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Optical Properties of Ice Particles in Young ContrailsThe single-scattering properties of four types of ice crystals (pure ice crystals, ice crystals with an internal mixture of ice and black carbon, ice crystals coated with black carbon, and soot coated with ice) in young contrails are investigated at wavelengths 0.65 and 2.13 micrometers using Mie codes from coated spheres. The four types of ice crystals have distinct differences in their single-scattering properties because of the embedded black carbon. The bulk scattering properties of young contrails consisting of the four types of ice crystals are further investigated by averaging their single-scattering properties over a typical ice particle size distribution found in young contrails. The effect of the radiative properties of the four types of ice particles on the Stokes parameters I, Q, U, and V is also investigated for different viewing zenith angles and relative azimuth angles with a solar zenith angle of 30 degrees using a vector radiative transfer model based on the adding-doubling technique. The Stokes parameters at a wavelength of 0.65 micrometers show pronounced differences for the four types of ice crystals. Those at a wavelength of 2.13 micrometers show similar variations with the viewing zenith angle and relative azimuth angle, but their values are noticeably different.
Document ID
20100033492
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Hong, Gang (Texas A&M Univ. College Station, TX, United States)
Feng, Qian (Texas A&M Univ. College Station, TX, United States)
Yang, Ping (Texas A&M Univ. College Station, TX, United States)
Kattawar, George (Texas A&M Univ. College Station, TX, United States)
Minnis, Patrick (NASA Langley Research Center Hampton, VA, United States)
Hu, Yong X. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2008
Subject Category
Optics
Report/Patent Number
LF99-6519
Funding Number(s)
CONTRACT_GRANT: NNL06AA23G
CONTRACT_GRANT: N00014-02-1-0478
CONTRACT_GRANT: N00014-06-1-0069
WBS: WBS 281945.02.04.01.30
CONTRACT_GRANT: NSF ATM-0239605
Distribution Limits
Public
Copyright
Public Use Permitted.

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