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Lidar observations of mixed layer dynamics - Tests of parameterized entrainment models of mixed layer growth rateGround based lidar measurements of the atmospheric mixed layer depth, the entrainment zone depth and the wind speed and wind direction were used to test various parameterized entrainment models of mixed layer growth rate. Six case studies under clear air convective conditions over flat terrain in central Illinois are presented. It is shown that surface heating alone accounts for a major portion of the rise of the mixed layer on all days. A new set of entrainment model constants was determined which optimized height predictions for the dataset. Under convective conditions, the shape of the mixed layer height prediction curves closely resembled the observed shapes. Under conditions when significant wind shear was present, the shape of the height prediction curve departed from the data suggesting deficiencies in the parameterization of shear production. Development of small cumulus clouds on top of the layer is shown to affect mixed layer depths in the afternoon growth phase.
Document ID
19840051595
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Boers, R.
(NASA Goddard Space Flight Center Greenbelt, MD; Wisconsin, University, Madison, WI, United States)
Eloranta, E. W.
(Wisconsin, University Madison, WI, United States)
Coulter, R. L.
(Argonne National Laboratory Argonne, IL, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1984
Publication Information
Publication: Journal of Climate and Applied Meteorology
Volume: 23
ISSN: 0733-3021
Subject Category
Meteorology And Climatology
Report/Patent Number
AD-A151554
Accession Number
84A34382
Funding Number(s)
CONTRACT_GRANT: DAAG29-80-K-0070
Distribution Limits
Public
Copyright
Other

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