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Bivariate conditional sampling of buoyancy flux during an intense cold-air outbreakThe joint frequency distribution technique was used to analyze buoyancy fluxes in the marine atmospheric boundary layer (MABL) for the cloud street regime noted during the Genesis of Atlantic Lows Experiment. It is found that for the lower half of the MABL, the buoyancy flux is mainly generated by the rising thermals and the sinking compensating ambient air, and is mainly consumed by the entrainment and detrainment of thermals, penetrative convection, and the entrainment from the MABL top. If the buoyancy flux is primarily driven by the temperature flux, these buoyancy-flux generating processes should be the same for the lower boundary layers over land and ocean. The results of the scale analysis of the buoyancy flux agree well with those obtained for mesoscale cellular convection during the Air-Mass Transformation Experiment.
Document ID
19890062660
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Chou, Shu-Hsien
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Zimmerman, Jeffrey
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Boundary-Layer Meteorology
Volume: 46
Issue: 1-2,
ISSN: 0006-8314
Subject Category
Meteorology And Climatology
Accession Number
89A50031
Distribution Limits
Public
Copyright
Other

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