NPP Multi-Biome: Global Primary Production Data Initiative Products, R2

Net primary productivity (NPP) estimates were compiled by the Global Primary Production Data Initiative (GPPDI). The database covers 2,523 individual sites and 5,164 half-degree grid cells and underwent extensive review under the Ecosystem Model-Data Intercomparison (EMDI) process. The GPPDI database includes NPP measurements that were collected over a long time period by many investigators using a variety of methods. The measurements are categorized as either Class A, from intensively studied sites; Class B, from extensive sites; or reported as Class C, 0.5 latitude-longitude grid cells.

The data set contains six comma-separated files (.csv format). There are two files for each class. One file for each class contains site locations, elevation, NPP estimates, climate data, biome and dominant species information, and references. The other file for each class contains model validation outlier flags derived from site-specific reviews.

This document and a companion file (Olson et al., 2001) describe the compilation of NPP estimates under the GPPDI. The results of the EMDI review and outlier analysis produced a refined set of NPP estimates and model driver data (the EMDI database; Olson et al., 2001; 2013). Another ORNL DAAC data set (Zheng et al., 2013) contributed to the compilation of GPPDI.

Revision Notes: This data set has been revised to correct previously reported ANPP, BNPP, and TNPP estimates for three OTTER Transect sites, USA, in the Class A NPP data file and BNPP, and TNPP estimates for Vindhyan, India, in the Class B NPP data file. Please see the Data Set Revisions section of this document for detailed information.

全球初级生产力数据倡议（GPPDI）编制了净初级生产力（NPP）估计值。该数据库涵盖了2,523个独立站点和5,164个半度网格单元，并在生态系统模型-数据互比（EMDI）过程中接受了广泛的审查。GPPDI数据库包括了由众多研究者使用多种方法在长时间内收集的NPP测量值。这些测量值被划分为A类，来自深入研究站点；B类，来自广泛研究站点；或报告为C类，0.5纬度-经度网格单元。该数据集包含六个以逗号分隔的文件（.csv格式）。每个类别包含两个文件。每个类别的其中一个文件包含了站点位置、海拔、NPP估计值、气候数据、生物群落和优势物种信息以及参考文献。另一个文件则包含了来自特定站点审查的模型验证异常标志。本文件及其配套文件（Olson等，2001年）描述了在GPPDI下NPP估计值的编制。EMDI审查和异常分析的结果产生了一组精炼的NPP估计值和模型驱动数据（EMDI数据库；Olson等，2001年；2013年）。另一个橡树岭国家实验室数据集（Zheng等，2013年）为GPPDI的编制做出了贡献。修订说明：本数据集已修订，以纠正先前报告的三个OTTER横断面站点（美国A类NPP数据文件中的ANPP、BNPP和TNPP估计值）以及印度Vindhyan的B类NPP数据文件中的BNPP和TNPP估计值。请参阅本文件的数据集修订部分以获取详细信息。