中国16m（2019年-2021年）/全球1km（2019-2020）光合有效辐射吸收比例产品数据集

植被光合有效辐射吸收比例也称光合有效辐射吸收比率(Fraction of Absorbed Photosynthetically Active Radiation)，简称FAPAR或FPAR，是指植被吸收的光合有效辐射PAR(Photosynthetically Active Radiation)占到达植被冠层顶部光合有效辐射的比例。FAPAR是生态系统生产力与碳循环的核心指标，也是全球气候变化监测模型与极端时间评估的重要输入，能够为作物生长监测与产量预测、森林健康评估、生物多样性保护与生态恢复提供有别于叶面积指数的冠层光合吸收特性等信息支撑。
本数据集主要应用场景如下：
碳源汇监测
为植被总初级生产力/净初级生产力反演及碳源汇监测提供多时空尺度驱动数据。
林业和森林管理
可以协助了解森林的碳固定能力，评估森林健康状况；利用FAPAR吸收比例估算森林的生物量，对于森林资源管理和可持续利用至关重要。

The Fraction of Absorbed Photosynthetically Active Radiation (also referred to as the ratio of absorbed photosynthetically active radiation, abbreviated as FAPAR or FPAR) refers to the proportion of photosynthetically active radiation (PAR, Photosynthetically Active Radiation) absorbed by vegetation relative to the total PAR reaching the top of the vegetation canopy. FAPAR is a core indicator of ecosystem productivity and the carbon cycle, as well as a critical input for global climate change monitoring models and extreme event assessments. It provides information support including canopy photosynthetic absorption characteristics (distinct from Leaf Area Index, LAI) for crop growth monitoring and yield prediction, forest health assessment, biodiversity conservation and ecological restoration.
The main application scenarios of this dataset are as follows:
1. Carbon source-sink monitoring: Provide multi-spatiotemporal scale driving data for the retrieval of vegetation gross primary productivity (GPP)/net primary productivity (NPP) and carbon source-sink monitoring.
2. Forestry and forest management: Assist in understanding the carbon sequestration capacity of forests and evaluating forest health status; estimating forest biomass using the FAPAR absorption ratio is of critical importance for forest resource management and sustainable utilization.