28 December 2010 Radiation signature of clouds
Author Affiliations +
Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 754474 (2010) https://doi.org/10.1117/12.885308
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China
Abstract
Modified gamma distribution was used to describe the distribution of particles in clouds. The polydisperse particle system may be converted into a monodisperse particle system. 1) The averaged radius of nonspherical particles associated with a given size distribution, 2) the averaged scattering parameters of water droplets in cumulus, stratus and stratocumulus and that of ice crystals in cirrus, and 3) infrared emissivity of a cirrus layer from the mixing ratios and effective sizes of cloud drop and ice crystal were separately calculated. Simulation results indicate that all scattering parameters of water droplets in cumulus, stratus and stratocumulus are similar. Cross sections increase with the increasing equivalent radius. While efficiency factors vibrate with the increase of equivalent radius. The averaged albedo reaches its peak between 2 and 3 micron, and then decrease with the increasing equivalent radius. The averaged asymmetry factor also vibrates with the increase of equivalent radius. But the scattering parameters of ice crystals in cirrus change differently, and they vary linearly with equivalent radius.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guibin Yuan, Zhigang Fan, and Xiaogang Sun "Radiation signature of clouds", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754474 (28 December 2010); doi: 10.1117/12.885308; https://doi.org/10.1117/12.885308
PROCEEDINGS
11 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

MUSCLE 10 workshop results: a review
Proceedings of SPIE (December 14 1999)
Effect of cirrus clouds in the infrared (4 to 100...
Proceedings of SPIE (December 13 1998)
Absorption of optical radiation by atmospheric crystals
Proceedings of SPIE (February 10 2009)
Infrared radiative characteristics of water clouds
Proceedings of SPIE (September 14 1993)

Back to Top