Extended Abstract (2.4M)P1.86
Ice Particle Growth Rates Under Conditions of the Upper Troposphere
Harold Peterson, NASA/MSFC, Huntsville, AL; and M. Bailey and J. Hallett
Atmospheric conditions for growth of ice crystals (temperature and ice supersaturation) are often not well constrained and it is necessary to simulate such conditions in the laboratory to investigate such growth under well controlled conditions over many hours. The growth of ice crystals from the vapour in both prism and basal planes was observed at temperatures of -60 °C and -70 °C under ice supersaturation up to 100% (200% relative humidity) at air pressures derived from the standard atmosphere in a static diffusion chamber. Crystals grew outward from a vertical glass filament, thickening in the basal plane by addition of macroscopic layers greater than 2 µm, leading to growth in the prism plane by passing of successive layers conveniently viewed by time lapse video.
Poster Session 1, Cloud Physics Poster Session 1
Monday, 28 June 2010, 5:30 PM-8:30 PM, Exhibit Hall
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