Global Change Master Directory (GCMD)

Data Sets

Services / Tools

Ancillary Descriptions

Are you using a browser that doesn't support JavaScript or have you disabled JavaScript?

If you have disabled JavaScript, you must re-enable JavaScript to use this page.
Or you can view this record using the Text Only Format.

NLDAS Noah Land Surface Model L4 Hourly 0.125 x 0.125 degree V002 (NLDAS_NOAH0125_H) at GES DISC
Entry ID: GES_DISC_NLDAS_NOAH0125_H_V002

[ Get Data ]
[ Update this Record ]

Summary

Abstract: This data set contains a series of land surface parameters simulated
from the Noah land-surface model (LSM) for Phase 2 of the North
American Land Data Assimilation System (NLDAS-2). The data are in
1/8th degree grid spacing and range from Jan 1979 to the present.
The temporal resolution is hourly. The file format is WMO GRIB-1.

Details about the NLDAS-2 configuration of the Noah LSM can be
found in Xia et al. (2012).

The Noah model was developed as the land component of the NOAA NCEP
mesoscale Eta model [Betts et al. (1997); Chen et al. (1997); Ek et
al. (2003)]. As used in NLDAS-2, recent modifications were made to
Noah's cold-season [Livneh et al. (2010)] and warm-season [Wei et
al. (2012)] parameterizations. Noah serves as the land component in the
evolving Weather Research and Forecasting (WRF) regional atmospheric
model, the NOAA NCEP coupled Climate Forecast System (CFS), and the
Global Forecast System (GFS). The model simulates the soil freeze-thaw
process and its impact on soil heating/cooling and transpiration,
following Koren et al. (1999). The model has four soil layers with
spatially invariant thicknesses of 10, 30, 60, and 100 cm. The first
three layers form the root zone in non-forested regions, with the fourth
layer included in forested regions.

The Noah LSM was forced by the hourly NLDAS-2 forcing "File A" files,
and contains fifty-two fields. The data set applies a user-defined
parameter table to indicate the contents and parameter number. The
following table shows a list of parameters, their Product Definition
Section (PDS) IDs and units.

PDS_IDs:Short_Name:Full_Name [Unit]
179:ACONDsfc:Aerodynamic conductance [m/s]
84:ALBDOsfc:Albedo [%]
162:ARAINsfc:Rainfall (unfrozen precipitation) [kg/m^2]
161:ASNOWsfc:Snowfall (frozen precipitation) [kg/m^2]
148:AVSFTsfc:Average surface skin temperature [K]
234:BGRUNsfc:Subsurface runoff (baseflow) [kg/m^2]
181:CCONDsfc:Canopy conductance [m/s]
223:CNWATsfc:Plant canopy surface water [kg/m^2]
205:DLWRFsfc:Longwave radiation flux downwards (surface) [W/m^2]
204:DSWRFsfc:Shortwave radiation flux downwards (surface) [W/m^2]
199:EVBSsfc:Direct evaporation from bare soil [W/m^2]
200:EVCWsfc:Canopy water evaporation [W/m^2]
57:EVPsfc:Total evapotranspiration [kg/m^2]
155:GFLUXsfc:Ground heat flux [W/m^2]
182:LAIsfc:Leaf area index (0-9) [unitless]
121:LHTFLsfc:Latent heat flux [W/m^2]
151:LSOIL0_10cm:0-10 cm liquid soil moisture content (non-frozen) [kg/m^2]
151:LSOIL10_40cm:10-40 cm liquid soil moisture content (non-frozen) [kg/m^2]
151:LSOIL40_100cm:40-100 cm liquid soil moisture content (non-frozen) [kg/m^2]
151:LSOIL100_200cm:100-200 cm liquid soil moisture content (non-frozen) [kg/m^2]
207:MSTAV0_100cm:0-100 cm Moisture availability [%]
207:MSTAV0_200cm:0-200 cm total column Moisture availability [%]
112:NLWRSsfc:Longwave radiation flux net (surface) [W/m^2]
111:NSWRSsfc:Shortwave radiation flux net (surface) [W/m^2]
145:PEVPRsfc:Potential evaporation rate [W/m^2]
248:RCQsfc:Humidity parameter in canopy conductance [fraction]
246:RCSsfc:Solar parameter in canopy conductance [fraction]
249:RCSOLsfc:Soil moisture parameter in canopy conductance [fraction]
247:RCTsfc:Temperature parameter in canopy conductance [fraction]
255:RSMACRsfc:Relative soil moisture availability control factor [0-1]
203:RSMINsfc:Minimal stomatal resistance [s/m]
250:RZSMgnd:Root zone soil moisture [kg/m^2]
198:SBSNOsfc:Sublimation (evaporation from snow) [W/m^2]
122:SHTFLsfc:Sensible heat flux [W/m^2]
66:SNODsfc:Snow depth [m]
229:SNOHFsfc:Snow phase-change heat flux [W/m^2]
99:SNOMsfc:Snow melt [kg/m^2]
238:SNOWCsfc:Snow cover [fraction]
86:SOILM0_10cm:0-10 cm layer 1 Soil moisture content [kg/m^2]
86:SOILM0_100cm:0-100 cm top 1 meter Soil moisture content [kg/m^2]
86:SOILM0_200cm:0-200 cm total column Soil moisture content [kg/m^2]
86:SOILM10_40cm:10-40 cm layer 2 Soil moisture content [kg/m^2]
86:SOILM40_100cm:40-100 cm layer 3 Soil moisture content [kg/m^2]
86:SOILM100_200cm:100-200 cm layer 4 Soil moisture content [kg/m^2]
235:SSRUNsfc:Surface runoff (non-infiltrating) [kg/m^2]
210:TRANSsfc:Transpiration [W/m^2]
85:TSOIL0_10cm:0-10 cm Soil temperature [K]
85:TSOIL10_40cm:10-40 cm Soil temperature [K]
85:TSOIL40_100cm:40-100 cm Soil temperature [K]
85:TSOIL100_200cm:100-200 cm Soil temperature [K]
87:VEGsfc:Vegetation [fraction]
65:WEASDsfc:Accumulated snow water-equivalent [kg/m^2]

WGRIB or other GRIB reader is required to read the files.
For more information, please see:
http://ldas.gsfc.nasa.gov/faq/#Tools

Related URL

Link: GET DATA

Link: VIEW PROJECT HOME PAGE

Link: VIEW RELATED INFORMATION
Description: Information about NLDAS-2 models.

Link: VIEW RELATED INFORMATION > USER'S GUIDE
Description: README document for NLDAS Phase 2 data sets.

Geographic Coverage

N: 53.0 S: 25.0 E: -67.0 W: -125.0

Data Set Citation

Dataset Originator/Creator: NCEP/EMC
Dataset Title: NLDAS Noah Land Surface Model L4 Hourly 0.125 x 0.125 degree
Dataset Release Date: 03.01.2012
Dataset Release Place: Greenbelt, Maryland, USA
Dataset Publisher: Goddard Earth Sciences Data and Information Services Center (GES DISC)
Version: 002
Online Resource: http://disc.sci.gsfc.nasa.gov/hydrology

Temporal Coverage

Start Date: 1979-01-02

Data Resolution
Latitude Resolution: 0.125 degree
Longitude Resolution: 0.125 degree
Temporal Resolution: hr

Science Keywords

ATMOSPHERE >ATMOSPHERIC WATER VAPOR >EVAPORATION    [Definition]

ATMOSPHERE >ATMOSPHERIC WATER VAPOR >EVAPOTRANSPIRATION    [Definition]

ATMOSPHERE >PRECIPITATION >RAIN    [Definition]

ATMOSPHERE >PRECIPITATION >SNOW    [Definition]

ATMOSPHERE >ATMOSPHERIC RADIATION >HEAT FLUX    [Definition]

ATMOSPHERE >ATMOSPHERIC RADIATION >LONGWAVE RADIATION    [Definition]

ATMOSPHERE >ATMOSPHERIC RADIATION >SHORTWAVE RADIATION    [Definition]

BIOSPHERE >VEGETATION >CANOPY CHARACTERISTICS    [Definition]

BIOSPHERE >VEGETATION >LEAF CHARACTERISTICS    [Definition]

BIOSPHERE >VEGETATION >VEGETATION COVER    [Definition]

CRYOSPHERE >SNOW/ICE >SNOW COVER    [Definition]

CRYOSPHERE >SNOW/ICE >SNOW DEPTH    [Definition]

CRYOSPHERE >SNOW/ICE >SNOW MELT    [Definition]

TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW WATER EQUIVALENT    [Definition]

TERRESTRIAL HYDROSPHERE >SURFACE WATER >RUNOFF    [Definition]

LAND SURFACE >LAND TEMPERATURE >LAND SURFACE TEMPERATURE    [Definition]

LAND SURFACE >SOILS >SOIL MOISTURE/WATER CONTENT    [Definition]

LAND SURFACE >SOILS >SOIL TEMPERATURE    [Definition]

LAND SURFACE >SURFACE RADIATIVE PROPERTIES >ALBEDO    [Definition]

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Project

EOSDIS >Earth Observing System Data Information System    [Information]

ESIP >Earth Science Information Partners Program    [Information]

NLDAS >North American Land Data Assimilation System    [Information]

CWIC >CEOS WGISS Integrated Catalog    [Information]

Quality

The data are provisional and subject to change as model improvements are implemented and new input data sets become available.

Access Constraints

None

Use Constraints

None

Keywords

Hydrology

Data Set Progress

IN WORK

Originating Center

NCEP/EMC

Data Center

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA [Information]
Data Center URL: http://disc.gsfc.nasa.gov/

Data Center Personnel

Name: GES DISC HELP DESK SUPPORT GROUP
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

Distribution

Distribution_Media: Online (HTTP)
Distribution_Format: GRIB
Fees: No Fee

Personnel

GES DISC HELP DESK SUPPORT GROUP
Role: TECHNICAL CONTACT
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

Creation and Review Dates

DIF Creation Date: 2011-08-05

Last DIF Revision Date: 2012-06-04

[ Update this Record ]