Assessment of Simulated Water Balance from Noah, Noah-MP, CLM, and VIC over CONUS using the NLDAS Test Bed

TitleAssessment of Simulated Water Balance from Noah, Noah-MP, CLM, and VIC over CONUS using the NLDAS Test Bed
Publication TypeJournal Article
Year of Publication2014
JournalJournal of Geophysical Research-Atmospheres
Volume119
Number4
Pages13751-13770
Date Published12/2014
Abstract

This study assesses the hydrologic performance of four land surface models (LSMs) for the conterminous United States using the North American Land Data Assimilation System (NLDAS) test bed. The four LSMs are the baseline community Noah LSM (Noah, version 2.8), the Variable Infiltration Capacity (VIC, version 4.0.5) model, the substantially augmented Noah LSM with multiparameterization options (hence Noah-MP), and the Community Land Model version 4 (CLM4). All four models are driven by the same NLDAS-2 atmospheric forcing. Modeled terrestrial water storage (TWS), streamflow, evapotranspiration (ET), and soil moisture are compared with each other and evaluated against the identical observations. Relative to Noah, the other three models offer significant improvements in simulating TWS and streamflow and moderate improvements in simulating ET and soil moisture. Noah-MP provides the best performance in simulating soil moisture and is among the best in simulating TWS, CLM4 shows the best performance in simulating ET, and VIC ranks the highest in performing the streamflow simulations. Despite these improvements, CLM4, Noah-MP, and VIC exhibit deficiencies, such as the low variability of soil moisture in CLM4, the fast growth of spring ET in Noah-MP, and the constant overestimation of ET in VIC.

URLhttp://onlinelibrary.wiley.com/wol1/doi/10.1002/2014JD022113/abstract
DOI10.1002/2014JD022113
Funding Program: 
Journal: Journal of Geophysical Research-Atmospheres
Number: 4
Volume: 119

This study assesses the hydrologic performance of four land surface models (LSMs) for the conterminous United States using the North American Land Data Assimilation System (NLDAS) test bed. The four LSMs are the baseline community Noah LSM (Noah, version 2.8), the Variable Infiltration Capacity (VIC, version 4.0.5) model, the substantially augmented Noah LSM with multiparameterization options (hence Noah-MP), and the Community Land Model version 4 (CLM4). All four models are driven by the same NLDAS-2 atmospheric forcing. Modeled terrestrial water storage (TWS), streamflow, evapotranspiration (ET), and soil moisture are compared with each other and evaluated against the identical observations. Relative to Noah, the other three models offer significant improvements in simulating TWS and streamflow and moderate improvements in simulating ET and soil moisture. Noah-MP provides the best performance in simulating soil moisture and is among the best in simulating TWS, CLM4 shows the best performance in simulating ET, and VIC ranks the highest in performing the streamflow simulations. Despite these improvements, CLM4, Noah-MP, and VIC exhibit deficiencies, such as the low variability of soil moisture in CLM4, the fast growth of spring ET in Noah-MP, and the constant overestimation of ET in VIC.

DOI: 10.1002/2014JD022113
Year of Publication: 2014
Citation: "Assessment of Simulated Water Balance from Noah, Noah-MP, CLM, and VIC over CONUS using the NLDAS Test Bed." Journal of Geophysical Research-Atmospheres. 2014;119:13751-13770.