Publication Abstracts
Liu et al. 2006
, , , , and , 2006: Modeling single-scattering properties of small cirrus particles by use of a size-shape distribution of ice spheroids and cylinders. J. Quant. Spectrosc. Radiat. Transfer, 101, 488-497, doi:10.1016/j.jqsrt.2006.02.040.
In this study, we model single-scattering properties of small cirrus crystals using mixtures of polydisperse, randomly oriented spheroids and cylinders with varying aspect ratios and with a refractive index representative of water ice at a wavelength of 1.88 µm. The Stokes scattering matrix elements averaged over wide shape distributions of spheroids and cylinders are compared with those computed for polydisperse surface-equivalent spheres. The shape-averaged phase function for a mixture of oblate and prolate spheroids is smooth, featureless, and nearly flat at side-scattering angles and closely resembles those typically measured for cirrus. Compared with the ensemble-averaged phase function for spheroids, that for a shape distribution of cylinders shows a relatively deeper minimum at side-scattering angles. This may indicate that light scattering from realistic cirrus crystals can be better represented by a shape mixture of ice spheroids. Interestingly, the single-scattering properties of shape-averaged oblate and prolate cylinders are very similar to those of compact cylinders with a diameter-to-length ratio of unity. The differences in the optical cross sections, single-scattering albedo, and asymmetry parameter between the spherical and the nonspherical particles studied appear to be relatively small. This may suggest that for a given optical thickness, the influence of particle shape on the radiative forcing caused by a cloud composed of small ice crystals can be negligible.
Export citation: [ BibTeX ] [ RIS ]
BibTeX Citation
@article{li06300n, author={Liu, L. and Mishchenko, M. I. and Cairns, B. and Carlson, B. E. and Travis, L. D.}, title={Modeling single-scattering properties of small cirrus particles by use of a size-shape distribution of ice spheroids and cylinders}, year={2006}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, volume={101}, pages={488--497}, doi={10.1016/j.jqsrt.2006.02.040}, }
[ Close ]
RIS Citation
TY - JOUR ID - li06300n AU - Liu, L. AU - Mishchenko, M. I. AU - Cairns, B. AU - Carlson, B. E. AU - Travis, L. D. PY - 2006 TI - Modeling single-scattering properties of small cirrus particles by use of a size-shape distribution of ice spheroids and cylinders JA - J. Quant. Spectrosc. Radiat. Transfer JO - Journal of Quantitative Spectroscopy and Radiative Transfer VL - 101 SP - 488 EP - 497 DO - 10.1016/j.jqsrt.2006.02.040 ER -
[ Close ]