A Flux Footprint Model for Large Aperture Scintillometer

Acta Scientiarum Naturalium Universitatis Pekinensis

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A Flux Footprint Model for Large Aperture Scintillometer

PENG Guliang¹,CAI Xuhui^1,3,LIU Shaomin²

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

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

Abstract

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

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

CLC Number:

P 404

PENG Guliang,CAI Xuhui,LIU Shaomin. A Flux Footprint Model for Large Aperture Scintillometer[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

彭谷亮,蔡旭晖,刘绍民. 大孔径闪烁仪湍流通量印痕模型的建立与应用[J]. 北京大学学报（自然科学版）.

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A Flux Footprint Model for Large Aperture Scintillometer

大孔径闪烁仪湍流通量印痕模型的建立与应用

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