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 CO Paul Field, UK Met Office, Exeter, UK Sonia Lasher-Trapp, Purdue Univ., West Lafayette, IN Dave 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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Observations of Early Ice Formation during the ICE in Clouds Experi ment: ICE-T. Andrew Heymsfield, NCAR, Boulder CO Paul Field, UK Met Office, Exeter, UK Sonia Lasher-Trapp, Purdue Univ., West Lafayette, IN Dave Rogers and Jeff Stith , NCAR, Boulder, CO - PowerPoint PPT Presentation

Transcript of Observations of Early Ice Formation during the ICE in Clouds Experi ment: ICE-T

Page 1: Observations of Early Ice Formation during the ICE in Clouds Experi ment: ICE-T

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.


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