Evaluation of satellite estimates of downward shortwave radiation over the Tibetan Plateau

摘要: [1] The state-of-the-art satellite products of downward shortwave radiation over the Tibetan Plateau against ground observations are evaluated in this study. The include International Satellite Cloud Climatology Project-Flux Data (ISCCP-FD) as produced at NASA Goddard Institute for Space Studies (GISS) from ISCCP D1 data, Global Energy and Water Cycle Experiment-Surface Radiation Budget (GEWEX-SRB) results derived Langley Research Center (LaRC) DX a University Maryland product with modified version Surface (UMD-SRB) model implemented METEOSAT-5 observations. These different spatial temporal resolutions, evaluation is performed their native resolutions. Comparisons indicate that, region great variation elevation, using hourly, spatially homogeneous, high resolution data compares more favorably surface measurements than that use three sparse subsamples coarse resolutions (ISCCP-FD GEWEX-SRB). Discrepancies among usually larger highly variable terrain (such Himalayas region) smaller nonvariable central Plateau). This suggests errors dependent Tibet. Therefore caution needs to be exercised when extending comparison based on limited situ accessible sites entire Plateau. Attention should also given quality input parameters besides cloud properties, there large discrepancies clear-sky radiation.