NDLI: Determination of cloud microphysical properties by laser backscattering and extinction measurements

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Determination of cloud microphysical properties by laser backscattering and extinction measurements

Content Provider	NASA Technical Reports Server (NTRS)
Author	Pal, S. R. Dubinsky, R. N. Carswell, A. I.
Copyright Year	1986
Description	The extinction and backscattering of 514 nm laser radiation in polydisperse water droplet clouds was studied in the laboratory. Three cloud size distributions with modal diameters of 0.02, 5.0, and 12.0 microns were investigated. The relationships between the cloud optical parameters (attentuation coefficient, sigma and volume backscattering coefficient, Beta (sub pi)) and the cloud water content, C, were measured for each size distribution. It was found that a linear relationship exists between sigma and C and between beta (sub pi) and C for cloud water content values up to 3gm/cubic m. The linear relationships obtained, however, have slopes which depend on the droplet size distribution. For a given water content both sigma and beta (sub pi) increase as the modal diameter decreases. The measured data are compared with existing theoretical analyses and discussed in terms of thie application to lidar measurements of atmospheric clouds. It is concluded that the empirical information obtained can serve as a basis for quantitative lidar measurements.
File Size	35526
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870000860
Archival Resource Key	ark:/13960/t9964f368
Language	English
Publisher Date	1986-08-01
Access Restriction	Open
Subject Keyword	Meteorology And Climatology Size Distribution Moisture Content Extinction Backscattering Optical Properties Clouds Meteorology Optical Radar Drops Liquids Radar Measurement Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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