北京大学学报(自然科学版)

大孔径闪烁仪湍流通量印痕模型的建立与应用

彭谷亮1,蔡旭晖1,3,刘绍民2   

  1. 1北京大学环境科学系,北京,100871;2北京师范大学国家遥感科学重点实验室,地理学与遥感科学学院,北京,100875;3通讯作者,E-mail:xhcai@pku.edu.cn
  • 收稿日期:2007-01-04 出版日期:2007-11-20 发布日期:2007-11-20

A Flux Footprint Model for Large Aperture Scintillometer

PENG Guliang1,CAI Xuhui1,3,LIU Shaomin2   

  1. 1 Department of Environment Sciences, Peking University, Beijing, 100871; 2 State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing, 100875; 3 Corresponding Author, E-mail: xhcai@pku.edu.cn
  • Received:2007-01-04 Online:2007-11-20 Published:2007-11-20

摘要: 针对近年兴起的适用于大范围区域平均通量观测的大孔径闪烁仪 (LAS),建立了一个基于欧拉分析方法的LAS印痕模型,用于对LAS测量数据的印痕分析和质量控制。作者介绍模式的建立方法并对模式的输入参数进行了讨论。另外,应用LAS印痕模式来分析2005年小汤山非均匀下垫面的观测实验数据,并与涡动相关数据进行线性回归分析,获得较好的相关性。结果显示该 LAS印痕模型在观测数据的分析中有很大的实用价值,适用于非均匀下垫面的研究。

关键词: 印痕分析, 大孔径闪烁仪(LAS), 区域平均通量, 空间代表性, 非均匀

Abstract: The large aperture scintillometer (LAS) is a versatile instrument to measure area-average heat fluxes over heterogeneous surface. In order to analyze the source area of LAS data, a new Eulerian analytical footprint model is developed. The parameters of the LAS footprint are discussed in detail and some outcome of the model application over a heterogeneous field experiment are shown. The good agreement of the results demonstrates that this footprint model is an effective and practical tool for complex surface study.

Key words: footprint analysis, LAS, area-average heat flux, spatial representative, heterogeneous

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