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Calculations of transmission functions in the infrared CO2 and O3 bandsAn efficient method for computing the transmission function in the 15-micron CO2 and the 9.6-micron O3 bands is presented. An inhomogeneous atmospheric path is treated as homogeneous by applying simple pressure and temperature scaling approximations. The transmission functions are then derived from small precomputed tables. Because the atmospheric cooling rate is primarily contributed from adjacent layers, the simple scaling approximations can be used to accurately compute transmission functions in both the middle and lower atmosphere. Applying the parameterization to vastly different atmospheric conditions, the difference with line-by-line calculations is small. In the region between 0.01 mbar and the earth's surface, the cooling rate difference is less than 0.3 C/d in the 15-micron CO2 band and less than 0.1 C/d in the 9.6-micron O3 band.
Document ID
19910053658
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chou, Ming-Dah
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kouvaris, Louis
(Applied Research Corp. Landover, MD, United States)
Date Acquired
August 15, 2013
Publication Date
May 20, 1991
Publication Information
Publication: Journal of Geophysical Research
Volume: 96
ISSN: 0148-0227
Subject Category
Meteorology And Climatology
Accession Number
91A38281
Distribution Limits
Public
Copyright
Other

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