Abstract

Measurements of atmospheric aerosol backscatter coefficients, using a coherent CO2 lidar at 9.25- and 10.6-μm wavelengths, are described. Vertical profiles of the volume backscatter coefficient β have been measured to a 10-km altitude over the Pasadena, Calif., region. These measurements indicate a wide range of variability in β both in and above the local boundary layer. Certain profiles also indicate a significant enhancement in β at the 9.25-μm wavelength compared with β at the 10.6-μm wavelength, which possibly indicates a major contribution to the volume backscatter from ammonium sulfate aerosol particles.

© 1984 Optical Society of America

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