Evaluating Spatial Representativeness of Station Observations for Remotely Sensed Leaf Area Index Products
文献类型：期刊论文
| 作者 | Xu, Baodong1; Li, Jing1; Liu, Qinhuo1; Huete, Alfredo R.1; Yu, Qiang1; Zeng, Yelu1; Yin, Gaofei1; Zhao, Jing1; Yang, Le1 |
| 刊名 | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
 |
| 出版日期 | 2016 |
| 卷号 | 9期号:7页码:3267-3282 |
| 通讯作者 | Li, Jing (lijing01@radi.ac.cn) |
| 英文摘要 | Continuous leaf area index (LAI) observations from global ground stations are an important reference dataset for the validation of remotely sensed LAI products. In this study, a pragmatic approach is presented for evaluating the spatial representativeness of station-observed LAI dataset in the product pixel grid. Three evaluation indicators, including dominant vegetation type percent (DVTP), relative absolute error (RAE) and coefficient of sill (CS), were established to quantify different levels of spatial representativeness. The DVTP was used to evaluate whether the station-observed vegetation type was the dominant one in the pixel grid, and the RAE and CS were applied to quantify the point-to-area consistency for a given station observation and the spatial heterogeneity caused by the different density of vegetation within the pixel, respectively. The proposed approach was applied to 25 stations from the Chinese Ecosystem Research Network, and results show significant differences of representativeness errors at different levels. The spatial representativeness for different stations varied seasonally with different vegetation growth stages due to temporal changes in heterogeneity, but the spatial representativeness remained consistent at interannual timeframes due to the relatively stable vegetation structure and pattern between adjacent years. A large error can occur in MOD15A2 product validation when the representativeness level of station LAI observations is low. This approach can effectively distinguish various levels of spatial representativeness for the station-observed LAI dataset at the pixel grid scale, which can consequently improve the reliability of LAI product validation by selecting LAI observations with a high degree of representativeness. © 2008-2012 IEEE. |
| 收录类别 | EI |
| 语种 | 英语 |
| WOS记录号 | WOS:20162402498664 |
| 源URL | [http://ir.radi.ac.cn/handle/183411/39624]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 2.100101, China 3. Center for Global Change Studies, Beijing 4.100875, China 5. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 6.100049, China 7. Plant Functional Biology and Climate Change Cluster, University of Technology, Sydney 8.NSW 9.2007, Australia 10. School of Life Sciences, University of Technology, Sydney |
| 推荐引用方式 GB/T 7714 | Xu, Baodong,Li, Jing,Liu, Qinhuo,et al. Evaluating Spatial Representativeness of Station Observations for Remotely Sensed Leaf Area Index Products[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing,2016,9(7):3267-3282. |
| APA | Xu, Baodong.,Li, Jing.,Liu, Qinhuo.,Huete, Alfredo R..,Yu, Qiang.,...&Yang, Le.(2016).Evaluating Spatial Representativeness of Station Observations for Remotely Sensed Leaf Area Index Products.IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing,9(7),3267-3282. |
| MLA | Xu, Baodong,et al."Evaluating Spatial Representativeness of Station Observations for Remotely Sensed Leaf Area Index Products".IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 9.7(2016):3267-3282. |
入库方式： OAI收割
来源：遥感与数字地球研究所
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