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        Discrimination of micrometre-sized ice and super-cooled droplets in mixed-phase cloud

        Author
        Hirst, E.
        Kaye, Paul H.
        Greenaway, R.
        Field, P.R.
        Johnson, D.W.
        Attention
        2299/4063
        Abstract
        Preliminary experimental results are presented from an aircraft-mounted probe designed to provide in situ data on cloud particle shape, size, and number concentration. In particular, the probe has been designed to facilitate discrimination between super-cooled water droplets and ice crystals of 1–25 μm size within mixed-phase clouds and to provide information on cloud interstitial aerosols. The probe acquires spatial light scattering data from individual particles at throughput rates of several thousand particles per second. These data are logged at 100 ms intervals to allow the distribution and number concentration of each particle type to be determined with 10 m spatial resolution at a typical airspeed of 100 m s−1. Preliminary results from flight data recorded in altocumulus castellanus, showing liquid water phase, mixed phase, and ice phase are presented to illustrate the probe's particle discrimination capabilities.
        Publication date
        2001
        Published in
        Atmospheric Environment
        Published version
        https://doi.org/10.1016/S1352-2310(00)00377-0
        Other links
        http://hdl.handle.net/2299/4063
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