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Translation speed of convective plumes in the atmospheric surface layer

โœ Scribed by J. C. Kaimal

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
564 KB
Volume
100
Category
Article
ISSN
0035-9009

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โœฆ Synopsis

Abstract

Experiments conducted over a flat uniform ploughed field indicate that the small convective plumes commonly observed in the surface layer travel as an entity with horizontal speeds proportional to the friction velocity, u. This proportionality, in turn, implies a direct relationship between the inferred height of the plume base and roughness length. For these experiments, the height of the plume base averaged 1.2 m.

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The vertical velocity field and the convective plumes in the atmospheric boundary layer have been observed during morning hours with the acoustic Doppler sounder of the C.R.P.E. A method for plume determination using acoustic soundings in the well-mixed layer is presented. Using Telford's 1970 and M