The NASA GSFC Hydrological Sciences Laboratory (HSL) and the Goddard Earth Sciences Data and Information Services Center (GES DISC) are pleased to announce the release of the reprocessed Global Land Data Assimilation System Version 2.0 (GLDAS-2.0) data sets and their availability from the GES DISC Hydrology GLDAS Data Holdings.
GLDAS-2.0 is one of two components of the GLDAS Version 2 (GLDAS-2) data set, the second being GLDAS-2.1. GLDAS-2.0 is reprocessed with the updated Princeton meteorological forcing data set and upgraded Land Information System Version 7 (LIS-7). It covers the period 1948-2012, and will be extended to more recent years as corresponding forcing data become available.
This release of the reprocessed GLDAS-2.0 includes 3-hourly and monthly 0.25° x 0.25° and 1.0° x 1.0° data sets from the Noah model (Table 1). More information about GLDAS-2.0 data is available in the GLDAS-2 README document.
GLDAS-2.1, scheduled for release in 2016, is forced with a combination of model- and observation-based forcing data sets. It covers the period from 2001 to the present, with about one and half months latency; it will be updated monthly. GLDAS-2.1 is analogous to the current GLDAS Version 1 (GLDAS-1) product stream.
The GLDAS-2.0 data, along with the GLDAS-1 and other hydrology data sets, can be accessed from Hydrology Data Holdings via the following access methods:
- HTTP: Direct download
- Mirador: Search and download
- OPeNDAP: Download parameter- and spatially-subsetted data in NetCDF, binary or ASCII text.
- Giovanni: Online visualization, analysis, and inter-comparison.
- REVERB: Search and download
The previous GLDAS-020 data will remain online for the next three months, and will be removed by end of March 2016.
To determine which of the two versions of GLDAS data to use (GLDAS-1 vs. GLDAS-2), please see the GES DISC Hydrology FAQ.
The two sample images shown below are generated by Giovanni. Click on either image to view larger.
Figure 1. Long-term mean (Jan. 1948 – Dec. 2010) of total precipitation from the reprocessed GLDAS-2.0 Noah 1.0° x 1.0° monthly data.
Figure 2. Global mean time series of total precipitation from the reprocessed GLDAS-2.0 Noah 1.0° x 1.0° monthly data.
Table 1. Reprocessed GLDAS-2.0 Data Sets and Access to Each Data Product Portal
|Data set short name
|| 3-hourly 0.25ox0.25o data from Noah model
|| 03Z 01 Jan 1948 - 21Z 31 Dec 2012*
|| monthly 0.25ox0.25o data from Noah model
|| Jan1948 - Dec2012*
|| 3-hourly 1.0ox1.0o data from Noah model
|| 03Z 01 Jan 1948 - 21Z 31 Dec 2010*
|| monthly 1.0ox1.0o data from Noah model
|| Jan 1948 - Dec 2012*
Clicking on a link in Data set short name column will lead to Data Product portal for the product.
* Reprocessed GLDAS-2.0 data for 2011 and 2012 are undergoing integrity checking now, and will be available online in January 2016.
Questions or comments? Email the NASA GES DISC Help Desk: firstname.lastname@example.org