A new measure of entrainment zone structure

Details A new measure of entrainment zone structure A new measure of entrainment zone structure

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3416808b&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 16, CiteID L16808

Physics

Geophysics

1

Atmospheric Processes: Boundary Layer Processes, Atmospheric Processes: Convective Processes, Nonlinear Geophysics: Turbulence (3379, 4568, 7863)

Scientific paper

A wavelet covariance algorithm designed to objectively identify the upper and lower limits of the local transition zone between boundary layer and free troposphere is applied to the output fields from a series of Large Eddy Simulations of the convective atmospheric boundary layer. A new measure of entrainment zone structure is defined - the normalized difference between the standard deviations of the local transition zone limits; this is found to be a function of the convective Richardson number and a predictor of normalized entrainment rate. This provides a robust and objective means for determining the Richardson number from remote sensing observations, and the basis for determining the entrainment rate.

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