E. Batchvarova et Se. Gryning, AN APPLIED-MODEL FOR THE HEIGHT OF THE DAYTIME MIXED-LAYER AND THE ENTRAINMENT ZONE, Boundary - layer meteorology, 71(3), 1994, pp. 311-323
A model is presented for the height of the mixed layer and the depth o
f the entrainment zone under near-neutral and unstable atmospheric con
ditions. It is based on the zero-order mixed layer height model of Bat
chvarova and Gryning (1991) and the parameterization of the entrainmen
t zone depth proposed by Gryning and Batchvarova (1994). However, mast
zero-order slab type models of mixed-layer height may be applied. The
use of the model requires only information on those meteorological pa
rameters that are needed in operational applications of ordinary zero-
order slab type models of mixed-layer height: friction velocity, kinem
atic heat flux near the ground and potential temperature gradient in t
he free atmosphere above the entrainment zone. When information is ava
ilable on the horizontal divergence of the large-scale flow field, the
model also takes into account the effect of subsidence, although this
is usually neglected in operational models of mixed-layer height owin
g to lack of data. Model performance is tested using data from the CIR
CE experiment.