【作者】 宫丽娟； 刘绍民；

【Author】 GONG Li-Juan, LIU Shao-Min (State key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875)

【机构】 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；

【摘要】 非均匀下垫面通量观测结果代表了发生在特定下垫面或某一部分下垫面的综合物理过程,由此必须考虑通量观测的空间代表性。本文通过对北京密云通量站2006年7月至2007年6月12个月的连续通量观测资料,应用解析通量足迹模型对涡动相关仪和大孔径闪烁仪通量观测的空间代表性做了初步的分析。结果表明:①对涡动相关仪通量贡献区的分析表明,李子林为主要的通量贡献源,其次为玉米地/裸地和苹果林。通量贡献最大的点分布在观测塔西南面的李子林。②对大孔径闪烁仪的分析表明,LAS的通量贡献区沿光线路径分布,长约2060米,宽约560米,主要的通量贡献源为玉米地/裸地,其次是苹果林和李子林。通量贡献最大的点分布在LAS光线路径西侧的108米,位于苹果林内。更多还原

【Abstract】 As fluxes measurement above inhomogeneous surface represents an integrated physical process occuring on a specific part or a cetain part of the surface, it must take into account the flux spatial representativeness. Based on the continuous 12 months of flux observation data from July 2006 to June 2007 of Beijing Miyun flux station, fluxes spatial representativeness of eddy covariance and large aperture scintillometer are analysed preliminarily using a analytic footprint model. The results show: ①The analysis of eddy covariance contribution area shows that Li Lin is the main source of flux contribution, followed by corn/bare land and apple forest. The biggest contribution flux points distribute within Li Lin, locating in the southwest of the observation tarim. ② The analysis of large aperture scintillometer shows that the flux contribution area of LAS distribute along the path of light, which about 2,060 m long, 560 m wide, and the main source of flux contribution is corn/bare soil, followed by apple and Li Lin. The biggest contribution flux point distribute in the apple lin, about 108 m away from the west side of LAS light path.更多还原