Assessment of global climate model land surface albedo using MODIS data
Article first published online: 30 APR 2003
Copyright 2003 by the American Geophysical Union.
Geophysical Research Letters
Volume 30, Issue 8, April 2003
How to Cite
2003), Assessment of global climate model land surface albedo using MODIS data, Geophys. Res. Lett., 30, 1443, doi:10.1029/2002GL016749, 8., , , , , and (
- Issue published online: 30 APR 2003
- Article first published online: 30 APR 2003
- Manuscript Accepted: 21 MAR 2003
- Manuscript Revised: 10 FEB 2003
- Manuscript Received: 10 DEC 2002
 Land surface albedo from the Community Land Model is compared to white-sky (diffuse) and black-sky albedo (direct at local solar noon) from MODIS. Generally, comparisons are more favorable in summer than winter, for visible waveband than near-infrared in regions without snow cover, and for black- than white-sky. In regions with extensive snow cover, the model overestimates white- and black-sky albedo by up to 20% absolute. The snow-free visible and near-infrared black-sky albedo is simulated quite well with biases within ±5% over most of the land surface. However, a large negative model bias was found for the Sahara Desert and Arabian Peninsula, particularly in the near-infrared. The poorer simulation of white- compared to black-sky albedo in vegetated areas implies that the model may be overestimating the increase of albedo with solar zenith angle. These results identify several areas that should have priority in further evaluating and improving albedo in the model.