Monthly Quality-filtered Aggregation of NOAA Climate Data Record (CDR) of AVHRR (Version 5) and VIIRS (Version 1) Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR)

This dataset contains gridded monthly Leaf Area Index (LAI) derived from the daily NOAA Climate Data Record (CDR) of AVHRR (Version 5) and VIIRS (Version 1) Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). This data record spans from 1981 to 2024 using data from NOAA polar orbiting satellites: NOAA-7, -9, -11, -14, -16, -17, -18, -19 and S-NPP. The data are projected on a 0.05 degree x 0.05 degree global grid, as in the original CDR. The original CDR is one of the Land Surface CDR products produced by the NASA Goddard Space Flight Center (GSFC) and the University of Maryland (UMD), which is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program. This dataset is in the netCDF-4 file format following ACDD and CF Conventions. This dataset has applied quality assurance information to only include "OK" data from the original CDR in the monthly aggregation.

本数据集包含网格化月度叶面积指数（Leaf Area Index, LAI）数据，其源自基于美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）气候数据记录（Climate Data Record, CDR）的每日高级甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR，第5版）与可见光红外成像辐射仪套件（Visible Infrared Imaging Radiometer Suite, VIIRS，第1版）叶面积指数及吸收光合有效辐射比例（Fraction of Absorbed Photosynthetically Active Radiation, FAPAR）数据。本数据序列的时间跨度为1981年至2024年，所用数据来自NOAA极轨卫星：NOAA-7、-9、-11、-14、-16、-17、-18、-19以及S-NPP卫星。如原始气候数据记录所述，本数据集采用0.05°×0.05°的全球网格进行投影。原始气候数据记录是美国国家航空航天局（National Aeronautics and Space Administration, NASA）戈达德太空飞行中心（Goddard Space Flight Center, GSFC）与马里兰大学（University of Maryland, UMD）联合产出的地表气候数据记录产品之一，配套包含针对NOAA CDR项目的算法文档、数据流图与源代码。本数据集采用netCDF-4文件格式，符合ACDD与CF规范。本数据集已应用质量控制信息，在月度聚合过程中仅保留原始CDR中标记为"OK"的有效数据。