Open AccessWavelength dependence of ice cloud backscatter properties for space-borne polarization lidar applications
Author(s) -
Hajime Okamoto,
Kaori Sato,
Anatoli G. Borovoi,
Hiroshi Ishimoto,
Kazuhiko Masuda,
Alexander V. Konoshonkin,
Natalia V. Kustova
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.400510
Subject(s) - lidar , remote sensing , backscatter (email) , ice crystals , ice cloud , aerosol , polarization (electrochemistry) , pathfinder , optics , satellite , mie scattering , atmospheric optics , depolarization ratio , environmental science , materials science , physics , scattering , light scattering , meteorology , geology , radiative transfer , telecommunications , chemistry , astronomy , computer science , library science , wireless
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 quasi-horizontally 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.