科研之友
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摘要
Land surface processes are an important part of the climate system, affecting atmospheric circulation and climate change. Reasonable descriptions of human activities, biophysical and biochemical processes in the land surface model are very important for improvint our understanding of land-atmosphere interaction. This paper first reviews the development of the land surface model, which has evolved from the simple box model to consider more complete physical, chemical and biological processes, and is developing toward refinement and integration. Human activities, such as irrigation and agricultural fertilization, discharge, and urban planning, affect terrestrial carbon, nitrogen and water cycle processes and aquatic ecosystems. Processes including groundwater lateral flow and the movement of frost and thaw fronts alter water budget, energy balance, and affect the weather, climate, and environment. Therefore, there is an urgent need to reasonably represent these processes and the effects of human activities in land surface models. Then this work introduces the physical parameterizations of a land surface model of the Chinese Academy of Sciences (CAS-LSM). The new developed model can be applied to the simulation of inland river basins in arid areas to quantitatively evaluate the ecohydrological effects of stream water transfer. Combined with climate system models, CAS-LSM can monitor river water environment. It can also help quantitatively evaluate weather and climate effects of urban planning.
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单位中国科学院大学; 水文水资源与水利工程科学国家重点实验室
