Validation of Global Moderate-Resolution FAPAR Products over Boreal Forests in North America Using Harmonized Landsat and Sentinel-2 Data
文献类型：期刊论文
| 作者 | Zhang, Yinghui1,2,3,4,5,6; Fang, Hongliang3,6; Hu, Zhongwen1,2,4,5; Wang, Yao3,6; Li, Sijia3,6; Wu, Guofeng1,2,4,5 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 17期号:15页码:2658 |
| 关键词 | FAPAR validation forest global FAPAR products Harmonized Landsat and Sentinel-2 (HLS) imagery AmeriFlux |
| DOI | 10.3390/rs17152658 |
| 产权排序 | 4 |
| 文献子类 | Article |
| 英文摘要 | The fraction of absorbed photosynthetically active radiation (FAPAR) stands as a pivotal parameter within the Earth system, quantifying the energy exchange between vegetation and solar radiation. Accordingly, there is an urgent need for comprehensive validation studies to accurately quantify uncertainties and improve the reliability of FAPAR-based applications. This study validated five global FAPAR products, MOD15A2H, MYD15A2H, VNP15A2H, GEOV2, and GEOV3, over four boreal forest sites in North America. Qualitative quality flags (QQFs) and quantitative quality indicators (QQIs) of each product were analyzed. Time series high-resolution reference FAPAR maps were developed using the Harmonized Landsat and Sentinel-2 dataset. The reference FAPAR maps revealed a strong agreement with the in situ FAPAR from AmeriFlux (correlation coefficient (R) = 0.91; root mean square error (RMSE) = 0.06). The results revealed that global FAPAR products show similar uncertainties (RMSE: 0.16 +/- 0.04) and moderate agreement with the reference FAPAR (R = 0.75 +/- 0.10). On average, 34.47 +/- 6.91% of the FAPAR data met the goal requirements of the Global Climate Observing System (GCOS), while 54.41 +/- 6.89% met the threshold requirements of the GCOS. Deciduous forests perform better than evergreen forests, and the products tend to underestimate the reference data, especially for the beginning and end of growing seasons in evergreen forests. There are no obvious quality differences at different QQFs, and the relative QQI can be used to filter high-quality values. To enhance the regional applicability of global FAPAR products, further algorithm improvements and expanded validation efforts are essential. |
| URL标识 | 查看原文 |
| WOS关键词 | LEAF-AREA INDEX ; PHOTOSYNTHETICALLY ACTIVE RADIATION ; ESSENTIAL CLIMATE VARIABLES ; TIME-SERIES ; SURFACE REFLECTANCE ; ABSORBED PAR ; GEOV1 LAI ; FRACTION ; MODIS ; CANOPY |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:001549668400001 |
| 出版者 | MDPI |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215645]  |
| 专题 | 资源与环境信息系统国家重点实验室_外文论文 |
| 通讯作者 | Hu, Zhongwen |
| 作者单位 | 1.Shenzhen Univ, Shenzhen Key Lab Spatial Smart Sensing & Serv, Shenzhen 518060, Peoples R China; 2.Shenzhen Univ, MNR Key Lab Geoenvironm Monitoring Great Bay Area, Shenzhen 518060, Peoples R China; 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 4.Shenzhen Univ, Guangdong Key Lab Urban Informat, Shenzhen 518060, Peoples R China; 5.Shenzhen Univ, Sch Architecture & Urban Planning, Shenzhen 518060, Peoples R China 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, LREIS, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhang, Yinghui,Fang, Hongliang,Hu, Zhongwen,et al. Validation of Global Moderate-Resolution FAPAR Products over Boreal Forests in North America Using Harmonized Landsat and Sentinel-2 Data[J]. REMOTE SENSING,2025,17(15):2658. |
| APA | Zhang, Yinghui,Fang, Hongliang,Hu, Zhongwen,Wang, Yao,Li, Sijia,&Wu, Guofeng.(2025).Validation of Global Moderate-Resolution FAPAR Products over Boreal Forests in North America Using Harmonized Landsat and Sentinel-2 Data.REMOTE SENSING,17(15),2658. |
| MLA | Zhang, Yinghui,et al."Validation of Global Moderate-Resolution FAPAR Products over Boreal Forests in North America Using Harmonized Landsat and Sentinel-2 Data".REMOTE SENSING 17.15(2025):2658. |
入库方式： OAI收割
来源：地理科学与资源研究所
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