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Cloud cover over the equatorial eastern Pacific derived from July 1983 International Satellite Cloud Climatology Project data using a hybrid bispectral threshold methodA set of visible and IR data obtained with GOES from July 17-31, 1983 is analyzed using a modified version of the hybrid bispectral threshold method developed by Minnis and Harrison (1984). This methodology can be divided into a set of procedures or optional techniques to determine the proper contaminate clear-sky temperature or IR threshold. The various optional techniques are described; the options are: standard, low-temperature limit, high-reflectance limit, low-reflectance limit, coldest pixel and thermal adjustment limit, IR-only low-cloud temperature limit, IR clear-sky limit, and IR overcast limit. Variations in the cloud parameters and the characteristics and diurnal cycles of trade cumulus and stratocumulus clouds over the eastern equatorial Pacific are examined. It is noted that the new method produces substantial changes in about one third of the cloud amount retrieval; and low cloud retrievals are affected most by the new constraints.
Document ID
19870053486
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Minnis, Patrick
(NASA Langley Research Center Hampton, VA, United States)
Harrison, Edwin F.
(NASA Langley Research Center Hampton, VA, United States)
Gibson, Gary G.
(PRC Kentron, Inc. Aerospace Technologies Div., Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
April 20, 1987
Publication Information
Publication: Journal of Geophysical Research
Volume: 92
ISSN: 0148-0227
Subject Category
Meteorology And Climatology
Accession Number
87A40760
Distribution Limits
Public
Copyright
Other

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