Discrimination of micrometre-sized ice and super-cooled droplets in mixed-phase cloud |
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| Institution: | 1. Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland;2. NERC Isotope Geosciences Facilities, British Geological Survey, Nottingham NG12 5GG, UK;3. Dpt of Anaytical and Environmental Geochemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium;4. Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germany;5. LOCEAN, Sorbonne Universités, UPMC/CNRS/IRD/MNHN, Paris, France;1. Aix-Marseille Université, Université de Toulon, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), Marseille, France Personnels UTLN, France;2. IBS Center for Climate Physics (ICCP), Pusan National University, Busan, Republic of Korea;3. Laboratoire d’Aérologie UMR 5560, Université Paul Sabatier, CNRS, 31400 Toulouse, France |
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| 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. |
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