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Spectral and diurnal variations in clear sky planetary albedoSpectral and diurnal variations in the clear sky planetary albedo of the earth are calculated using a radiative transfer model to obtain January and July values for a 5 deg x 5 deg global grid. The model employs observed climatological values of temperatures, humidities, snow and sea-ice cover. The diurnal cycle of clear sky albedo is calculated in the following intervals: 0.2-0.5, 0.5-0.7, and 0.7-4 microns. Observed ozone distribution is specified as a function of latitude and season. The 0.2-0.5 micron spectral albedo is 10-20% higher than the total albedo for all latitudes because of Rayleigh scattering; the 0.5-0.7 micron albedo differs from the total albedo by 1-2% for most latitudes, while the 0.7-4 micron albedo is 5-10% lower than the total because of strong atmospheric absorption. Planetary albedo decreases from morning to local noon, with diurnal variations being particularly strong over water.
Document ID
19820061958
Document Type
Reprint (Version printed in journal)
Authors
Briegleb, B. (National Center for Atmospheric Research Boulder, CO, United States)
Ramanathan, V. (National Center for Atmospheric Research Boulder, CO, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1982
Publication Information
Publication: Journal of Applied Meteorology
Volume: 21
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NASA ORDER L-9477-B
Distribution Limits
Public
Copyright
Other