陆气相互作用中普通双源模型与ALEXI模型的比较
Land-Atmospheric Interaction from Remote Sensing:A Comparison between Ordinary Dual-Source Model and ALEXI Model
中文摘要：
陆气相互作用影响着天气过程，进而影响区域气候变化，基于站点的地表能量平衡研究需要进行合理的空间尺度拓展。遥感模型为地表能量平衡的量化分析提供了条件，目前已广泛应用于农业和水资源领域，而较少为气候变化研究服务。介绍了以遥感手段研究陆气相互作用的双源模型，并通过对比普通遥感双源模型与ALEXI （Atmosphere-Land Exchange Inversion Model）模型的物理过程，探讨了ALEXI模型在大尺度应用的优势，分析了以ALEXI模型为代表的双源模型的发展过程及应用领域，指出了ALEXI模型在陆气相互作用研究中的优劣。
中文关键词：
洲际尺度，热红外遥感，ALEXI模型，陆气相互作用
KeyWords：
continental scale, thermal remote sensing, ALEXI model, land-atmospheric interaction
Abstract：
Land surface process and climate are linked by surface energy balance, which is the key physical process for coupling between land surface models and climate models. However, field measurements of land-atmosphere interactions, based on a meteorological station are usually limited by their spatial scale for regional climate analysis. In contrast, two-source energy balance models (TSEB), based on remote sensing, perform well in local surface energy balance, which has been widely used in agriculture and water resources to monitor local or regional evapotranspiration variation, and its results (soil heat flux, sensible heat flux, latent heat flux, etc.) could become the data sources for climate change research. This study tries to analyze the differences of physical process between ordinary two-source energy balance model (e.g. N95) and Atmosphere-Land Exchange Inversion Model (ALEXI) to examine how to apply ALEXI model to retrieval land-atmosphere interactions in the continental scale, and further explore the new development of ALEXI model to examine how to make it better for future climate research.