Extinction of radiant energy by large atmospheric crystals with different shapes

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The calculated results of extinction characteristics of visible and infrared radiation for large semi-transparent crystals are obtained by hybrid technique, which is a combination of the geometric optics method and the physical optics method. Energy and polarization characteristics of the radiation extinction in terms of the elements of the extinction matrix for individual large crystals and ensemble of crystals are discussed. Influences of particle shapes, aspect ratios, parameters of size distribution, complex refractive index, orientation of crystals, wavelength, and the polarization state of an incident radiation on the extinction are illustrated. It is shown that the most expressive and stable features of energy and polarization characteristics of the extinction are observed in the midinfrared region, despite the fact that the ice particles significantly absorb the radiant energy of this spectrum. It is demonstrated that the polarized extinction characteristics can reach several tens of percent at IR wavelengths. For the large crystals, the conditions of occurrence of the spectral behavior of the extinction coefficient in the visible, near-IR, and mid-IR wavelength ranges are determined.

Original languageEnglish
Pages (from-to)350-360
Number of pages11
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume178
DOIs
Publication statusPublished - 1 Jul 2016

Keywords

  • Extinction
  • Oriented crystals
  • Polarization
  • Visible and IR radiation

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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