By using Simple Biosphere Model 2 (SiB2), surface energy balance budget, surface effective radiative temperature, and soil moisture were modeled for the GAME/Tibet Amdo site in a Tibetan short grass prairie (Amdo station) from 15 July through 10 September 1998. During the monsoon period the mean canopy height and the leaf area index were 0.05 m and 0.5, respectively. The study site represented the prevailing conditions of the northern Tibetan Plateau. The model was initialized and driven by using in situ measurements. The forcing data consist of the short-wave solar radiation, atmospheric long-wave radiation, vapor pressure, air temperature, horizontal wind speed, and precipitation. The model outputs of radiation components, turbulent heat fluxes, surface effective radiative temperature, and soil moisture were compared against direct measurements. Results show that: (1) SiB2 overestimated sensible, latent, and soil heat fluxes by 4%, 13%, and 8% respectively when it underestimated net radiation by 0.2%; (2) surface effective radiative temperature was underestimated by 5%; and (3) soil moisture was estimated reasonably. In general, radiation components simulated by SiB2 were more closer to measurements than heat fluxes with high degree of correlation.