Abstract
Clear sky downwelling longwave radiation (Rldc) and cloudy sky downwelling longwave radiation (Rld) formulas were tested across eleven sites in Florida. The Brunt equation, using air vapor pressure and temperature measurements, provides the best Rldc estimates with a root mean square error of less than around 12 Wm−2 across all sites. The Crawford and Duchon's cloudiness factor with Brunt equation is recommended for Rld calculations. This combined approach requires no local calibration and estimates Rld with a root mean square error of less than around 13 Wm−2 and squared correlation coefficients that typically exceed 0.9.
Department
Earth Systems Research Center
Publication Date
10-18-2008
Journal Title
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Choi, M., J.M. Jacobs, and W. Kustas. 2008. Assessment of clear and cloudy sky parameterizations for daily downwelling longwave radiation over different land surfaces in Florida, USA. Geophysical Research Letters. 35. L20402, doi:10.1029/2008GL035731.
Rights
Copyright 2008 by the American Geophysical Union.
Comments
This is an article published by AGU in Geophysical Research Letters in 2008, available online: https://dx.doi.org/10.1029/2008GL035731