Bistatic lidar measurements of lower tropospheric particle size distribution and optical extinction
Document ID: 304
Stevens, Timothy D.1
Philbrick, C. Russell1
1 The Pennsylvania State University, ARL/PSU LIDAR Laboratory, University Park, PA, U.S.A.
Presented: The 19th Annual Conference on Atmospheric Transmission Models, June 4-6, 1996
Abstract
A study has been conducted to investigate the application of a unique bistatic lidar receiver to remotely determine properties of lower tropospheric aerosols, particularly optical extinction, median radius and size distribution width. The bistatic remote receiver uses a linear photodiode array to image the radiation scattered from any high power CW or pulsed laser system. By observing the angular scattering along a horizontal path, additional information contained in the scattering angle phase function can be obtained.
The first studies using the bistatic lidar were conducted in a marine environment during the Wallops CASE I (Coastal Aerosol Scattering Experiment) program. Tue measurements were made under sufficiently high relative humidities that it is reasonable to use a spherical model to describe the scatterers. A trimodal lognormal distribution of aerosols was observed on September 14, 1995 to increase in size during a period of several hours when the relative humidity remained constant at 92% and the temperature decreased from 23 to 22 deg. C.
Notes
Proceedings of the 19th Annual Conference on Atmospheric Transmission Models, 4-6 June 1996, Author(s) : Anderson, Gail P. ; Picard, Richard H.; Chetwynd, James H. ; Rothman, Laurence S., Accession Number : ADA328230
Keywords: atmospheric models, clouds, aerosols, radiative transfer, laser, transmittance, wave propagation
| Citation: | "Bistatic lidar measurements of lower tropospheric particle size distribution and optical extinction", Stevens, T. D., C. R. Philbrick, Proceedings of the 19th Annual Conference on Atmospheric Transmission Models, 4-6 June 1996, U.S. Air Force, May 1997, pp. 21 - 21, PL-TR-97-2069, Environmental Research Papers, No. 1206 |