Application of Error Analysis to Surface Temperature Determination by Radiation Budget Techniques

David R. DeWalle School of Forest Resources, The Pennsylvania State University, University Park 16802

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Leslie H. Parmele Northeast Watershed Research Center, Northeastern Region, Agricultural Research Service, U. S. Department of Agriculture

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Abstract

Error analysis based on the definition of the total differential is used to evaluate uncertainties in indirect determination of surface temperature from radiation budget data. The analysis indicates that the uncertainty in temperature estimates can be large, but that the range of error can be reduced if a net pyrradiometer equipped with a blackbody cavity is used. Radiometer calibration accuracy is more important than recording system resolution in determining surface temperature errors under sampling conditions tested.

Abstract

Error analysis based on the definition of the total differential is used to evaluate uncertainties in indirect determination of surface temperature from radiation budget data. The analysis indicates that the uncertainty in temperature estimates can be large, but that the range of error can be reduced if a net pyrradiometer equipped with a blackbody cavity is used. Radiometer calibration accuracy is more important than recording system resolution in determining surface temperature errors under sampling conditions tested.

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