2.6 New entrainment rate parameterization for a unified PBL scheme

Monday, 9 June 2008: 11:45 AM
Aula Magna (Aula Magna)
Cara-Lyn Lappen, Colorado State University, Fort Collins, CO; and D. A. Randall

ADHOC2 is a unified higher-order closure- mass flux model that is capable of simulating clear as well as cloudy pbls within a single framework. Using this scheme in a large-scale model requires a method to determine the entrainment rate. Using the mass-flux parameters, we derive a consistent formula for the entrainment rate at the pbl top for clear and smoke cloud cases. This can be generalized to cloudy boundary layers as well.
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