Record Display for the EPA National Library Catalog

RECORD NUMBER: 39 OF 72

OLS Field Name OLS Field Data
Main Title Lidar Observations of Mixed Layer Dynamics: Tests of Parameterized Entrainment Models of Mixed Layer Growth Rate.
Author Boers, R. ; Eloranta, E. W. ; Coulter, R. L. ;
CORP Author Wisconsin Univ.-Madison. Dept. of Meteorology. ;Argonne National Lab., IL.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA/600/J-84/186;
Stock Number PB85-156503
Additional Subjects Atmospheric motion ; Optical radar ; Mixing ; Remote sensing ; Aerosols ; Convection ; Mathematical models ; Height ; Cumulus clouds ; Depth ; Wind velocity ; Lasers ; Temperature ; Humidity ; Turbulence ; Heat flux ; Data acquisition ; Reprints ; Atmospheric boundary layer ; Tracer studies
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-156503 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 23p
Abstract
Lidar measurements of the atmospheric boundary layer height, the entrainment zone, wind speed and direction, ancillary temperature profiles and surface flux data were used to test current 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. All entrainment models underpredict the mixed layer height. It is suggested that this is partly caused by shear-driven entrainment at the top of the mixed layer, which is not properly parameterized. Development of small cumulus clouds on top of the layer is shown to be important in the afternoon growth phase. (Copyright (c) 1984 American Meteorological Society.)