HR: 1330h
AN: H42A-1061    [PDF]
TI: Impacts of Land Surface Condition on Regional Climate-Chemistry Modeling of East Asia.
AU: * Tan, Q
EM: tan@eas.gatech.edu
AF: Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332
AU: Chameides, W L
EM: wcham@eas.gatech.edu
AF: Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332
AB: Influences of terrain elevation and landuse type on a regional climate-chemistry modeling system applied to East Asia are tested. Terrain and landuse data of different resolutions and origins are interpolated to the model grid by various methods (terrain interpolation with different search radius along the coastline and small islands, landuse interpolation by aggregation and nearest proximity pick). The impact of these approaches and datasets on both meteorological variables, such as momentum, water vapor and heat exchange between atmosphere and land surface, that affect trace gas and particulate concentrations, transport, and deposition, as well as the tracer and particulate concentrations fields themselves are analyzed. Different parameterizations of aerodynamic resistance are tested under various micrometeorology and land surface conditions. Of particular interest are the potential errors introduced into the model results by subgrid-scale inhomogeneity in regions with complicated and rapidly varying topography and landuse. The utility of using a mosaic-type parameterization in the chemical tracer deposition module to account for these subgrid-scale variations is discussed.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions
DE: 1833 Hydroclimatology
DE: 1899 General or miscellaneous
DE: 3322 Land/atmosphere interactions
SC: Hydrology [H]
MN: 2003 Fall Meeting