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Saturation point representation of cloud-top entrainment instabilityCloud-top entrainment instability was investigated using a mixing line analysis. Mixing time scales are closely related to the actual size of the parcel, so that local instabilities are largely dependent on the scales of mixing near the cloud top. Given a fixed transport velocity, variation over a small range of parcel length scales (parcel mixing velocities) turns an energy-producing mixing process into an energy-consuming mixing process. It is suggested that a single criterion for cloud-top entrainment instability will not be found due to the role of at least three factors operating more or less independently; the stability of the mixing line, the entrainment speed, and the strength of the internal boundary-layer circulation.
Document ID
19920037001
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Boers, Reinout
(CSIRO Div. of Atmospheric Research, Mordialloc, Australia)
Date Acquired
August 15, 2013
Publication Date
November 15, 1991
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 48
ISSN: 0022-4928
Subject Category
Meteorology And Climatology
Accession Number
92A19625
Distribution Limits
Public
Copyright
Other

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