Wavelength dependence of ice cloud backscatter properties for space-borne polarization lidar applications

Hajime Okamoto, Kaori Sato, Anatoli Borovoi, Hiroshi Ishimoto, Kazuhiko Masuda, Alexander Konoshonkin, Natalia Kustova

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We investigated the use of backscatter properties of atmospheric ice particles for space-borne lidar applications. We estimated the average backscattering coefficient (β), backscatter color ratio (χ), and depolarization ratio (δ) for ice particles with a wide range of effective radii for five randomly oriented three-dimensional (3D) and three quasi-horizontally oriented two-dimensional (2D) types of ice particle using physical optics and geometrical integral equation methods. This is the first study to estimate the lidar backscattering properties of quasihorizontally oriented non-pristine ice crystals. We found that the χ-δ relationship was useful for discriminating particle types using Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) data. The lidar ratio (S)-δ relationship, which is determined using space-borne high-spectral-resolution lidar products such as EarthCARE ATLID or future space-borne lidar missions, may also produce robust classification of ice particle types because it is complementary to the χ-δ relationship.

Original languageEnglish
Pages (from-to)29178-29191
Number of pages14
JournalOptics Express
Issue number20
Publication statusPublished - Sept 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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