论文标题
AVHRR/METOP的全球冠层水含量产品
A global Canopy Water Content product from AVHRR/Metop
论文作者
论文摘要
在空间和时间上显式冠层水含量（CWC）数据对于监测植被状况很重要，并且构成了研究生态系统气候相互作用的重要信息。尽管有很多努力，目前尚无用户可用的运营CWC产品。在卫星应用程序设施进行土地表面分析（LSA-SAF）的背景下，我们开发了一种算法，以基于来自先进的非常高分辨率辐射计（AVHRR）传感器的数据生产全球CWC数据集，以在板上气象运营（METOP）（METOP）卫星（METOP）组成Eumetsat Polar System（EPS）。 CWC反映了叶片水平的水条件以及与冠层结构有关的信息。对EPS/AVHRR CWC的精确评估表明，与来自加拿大Smapvex16和塞内加尔Dahra的多阶段地面数据达成了密切的一致性。本研究进一步评估了LSA-SAF产品在简化2级产品原型处理器（SL2P）产品方面的一致性，并使用来自MSI/Sentinel-2和MODIS/MODIS/MODIS/Terra和Aqua的光学数据在不同时空分辨率下在不同的时空分辨率上证明了其适用性。我们得出的结论是，EPS/AVHRR CWC产品是监测区域和全球尺度上植被水状态的有前途的工具。
Spatially and temporally explicit canopy water content (CWC) data are important for monitoring vegetation status, and constitute essential information for studying ecosystem-climate interactions. Despite many efforts there is currently no operational CWC product available to users. In the context of the Satellite Application Facility for Land Surface Analysis (LSA-SAF), we have developed an algorithm to produce a global dataset of CWC based on data from the Advanced Very High Resolution Radiometer (AVHRR) sensor on board Meteorological Operational (MetOp) satellites forming the EUMETSAT Polar System (EPS). CWC reflects the water conditions at the leaf level and information related to canopy structure. An accuracy assessment of the EPS/AVHRR CWC indicated a close agreement with multi-temporal ground data from SMAPVEX16 in Canada and Dahra in Senegal. The present study further evaluates the consistency of the LSA-SAF product with respect to the Simplified Level 2 Product Prototype Processor (SL2P) product, and demonstrates its applicability at different spatio-temporal resolutions using optical data from MSI/Sentinel-2 and MODIS/Terra and Aqua. We conclude that the EPS/AVHRR CWC product is a promising tool for monitoring vegetation water status at regional and global scales.
