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Updated: Jun 16, 2026

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A prototype cloud physics laser nephelometer.

H H Blau, M L Cohen, L B Lapson

    Applied Optics
    |January 23, 2010
    PubMed
    Summary
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    A new laser nephelometer prototype measures cloud droplet size and concentration by analyzing scattered light pulses. This advancement aids in understanding cloud physics and atmospheric conditions.

    Area of Science:

    • Cloud physics
    • Atmospheric optics
    • Instrumentation

    Background:

    • Accurate measurement of cloud droplet properties is crucial for understanding atmospheric processes and climate.
    • Existing methods for cloud droplet analysis can be limited in real-time resolution or particle-specific data.

    Purpose of the Study:

    • To describe the design and performance of a prototype cloud physics laser nephelometer.
    • To demonstrate the instrument's capability in determining cloud droplet concentrations and size distributions.

    Main Methods:

    • Utilizes a laser nephelometer to measure scattered radiation from individual cloud droplets.
    • Determines droplet concentrations via scattered light-pulse count rates.
    • Determines droplet size distributions from the amplitudes of scattered light pulses.

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    Last Updated: Jun 16, 2026

    A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties
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    Main Results:

    • The prototype successfully measures scattered light from individual cloud droplets.
    • Droplet concentrations can be determined from pulse count rates.
    • Droplet size distributions are obtainable from pulse amplitudes.

    Conclusions:

    • The developed laser nephelometer is a viable instrument for cloud physics research.
    • The instrument offers a novel approach to characterizing cloud droplet populations.
    • Further development could enhance its application in atmospheric studies.