What question did this study set out to answer?

Determine whether backscattered laser depolarization can distinguish between spherical water droplets and non-spherical ice crystals in cloud formations.

March 1, 1974Journal of applied meteorologyOpen Access

Laser Sensing of Cloud Composition: A Backscattered Depolarization Technique

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Authors

KLKuo‐Nan LiouUniversity of California, Los Angeles HLHenry LahoreUniversity of Washington

Discussion

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Implication

Laboratory and theoretical study demonstrates distinct backscattered depolarization ratios in clouds, indicating laser sensing can identify water versus ice composition.

Key Points

Determine whether backscattered laser depolarization can distinguish between spherical water droplets and non-spherical ice crystals in cloud formations.
Conducted theoretical ray-tracing analyses to evaluate backscattered light polarization from spherical droplets and hexagonal ice crystals.
Performed laboratory experiments using a 6328 Å helium-neon laser to measure depolarization ratios across simulated water and ice clouds.
Spherical water clouds yielded a low depolarization ratio of 2–4%, whereas randomly oriented ice crystal clouds yielded an initial depolarization ratio of approximately 35% (theoretical estimate of about 29%).
Depolarization in hexagonal ice crystals was driven by internal reflections, with ratios depending on crystal size, orientation plane, and incident polarization state when accounting for multiple scattering.

Cite This Study

Liou et al. (1974) studied this question.

synapsesocial.com/papers/6a8a5baab4e829b19bd47cd1 https://doi.org/10.1175/1520-0450(1974)013<0257:lsocca>2.0.co;2

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March 1, 1974Journal of applied meteorologyOpen Access

Laser Sensing of Cloud Composition: A Backscattered Depolarization Technique

View Full Paper

Ask AI

Bookmark

Authors

KLKuo‐Nan LiouUniversity of California, Los Angeles HLHenry LahoreUniversity of Washington

Discussion

Member takes

Implication

Laboratory and theoretical study demonstrates distinct backscattered depolarization ratios in clouds, indicating laser sensing can identify water versus ice composition.

Key Points

Determine whether backscattered laser depolarization can distinguish between spherical water droplets and non-spherical ice crystals in cloud formations.
Conducted theoretical ray-tracing analyses to evaluate backscattered light polarization from spherical droplets and hexagonal ice crystals.
Performed laboratory experiments using a 6328 Å helium-neon laser to measure depolarization ratios across simulated water and ice clouds.
Spherical water clouds yielded a low depolarization ratio of 2–4%, whereas randomly oriented ice crystal clouds yielded an initial depolarization ratio of approximately 35% (theoretical estimate of about 29%).
Depolarization in hexagonal ice crystals was driven by internal reflections, with ratios depending on crystal size, orientation plane, and incident polarization state when accounting for multiple scattering.

Cite This Study

Liou et al. (1974) studied this question.

synapsesocial.com/papers/6a8a5baab4e829b19bd47cd1 https://doi.org/10.1175/1520-0450(1974)013<0257:lsocca>2.0.co;2

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