GLDAS Noah Land Surface Model L4 3 hourly 1.0 x 1.0 degree subsetted V020 (GLDAS_NOAH10_3H) at GES DISCEntry ID: GES_DISC_GLDAS_NOAH10_3H_V020
Abstract: Global Land Data Assimilation System Version 2 (hereafter, GLDAS-2) has two components: one forced entirely with the Princeton meteorological forcing data (hereafter, GLDAS-2.0), and the other forced with a combination of model and observation based forcing data sets (hereafter, GLDAS-2.1).
This data set, GLDAS-2.0 1.0 degree 3-hourly, contains a series of land surface parameters simulated from ... the Noah Model 3.3, currently covers from 1948 to 2010 and will be extended to recent years as the data set becomes available.
The model simulation was initialized on simulation date January 1, 1948, using soil moisture and other state fields from the LSM climatology for that day of the year. The simulation was forced by the global meteorological forcing data set from Princeton University (Sheffield et al., 2006). The simulation used the common GLDAS data sets for land cover (MCD12Q1: Friedl et al., 2010), land water mask (MOD44W: Carroll et al., 2009), soil texture (Reynolds, 1999), and elevation (GTOPO30). The MODIS based land surface parameters are used in the current GLDAS-2.x products while the AVHRR base parameters were used in GLDAS-1 and previous GLDAS-2 products (prior to October 2012).
The main objective for Version 2 is to create more climatologically consistent data sets using the Princeton forcing data sets extending from 1948. In Version 1, forcing sources switched several times throughout the record from 1979 to present, which introduced unnatural trends and exhibited highly uncertain forcing fields in 1995-1997. Other enhancements made in Version 2 include model version upgrade, switching to MODIS based land surface parameter data sets, and initialization of soil moisture over desert. In NOAH model, the bottom layer temperature data set was also updated. More details regarding the land surface parameter data changes at http://ldas.gsfc.nasa.gov/gldas/.
WGRIB or other GRIB reader is required to read the files. The data set applies a user-defined parameter table to indicate the contents and parameter numbers. The GRIBTAB file (http://disc.sci.gsfc.nasa.gov/hydrology/grib_tabs/gribtab_GLDAS_V2.txt) shows a list of parameters for this data set, along with their Product Definition Section (PDS) IDs and units.
There are four vertical levels for the Soil Moisture (PDS 086) and Soil Temperature (PDS 085) in the Noah GRIB files. For more information, please see the README Document at http://hydro1.sci.gsfc.nasa.gov/data/s4pa/GLDAS/GLDAS_NOAH10_M.020/... or the GrADS ctl file at ftp://hydro1.sci.gsfc.nasa.gov/data/gds/GLDAS/GLDAS_NOAH10_M.020.ctl.
Data Set Citation
Dataset Originator/Creator: Matthew Rodell and Hiroko Kato Beaudoing, NASA/GSFC/HSL
Dataset Title: GLDAS Noah Land Surface Model L4 3 hourly 1.0 x 1.0 degree Version 2.0
Dataset Series Name: GLDAS_NOAH10_3H
Dataset Release Date: 12.01.2013
Dataset Release Place: Greenbelt, Maryland, USA
Dataset Publisher: Goddard Earth Sciences Data and Information Services Center (GES DISC)
Data Presentation Form: Digital Science Data
Dataset DOI: 10.5067/L0JGCNVBNRAXOnline Resource: http://disc.sci.gsfc.nasa.gov/datacollection/GLDAS_NOAH10_3H_V020.s...
Start Date: 1948-01-01Stop Date: 2010-12-31
Latitude Resolution: 1 degree
Longitude Resolution: 1 degree
Temporal Resolution: 3 hourly
ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > EVAPOTRANSPIRATION
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN
ATMOSPHERE > PRECIPITATION > SOLID PRECIPITATION > SNOW
ATMOSPHERE > ATMOSPHERIC RADIATION > HEAT FLUX
ATMOSPHERE > ATMOSPHERIC RADIATION > LONGWAVE RADIATION
ATMOSPHERE > ATMOSPHERIC RADIATION > SHORTWAVE RADIATION
TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW WATER EQUIVALENT
TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER PROCESSES/MEASUREMENTS > RUNOFF
LAND SURFACE > SURFACE THERMAL PROPERTIES > LAND SURFACE TEMPERATURE
LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
LAND SURFACE > SOILS > SOIL TEMPERATURE
ISO Topic Category
Quality The data are provisional and subject to change as model improvements are implemented and new input data sets become available. Due to the fact that forcing data for Greenland are unreliable and the lack of a glacier/ice sheet model, snow water equivalent accumulates indefinitely in Greenland and a few other Arctic points. Therefore it is highly recommended that Greenland and other points with abnormally large snow water equivalent values be masked out when performing global analyses.
Access Constraints None
Use Constraints None
Data Set Progress
Distribution Media: Online (HTTP)
Distribution Format: GRIB
Fees: No Fee
Role: TECHNICAL CONTACT
Email: gsfc-help-disc at lists.nasa.gov
Province or State: MD
Postal Code: 20771
Role: DIF AUTHOR
Email: Hualan.Rui at nasa.gov
Province or State: MD
Postal Code: 20771
Rodell, M., P. R. Houser, U. Jambor, J. Gottschalck, K. Mitchell, C.-J. Meng, K. Arsenault, B. Cosgrove, J. Radakovich, M. Bosilovich, J. K. Entin, J. P. Walker, D. Lohmann, and D. Toll, The Global Land Data Assimilation System, Bull. Amer. Meteor. Soc., 85(3): 381-394, 2004.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2012-09-17
Last DIF Revision Date: 2016-01-20
Future DIF Review Date: 2015-05-01