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  • Presentation | A14A: Advances in Cloud and Precipitation Processes: Integrating Observations, Modeling, and Theory II Oral
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  • A14A-02: Settling and Rotation of Frozen Hydrometeors in Turbulent Air
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  • Location Icon275-277
    NOLA CC
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Author(s):
Timothy Garrett, Organization Not Listed (First Author, Presenting Author)
Eric Pardyjak, University of Utah
Dhiraj Singh, University of Utah


One of the more important parameters for predicting weather and climate is hydrometeor fall speed. For frozen hydrometeors, few direct measurements exist, with some of the best obtained as long ago as the early 1970s. We use a novel suite of instrumentation to show that frozen hydrometeors in turbulent air can fall at speeds much slower or faster than the calculated fall speed in still air, with mean winds playing an unexpectedly important role. Simple mathematical relationships are identified for calculating the magnitude of reduction or enhancement of fall speed as a function of turbulent air intensity and mean wind speed.



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