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An observational study of stratocumulus entrainment and thermodynamicsThe stratocumulus (SC) entrainment and thermodynamics are studied using data from the Dynamics and Chemistry of Marine Stratocumulus (DYCOMS) experiment. The rate of entrainment of air from the free troposphere into the cloud-topped PBL is estimated using a technique based on the measurement of ozone flux and mean distribution. The average measured value of entrainment rate was found to be 3.0 mm/s with a range of 1.0 to 5.0 mm/s for cloudy cases. Thermodynamic budgets are constructed for eight DYCOMS cases. It was found that the divergence of the solar radiative flux is an important component of the boundary-layer energetics during midday, the factor which must be accounted for in mixed-layer models. The net longwave radiative flux profiles show good agreement with theoretical models, but an unambiguous partitioning of the flux divergence between inversion and mixed layers could not be established.
Document ID
19890066797
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kawa, S. R.
(Colorado State University Fort Collins, United States)
Pearson, R., Jr.
(NASA Ames Research Center Moffett Field, CA; Colorado State University, Fort Collins, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1989
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 46
ISSN: 0022-4928
Subject Category
Meteorology And Climatology
Accession Number
89A54168
Distribution Limits
Public
Copyright
Other

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