HR: 16:15h
AN: H24B-02 INVITED    [Abstracts]
TI: Turbulent flow over isolated ridges; influence of vegetation
AU: * Patton, E G
EM: patton@ucar.edu
AF: National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States
AB: An investigation of turbulent flow over isolated rough ridges will be presented. Comparisons will be made between large-eddy simulations with 1) a specified roughness length and 2) resolving the influence of a forest canopy of equivalent roughness. In the latter case, the interplay between the pressure drag induced by the hill and that from the vegetation makes the hill appear more steep than reality. Wind tunnel simulations will provide support for the numerical results. In closing, the impact of this interplay on scalar transport and it's influence on point measurements in this regime will be emphasized.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 1843 Land/atmosphere interactions (1218, 1631, 3322)
SC: Hydrology [H]
MN: 2007 Fall Meeting