Description
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, vary for different GLDAS-2.2 products.
This data set, GLDAS-2.0 0.25 degree daily, contains a series of land surface parameters simulated from the Catchment Land Surface Model 3.6, and currently covers from January 1948 to December 2014.
The GLDAS-2.0 model simulations were initialized on January 1, 1948, using soil moisture and other state fields from the LSM climatology for that day of the year. The simulations were forced by the global meteorological forcing data set from Princeton University (Sheffield et al., 2006). Each simulation uses the common GLDAS data sets for land water mask (MOD44W: Carroll et al., 2009) and elevation (GTOPO30) along with the model default land cover and soils datasets. Catchment model uses the Mosaic land cover classification and soils, topographic, and other model-specific parameters were derived in a consistent manner as in the NASA/GMAO’s GEOS-5 climate modeling system. The MODIS based land surface parameters are used in the current GLDAS-2.0 and GLDAS-2.1 products.
The GLDAS-2.0 data are archived and distributed in netCDF format.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| This dataset's landing page | HTML | Access the dataset landing page from the GES DISC website. | Open resource |
| View documentation related to this dataset | HTML | GES DISC Hydrology Documentation | Open resource |
| View this dataset's how-to documentation | HTML | How to read and plot the data. | Open resource |
| Get a related visualization | PNG | GLDAS-2.0 Catchment daily 0.25 degree root zone soil moisture content [kg m-2] for Jan. 01, 1948. | Open resource |
| Get a related visualization through GIOVANNI | HTML | The GES-DISC Interactive Online Visualization ANd aNalysis Interface (Giovanni) is a web-based tool that allows users to interactively visualize and analyze data. | Open resource |
| Download this dataset through a directory map | HTML | Access the data via HTTPS. | Open resource |
| View this dataset's read me document | README Document | Open resource | |
| Use GRADS DATA SERVER (GDS) to access the dataset's data | HTML | The GrADS Data Server (GDS) is another form of OPeNDAP that provides subsetting and some analysis services across the Internet. | Open resource |
| Use OPeNDAP to access the dataset's data | HTML | Access the data via the OPeNDAP protocol. | Open resource |
| Use THREDDS DATA to download the dataset's data | HTML | Time aggregated THREDDS Data Server (TDS) | Open resource |
| The dataset's project home page | HTML | GLDAS Project Web Site | Open resource |
| Google Scholar search results | HTML | Search results for publications that cite this dataset by its DOI. | Open resource |
| Download this dataset through Earthdata Search | HTML | Use the Earthdata Search Client (EDSC) to find and retrieve data sets across multiple data centers. | Open resource |