HR: 1330h
AN: H42A-1058    [PDF]
TI: Investigating Effects of Land Surface Cover Heterogeneity on the Uncoupled and Coupled RSM and VIC
AU: * Chen, J
EM: jichen@ecpc3.ucsd.edu
AF: Scripps Institution of Oceanography, UCSD, 9500 Gilman Dr., DEPT0224, La Jolla, CA 92093-0224 United States
AU: Roads, J
EM: jroads@ucsd.edu
AF: Scripps Institution of Oceanography, UCSD, 9500 Gilman Dr., DEPT0224, La Jolla, CA 92093-0224 United States
AU: Kanamitsu, M
EM: mkanamitsu@ucsd.edu
AF: Scripps Institution of Oceanography, UCSD, 9500 Gilman Dr., DEPT0224, La Jolla, CA 92093-0224 United States
AB: The Variable Infiltration Capacity (VIC) macro-scale hydrologic land surface model is being coupled with the Regional Spectral Model (RSM). The land surface heterogeneity in VIC is modeled by representing one sub-grid for one vegetation type in each model grid. Increasing the number of sub-grids in each grid will improve modeling land cover heterogeneity at the expense of an increased computational burden. Our goal is to explore the significance of land cover heterogeneity by investigating the influence of increasing heterogeneity on the simulated soil moisture, surface runoff and baseflow, and fluxes between the land and the atmosphere. In particular, we are developing off-line and coupled experiments. For the off-line experiments we are using one-day forecast products from the coupled VIC and RSM model along with observed precipitation from the Climate Prediction Center (CPC) as forcings. These off-line experiments will then be compared to coupled experiments initialized from the offline runs. We focus in particular on the semi-arid areas over the southwestern United States, i.e., the study region of the project for the Sustainability of semi-Arid Hydrology and Riparian Areas (SAHRA).
UR: http://ecpc.ucsd.edu/projects/uastc/
DE: 1818 Evapotranspiration
DE: 1854 Precipitation (3354)
DE: 1860 Runoff and streamflow
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: 2003 Fall Meeting