Variability of Spectral Albedo at Table Mountain, Colorado
G. Hodges1, J. Michalsky2 and E. Dutton2
1Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309; 303-497-6460, E-mail: email@example.com
2NOAA Earth System Research Laboratory, Boulder, CO 80305
We explore the variability of spectral albedo, including the breakdown of the white- and black-sky components, using data collected at the ESRL Global Monitoring Division's Table Mountain Surface Radiation station. The instrumentation used for this study are lamp calibrated Multi-Filter Rotating Shadowband Radiometers. These instruments measure at six narrowband channels: 415, 500, 615, 673, 870, and 940 nm. White-sky albedo is the reflectance of the surface under diffuse-sky conditions. Black-sky albedo, also known as directional hemispherical reflectance, is the reflectance of the surface from direct-beam illumination only. Using the surface albedo measured under overcast conditions, the components of the upwelling signal can be separated under black-sky conditions. The primary assumption for this analysis is that diffuse albedo is comparable under both cloudy and clear-sky conditions.