermally induced changes in the depth of the mixed layer control the evolution of these layers.

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