An aerosol microphysics dataset was used to model backscatter in the 0.35–11-μm wavelength range, with the results validated by comparison with measured cw and pulsed lidar backscatter obtained during two NASA-sponsored airborne field experiments. Different atmospheric features were encountered, with aerosol backscatter ranging over 4 orders of magnitude. Modeled conversion functions were used to convert existing lidar backscatter datasets to 2.1 μm. Resulting statistical distribution shows the midtropospheric aerosol backscatter background mode of β2.1 to be between ~3.0 × 10−10 and ~1.3 × 10−9 m−1 sr−1, ~10–20 times higher than that for β9.1; and a β2.1 boundary layer mode of ~1.0 × 10−7 to ~1.3 × 10−6 m−1 sr−1, ~3–5 times higher than β9.1.
© 2001 Optical Society of America
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(010.1110) Atmospheric and oceanic optics : Aerosols
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(010.3640) Atmospheric and oceanic optics : Lidar
(280.0280) Remote sensing and sensors : Remote sensing and sensors
Vandana Srivastava, Jeffry Rothermel, Antony D. Clarke, James D. Spinhirne, Robert T. Menzies, Dean R. Cutten, Maurice A. Jarzembski, David A. Bowdle, and Eugene W. McCaul, "Wavelength Dependence of Backscatter by use of Aerosol Microphysics and Lidar Data Sets: Application to 2.1- μm Wavelength for Space-Based and Airborne Lidars," Appl. Opt. 40, 4759-4769 (2001)