Abstract ID: 697

Evaluation of the NOAH model performance in the Amazon region through a source uncertainty analysis across scales

The accurate simulation of land-surface dynamic patterns in the Amazon region is challenging due to a number of sources of uncertainty, including atmospheric forcing, soil hydraulic properties and vegetation conditions. In this study, we present and analyze the energy and water simulations over the LBA-MIP tower flux sites, which include both eight LBA tower flux sites (leveraged from LBA-MIP) and the entire LBA region simulation region in SALDAS (South American LDAS). We inspect variations in the calibrated parameters using powerful optimization algorithms, and investigate the trends and patterns of the modeled uncertainty of different outputs. Next, we carry out a comprehensive global sensitivity analysis of the model simulations to characterize the influence of uncertainty sources in the hydrometeorological forcing, initial conditions and the NOAH model parameters. Finally, we investigate the spatial variation of the uncertainty factors to guide future land surface process studies and data collection in this region.

Session:  Carbon - The LBA Model-Intercomparison Project.

Presentation Type:  Poster