Aircraft measurements of high average charges on cloud drops in layer clouds Public Deposited

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  • The first reliable aircraft measurements of characteristic cloud drop charges were obtained by utilizing a counterflow virtual impactor to substantially increase charge sensitivity and eliminate spurious contact charging that contaminated previous aircraft measurements. We find average drop charges more than an order of magnitude larger than expected from mountain surface measurements in similar clouds. Our evaluation of the data indicates that the high average charges on cloud drops originate in charge layers at the cloud boundaries and are carried into the cloud layer by vertical motions. These initial aircraft results demonstrate that cloud drop charges in layer clouds may be high enough to influence microphysical processes that promote precipitation.
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  • Beard, K. V., Ochs , H. T. and Twohy, C. H., 2004, Aircraft measurements of high average charges on cloud drops in layer clouds: Geophys . Res. Lett . , v. 31 , L14111.
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  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-04-15T21:49:15Z (GMT) No. of bitstreams: 1 Beard et al GRL 2004.pdf: 174670 bytes, checksum: 127cd6fbfd73e6b4daebaad9405cfc79 (MD5)
  • description.provenance : Submitted by Mary Phan (mpscanner@gmail.com) on 2010-04-15T21:36:36Z No. of bitstreams: 1 Beard et al GRL 2004.pdf: 174670 bytes, checksum: 127cd6fbfd73e6b4daebaad9405cfc79 (MD5)
  • Vol. 31 (2004)
  • Geophysical Research Letters
  • description.provenance : Made available in DSpace on 2010-04-15T21:49:15Z (GMT). No. of bitstreams: 1 Beard et al GRL 2004.pdf: 174670 bytes, checksum: 127cd6fbfd73e6b4daebaad9405cfc79 (MD5) Previous issue date: 2004

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