NASA GLDAS Project

NASA Global Land Data Assimilation System Version 2 (GLDAS-2) has three components: GLDAS-2.0, GLDAS-2.1, and GLDAS-2.2. GLDAS-2.0 is forced entirely with the Princeton meteorological forcing input data and provides a temporally consistent series from 1948 through 2014. GLDAS-2.1 is forced with a combination of model and observation data from 2000 to present. GLDAS-2.2 product suites use data assimilation (DA), whereas the GLDAS-2.0 and GLDAS-2.1 products are "open-loop" (i.e., no data assimilation). The choice of forcing data, as well as DA observation source, variable, and scheme, ...NASA全球陆地数据同化系统第二版（GLDAS-2）包含三个子版本：GLDAS-2.0、GLDAS-2.1与GLDAS-2.2。其中GLDAS-2.0完全以普林斯顿气象强迫输入数据作为驱动源，生成了1948年至2014年的时间一致性序列数据集。GLDAS-2.1融合模式与观测数据作为驱动数据源，时间覆盖范围为2000年至今。GLDAS-2.2系列产品采用数据同化（Data Assimilation, DA）技术，而GLDAS-2.0与GLDAS-2.1产品均采用“开环”模式（即不执行数据同化）。驱动数据的选择，以及数据同化的观测源、变量与方案……