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. GLDAS-2.2 is new to the GES DISC archive and currently includes a main product from CLSM-F2.5 with Data Assimilation for the Gravity Recovery and Climate Experiment (GRACE-DA) from February 2003 to present. The GLDAS-2.2 data are available in two production streams: one with GRACE data assimilation outputs (the main production stream), and one without GRACE-DA (the early production stream). Since the GRACE data have a 2-6 month latency, the GLDAS-2.2 data are first created without GRACE-DA, and are designated as the Early Product (EP), with about 1 month latency. Once the GRACE data become available, the GLDAS-2.2 data are processed with GRACE-DA in the main production stream and are removed from the Early Product archive. The GLDAS-2.2 GARCE-DA product was simulated with Catchment-F2.5 in Land Information System (LIS) Version 7. The data product contains 24 land surface fields from February 1, 2003 to present. The simulation started on February 1, 2003 using the conditions from the GLDAS-2.0 Daily Catchment model simulation, forced with the meteorological analysis fields from the operational European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System. The total terrestrial water anomaly observation from GRACE satellite was assimilated (Li et al, 2019). Due to the data agreement with ECMWF, this GLDAS-2.2 daily product does not include the meteorological forcing fields. The GLDAS-2.2 data are archived and distributed in NetCDF format.
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Spatial Extent: | Bounding Rectangle: N: 90 S: -60 E: 180 W: -180 |
Data Format(s): | Distribution: netCDF |
Temporal Extent: | Platform(s): | Catchment-LSM | |
Data Center(s): | NASA/GSFC/SED/ESD/GCDC/GESDISC | Instrument(s): | NOT APPLICABLE |
Version: | 2.2 |
10.5067/TXBMLX370XX8
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Last Revision |
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The Earth Observing System Data and Information System (EOSDIS) data use policy for NASA data can be accessed at https://earthdata.nasa.gov/earth-observation-data/data-use-policy. For information on how to properly cite and acknowledge data from the NASA GES DISC, refer to https://disc.gsfc.nasa.gov/information/documents?title=data-policy.
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Title: Global GRACE data assimilation for groundwater and drought monitoring: Advances and challenges
Publication Date: 2019-01-01
Author(s): Li, B., M. Rodell, S. Kumar, H. Beaudoing, A. Getirana, B. F. Zaitchik, et al.
DOI: 10.1029/2018wr024618
Title: High resolution CSR GRACE RL05 mascons. Journal of Geophysical Research
Publication Date: 2016-01-01
Author(s): Save, H., S. Bettadpur and B. D. Tapley
DOI: 10.1002/2016JB013007
Project Short Name | Campaigns | Project Dates |
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GLDAS | No campaigns listed. | No dates provided. |
Coverage Type | Zone Identifier | Geometry | Granule Representation |
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HORIZONTAL | CARTESIAN | CARTESIAN |
This data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
Greenbelt,
MD
20771
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
Greenbelt,
MD
20771
Format: netCDF
Format Type: Native
Media: Online Archive
Fees: No Fee