Assessment of global climate model land surface albedo using MODIS data

Details Assessment of global climate model land surface albedo using MODIS data Assessment of global climate model land surface albedo using MODIS data

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30h..26o&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 8, pp. 26-1, CiteID 1443, DOI 10.1029/2002GL016749

Physics

21

Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions, Meteorology And Atmospheric Dynamics: Radiative Processes, Meteorology And Atmospheric Dynamics: Remote Sensing

Scientific paper

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.

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