HR: 0800h
AN: H11B-1269    [Abstracts]
TI: Evaluation of Community Land Model Hydrologic Predictions
AU: * Li, K Y
EM: kli@hydro.washington.edu
AF: Civil and Environmental Engineering, University of Washington, 201 More Hall, BOX 352700, Seattle, WA 98195-2700 United States
AU: Lettenmaier, D P
EM: dennisl@u.washington.edu
AF: Civil and Environmental Engineering, University of Washington, 201 More Hall, BOX 352700, Seattle, WA 98195-2700 United States
AU: Bohn, T
EM: tbohn@hydro.washington.edu
AF: Civil and Environmental Engineering, University of Washington, 201 More Hall, BOX 352700, Seattle, WA 98195-2700 United States
AU: Delire, C
EM: delire@isem.univ-montp2.fr
AF: UInstitut des Sciences de l'Evolution, case courier 61, Universit‚ Montpellier II , place E. Bataillon, Montpellier, 35095 France
AB: Confidence in representation and parameterization of land surface processes in coupled land-atmosphere models is strongly dependent on a diversity of opportunities for model testing, since such coupled models are usually intended for application in a wide range of conditions (regional models) or globally. Land surface models have been increasing in complexity over the past decade, which has increased the demands on data sets appropriate for model testing and evaluation. In this study, we compare the performance of two commonly used land surface schemes - the Variable Infiltration Capacity (VIC) and Community Land Model (CLM) with respect to their ability to reproduce observed water and energy fluxes in off-line tests for two large river basins with contrasting hydroclimatic conditions spanning the range from temperate continental to arctic, and for five point (column flux) sites spanning the range from tropical to arctic. The two large river basins are the Arkansas-Red in U.S. southern Great Plains, and the Torne-Kalix in northern Scandinavia. The column flux evaluations are for a tropical forest site at Reserva Jaru (ABRACOS) in Brazil, a prairie site (FIFE) near Manhattan, Kansas in the central U.S., a soybean site at Caumont (HAPEX-Monbilhy) in France, a meadow site at Cabauw in the Netherlands, and a small grassland catchment at Valday, Russia. The results indicate that VIC can reasonably well capture the land surface biophysical processes, while CLM is somewhat less successful. We suggest changes to the CLM parameterizations that would improve its general performance with respect to its representation of land surface hydrologic processes.
DE: 1814 Energy budgets
DE: 1847 Modeling
DE: 1860 Streamflow
DE: 1863 Snow and ice (0736, 0738, 0776, 1827)
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: Fall Meeting 2005