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Estimation of entrainment rate in simple models of convective clouds
Author(s) -
Gregory David
Publication year - 2001
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49712757104
Subject(s) - entrainment (biomusicology) , convection , mechanics , environmental science , deep convection , atmospheric sciences , meteorology , kinetic energy , cloud top , convective flow , geology , cloud computing , physics , computer science , classical mechanics , rhythm , acoustics , operating system
A method for estimating lateral entrainment rate in clouds is suggested, linking its magnitude to buoyant production of vertical kinetic energy within a cloud updraught. In single‐column model studies the formulation captures the high values of entrainment seen in shallow convection and the values an order of magnitude lower in cases of deep convection, as suggested by observational studies and large‐eddy model simulations, together with a realistic vertical variation. Comparison is made with other recent attempts to parametrize entrainment.