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将大孔径闪烁仪(LAS)观测数据应用在陆面模式验证中对更好地认识和描述陆面过程在气候变化中的作用有着重要意义。以中国北方2个LAS观测站——密云和阿柔为例,分别设定一个公里尺度(1 km2)的研究区域,采用陆面模式SiB2,综合利用站点观测数据、实地调查数据及卫星遥感数据,对陆面过程进行了模拟,并利用LAS和涡动相关仪(EC)观测的显热通量对模拟结果进行了评估,结果表明:SiB2模式能够对阿柔和密云显热通量的总体情况、日变化情况及季节变化情况进行较好的模拟;利用LAS显热通量进行较大尺度模拟验证,能够在很大程度上避免EC能量不闭合及其观测尺度与模式模拟尺度不匹配在验证中所造成的偏差,验证效果更好。
The application of large aperture scintillator (LAS) data in land surface model validation is of great importance to better understand and describe the role of land surface processes in climate change. Taking the two LAS observatories in northern China, Miyun and A-soft as examples, a study area of one kilometer (1 km2) is set up respectively. The land surface model SiB2 is used to comprehensively utilize site observation data, field survey data and satellite remote sensing data , The land surface process was simulated and the simulation results were evaluated by using the sensible heat fluxes observed by LAS and eddy coherence analyzer (EC). The results show that the SiB2 model can give an overall analysis of the sensible heat fluxes , Diurnal variation and seasonal variation were simulated well. Using LAS sensible heat flux to conduct large-scale simulation verification can largely avoid the EC energy non-closure and the mismatch between its observed scale and model simulation scale In the resulting deviation, validation better.