Journal ArticleDOI
Solar radiative transfer in cirrus clouds. I - Single-scattering and optical properties of hexagonal ice crystals. II - Theory and computations of multiple scattering in an anisotropic medium
Yoshihide Takano,Kuo-Nan Liou +1 more
TLDR
In this paper, the light scattering and absorption programs of Cai and Liou (1982) and Takano and Jaweera (1985) are extended to include hexagonal ice crystals randomly and horizontally oriented in space.Abstract:
The light scattering and absorption programs of Cai and Liou (1982) and Takano and Jaweera (1985) are extended to include hexagonal ice crystals randomly and horizontally oriented in space. The scattering and polarization results for the ice crystals are calculated. The results are compared with measurement data. The single-scattering properties for horizontally oriented columns and plates are presented and used to explain halos and arcs observed in the atmopshere. In the second section, the theory and computations for multiple scattering in cirrus clouds containing oriented ice crystals are presented. The radiative transfer in clouds composed of horizontally oriented ice crystals is formulated. Also, reflected and transmitted intensities, planetary albedo, and polarization in multiple scattering by ice crystals are discussed.read more
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Journal ArticleDOI
Advances in understanding clouds from ISCCP
TL;DR: The progress report on the International Satellite Cloud Climatology Project (ISCCP) describes changes made to produce new cloud data products (D data), examines the evidence that these changes are improvements over the previous version (C data), summarizes some results, and discusses plans for the ISCCP through 2005.
Journal ArticleDOI
Independent measurement of extinction and backscatter profiles in cirrus clouds by using a combined Raman elastic-backscatter lidar
TL;DR: Examples covering the measured range of extinction-to-backscatter ratios (lidar ratios) in ice clouds are presented and simple backscatter lidars can provide reliable information about the cloud optical depth and the mean cloud lidar ratio.
Journal ArticleDOI
Modeling phase functions for dustlike tropospheric aerosols using a shape mixture of randomly oriented polydisperse spheroids
TL;DR: In this article, the authors used the rigorous T-matrix method to extensively compute light scattering by shape distributions of polydisperse, randomly oriented spheroids with refractive indices and size distributions representative of naturally occurring dust aerosols.
Journal ArticleDOI
An Accurate Parameterization of the Infrared Radiative Properties of Cirrus Clouds for Climate Models
TL;DR: In this article, the extinction coefficient, absorption coefficient, and asymmetry factor are parameterized as functions of the cloud ice water content and generalized effective size, and validated by examining the bulk radiative properties for a wide range of atmospheric conditions.
Journal ArticleDOI
The Polarization Lidar Technique for Cloud Research: A Review and Current Assessment
TL;DR: In this article, the development of the polarization lidar technique is reviewed, and the current capabilities and limitations of the technique for the cloud research are discussed, as well as the current theoretical approaches involving ice crystal ray-tracing and cloud microphysical-model simulations are expected to increase the utility of the Lidar technique.