Publication Abstracts

Macke et al. 1996

Macke, A., J. Mueller, and E. Raschke, 1996: Single scattering properties of atmospheric ice crystals. J. Atmos. Sci., 52, 2813-2825, doi:10.1175/1520-0469(1996)053<2813:SSPOAI>2.0.CO;2.

Simulations of scattering and polarization properties for randomly oriented polyhderal ice crystals are presented based on the geometric optics and the far-field diffraction approximation. Particle shapes range from various hexagonal symmetric particles to highly complex shaped deterministic and random fractals. All calculations are preformed at a wavelength of 0.55 µm. Hexagonal symmetric particles show several narrow scattering peaks besides the well known 22° and 46° halos. Column-like ice crystals provide neutral points (NP) at larger scattering angles than plate-like ice crystals. The ranges of NPs for column-like and plate-like crystals are separated at a scattering angle of about 156°, which may allow a polarimetric distinction between these two crystal types. The effects of particle size are studied by applying observationally derived aspect-ratio parameterizations to the individual particle types. Differences in the asymmetry parameter versus size relations for column-like particle types are basically caused by different aspect-ratio parameterizations rather than by the different types of columns. Thus, solid hexagonal columns appear representative for all column-like ice crystals. The dependency on crystal type is much stronger for plate-like particles. Increasing distortion of the crystal shapes leads to a considerable smoothing of the scattering signature. Scattering by complex-shaped particles is discussed for deterministic and randomized tradic Koch-like fractals. The scattering signature for disordered fractals converges with increasing distortion and may be regarded as characteristic for complex-shaped ice crystals.

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BibTeX Citation

  author={Macke, A. and Mueller, J. and Raschke, E.},
  title={Single scattering properties of atmospheric ice crystals},
  journal={J. Atmos. Sci.},

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RIS Citation

ID  - ma01900d
AU  - Macke, A.
AU  - Mueller, J.
AU  - Raschke, E.
PY  - 1996
TI  - Single scattering properties of atmospheric ice crystals
JA  - J. Atmos. Sci.
VL  - 52
SP  - 2813
EP  - 2825
DO  - 10.1175/1520-0469(1996)053%3C2813%3ASSPOAI%3E2.0.CO;2
ER  -

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