Estimating photosynthetic light-use efficiency of Changbai Mountain by using MODIS-derived photochemical reflectance index
Estimating photosynthetic light-use efficiency of Changbai Mountain by using MODIS-derived photochemical reflectance index
复制标题
利用MODIS光化学反射指数估算长白山光合光利用效率
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Wei Gao
中科院分区：
文献类型：
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作者：
Xiao;Zhiqiang Gao;Wei Gao
利用长白站涡动相关通量塔观测到的LUE与MODIS反演的定标光化学反射指数（sPRI）之间的关系，提出了一种高时空分辨率LUE的估算方法。利用MODIS海洋波段11在531 nm，我们试图检测冠层反射率的变化与叶黄素循环。在测试后的MODIS波段12和13作为参考波段，因为570 nm的参考波段，已被确定为最佳的计算PRI在早期的研究中没有在MODIS上，MODIS sPRI和LUE之间的强相关性被发现只有在后向散射反射场景时，波段13（667 nm）作为参考波段，相关系数为0.86。该方法反演的区域土地利用效率能较好地反映区域土地利用效率的空间分布变化。
In this paper, we develop a method of estimating high temporal-spatial resolution LUE based on the relationship between LUE obtained from Changbai site eddy covariance flux tower and MODIS-derived values of scaled Photochemical Reflectance Index (sPRI). Using MODIS ocean band 11 at 531nm, we tried to detect variations in canopy reflectance related to the xanthophyll cycle. After test MODIS bands 12 and 13 as the reference band because the 570 nm reference band that had been determined to be optimum for calculating PRI in earlier studies is not available on MODIS, strong correlation between MODIS-sPRI and LUE were found only for backscatter reflectance scenes when band 13 (667nm) was used as the reference band with the relationship coefficient is 0.86. Accoring to the method, the retrieved regional LUE can reflect the spatial distribution variation.