Observations of Early Ice Formation during the ICE in Clouds Experi ment: ICE-T
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Observations of Early Ice Formation during the ICE in Clouds Experiment: ICE-T
Andrew Heymsfield, NCAR, Boulder COPaul Field, UK Met Office, Exeter, UK
Sonia Lasher-Trapp, Purdue Univ., West Lafayette, INDave Rogers and Jeff Stith, NCAR, Boulder, CO
Zhien Wang, Dave Leon, Jeff French, and Sam Haimov, University of Wyoming, Laramie, WY
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RF05 12 July 2011
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RF0512 July 2011
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184942
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18:44:347.7C
Fast 2DC 3VCPI
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185023-3.4C
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19:22:30-5.7C
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19:30:21-7C
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185027:16, break,185718
T=-2C
T=-6C
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Summary and Conclusions
• Observations in developing chimney clouds ---Updraft velocities ranging from 5-14 m/s ---Temperatures from +7 to -7C
• Active ice formation process at T>-5 to -7C~.1/L• For ICE-T clouds, secondary ice particles are
prevalent near -5C with low LWCs and vertical velocities, undetectable with higher LWCs and w’s.
• ICE-D (“dust) in 2015 from Cape Verde, AF, will target the effects of dust on cloud processes.