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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Synergistic algorithm for estimating vegetation canopy leaf area index and fraction of absorbed photosynthetically active radiation from MODIS and MISR data
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Synergistic algorithm for estimating vegetation canopy leaf area index and fraction of absorbed photosynthetically active radiation from MODIS and MISR data

机译：利用MODIS和MISR数据估算植被冠层叶面积指数和光合有效吸收辐射分数的协同算法。

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摘要

A synergistic algorithm for producing global leaf area index and fraction of absorbed photosynthetically active radiation fields from canopy reflectance data measured by MODIS (moderate resolution imaging spectroradiometer) and MISR (multiangle imaging spectroradiometer) instruments aboard the EOS-AM I platform is described here. The proposed algorithm is based on a three-dimensional formulation of the radiative transfer process in vegetation canopies. It allows the use of information provided by MODIS (single angle and up to 7 shortwave spectral bands) and MISR (nine angles and four shortwave spectral bands) instruments within one algorithm. By accounting features specific to the problem of radiative transfer in plant canopies, powerful techniques developed in reactor theory and atmospheric physics are adapted to split a complicated three-dimensional radiative transfer problem into two independent, simpler subproblems, the solutions of which are stored in the form of a look-up table. The theoretical background required for the design of the synergistic algorithm is discussed. [References: 50]
机译：本文描述了一种协同算法，该算法可通过EOS-AM I平台上的MODIS（中分辨率成像光谱仪）和MISR（多角度成像光谱仪）仪器测量的冠层反射率数据生成全局叶面积指数和吸收的光合有效辐射场的分数。所提出的算法基于植被冠层辐射传递过程的三维表达。它允许在一种算法中使用由MODIS（单角度和最多7个短波谱带）和MISR（九个角度和四个短波谱带）仪器提供的信息。通过考虑植物冠层辐射传递问题的特定特征，反应堆理论和大气物理学中开发的强大技术适用于将复杂的三维辐射传递问题分解为两个独立的，更简单的子问题，这些子问题的解决方案存储在查询表的形式。讨论了协同算法设计所需的理论背景。 [参考：50]

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