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

作　　者：胡永红[1] 贾根锁[2] 

机构地区：[1]中国科学院数字地球重点实验室,中国科学院对地观测与数字地球科学中心,北京100094 [2]中国科学院东亚区域气候-环境重点实验室,中国科学院大气物理研究所,北京100029

出　　处：《气象科技进展》2012年第2期13-18,共6页Advances in Meteorological Science and Technology

基　　金：国家重点基础研究发展计划(2009CB723904);中科院战略性先导科技专项(XDA05090203)

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 InversionModel)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。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.

关 键 词：洲际尺度 热红外遥感 alexi模型 陆气相互作用 

分 类 号：P437[天文地球—大气科学及气象学]