A Simulation Study of Atmosphere-Vegetation Interactions over the Tibetan Plateau Part Ⅰ: Physical Fluxes and Parameters
Lu Jianhua and Ji Jinjun (Institute of Atmospheric Physics, Chinese Academy of Sciences,, Beijing 100029)
A revised version of the Atmosphere-Vegetation Interaction Model AVIM is given. The physiological processes of this model, such as photosynthesis, respiration, allocation and phenology are described in detail in this paper. It also presents the way of the interactions between the physical pro-cesses and the physiological processes in the AVIM model. The simulated distributions of land surface physical fluxes, such as net radiation, sensible heat fluxes, and some dynamical parameters, such as sur-face drag coefficient (CD) and albedo on the Tibetan Plateau by the atmosphere-vegetation interaction model (AVIM) are presented in this part of the paper. The results show that the net radiation and sensi-ble heat fluxes increase from the southeast to the northwest of the plateau, and the same apply for the latent heat flux by transpiration. The simulated distribution of albedo is close to the observed distribu-tion, and since it is shown that vegetation plays an important rule in it.