columbus · Use of Scattering Techniques in Cloud Microphysics Research I. The Aureole Method

Use of Scattering Techniques in Cloud Microphysics Research I. The Aureole Method

Title: Use of Scattering Techniques in Cloud Microphysics Research I. The Aureole Method
Creator: Deirmendjian, D.
Date: 1970
Identifier: AD0714582; AD0714582
Abstract: A simple, physically clear method is discussed for assessing the amount of atmospheric turbidity on a cloudless day by observing the circumsolar aureole--the ring of brightness around the sun--and comparing its brightness with that of the equivalent Rayleigh scattering (particle-free) atmosphere. The aureole is known to be caused by aerosols. This report applies exact Mie theory phase functions for idealized polydispersions of spherical particles to account for the aureole. It shows that the brightness gradient within a disc of 10-deg radius around the sun indicates the size distribution of the aerosol particles, and the overall extent of the aureole within 40 deg around the sun indicates the degree of turbidity.
Date Issued: 1970-10
Extent: 47
Corporate Author: Rand Corporation
Corporate Report Number: R-590-PR
Contract: F44620-67-C-0045
DoD Project: Project Rand
Distribution Conflict: No
Access Rights: THIS DOCUMENT HAS BEEN APPROVED FOR PUBLIC RELEASE AND SALE; ITS DISTRIBUTION IS UNLIMITED.
Photo Quality: Not Needed
Distribution Classification: 1
DTIC Record Exists: Yes
Report Availability: Full text available by request
Provenance: Borg-Warner
Type: report
Format: 47 pages ; 28 cm.