ABSTRACT
Change in PRD ................................................................................. 372 19.3 Assessment of the Impact of LULCC Change on
Regional Climate through Modeling ............................................................ 375 19.3.1 Model Framework ............................................................................. 375 19.3.2 Model Parameterization.................................................................... 377 19.3.3 Initial and Boundary Conditions ...................................................... 377
19.4 Impact of LULCC on Regional Climate Condition in a Dry Autumn in October 2004 ............................................................... 378 19.4.1 Shelter-Level Temperature ................................................................ 378
19.4.1.1 Moisture Condition ............................................................380 19.4.1.2 Surface Fluxes....................................................................380 19.4.1.3 PBL Height ......................................................................... 381
19.5 Impact of LULCC on Regional Climate Condition in Summer of June 2005 ............................................................................... 385 19.5.1 Shelter-Level Temperature ................................................................ 385
19.5.1.1 Moisture and Precipitation ................................................. 386 19.5.1.2 Surface Fluxes.................................................................... 388
19.6 Summary and Conclusion ............................................................................. 389 Acknowledgments .................................................................................................. 391 References .............................................................................................................. 391
Land use/land cover (LULC) is one of the most convincing aspects of the global change that has occurred in the terrestrial ecosystem (Meyer and Turner II, 1994; IPCC, 2001). Many changes in LULC refl ect the impacts of human activities on global environment (e.g., Houghton et al., 1999). Change in LULC is also recognized as a main driver affecting the local, regional, and global climate (e.g., Charney et al., 1977; Chase et al., 1996; Stohlgren et al., 1998; Eastman et al., 2001; Foley et al., 2005). For instance, urbanization alters the urban-rural surface energy balance, affects the thermal stratifi cation of the urban boundary layer, the local-scale atmospheric circulation, and the aerosol environment (Changnon and Huff, 1986; Shepherd 2005). Urbanization also affects precipitation through increases in hygroscopic nuclei, turbulence transfer, convection, rain-producing clouds, and the addition of water vapor from anthropogenic sources (Souch and Grimmond, 2006), all of which can lead to an altered pattern in urban precipitation frequency and intensity (e.g., Shepherd, 2006). The impact of LULC change on regional-scale climate has also been well documented (e.g., Dickinson, 1983; Sellers et al., 1996; Pielke et al., 1997; Xue et al., 2001).
