CLPX-Model: Land Data Assimilation System (LDAS) Data
Entry ID: NSIDC-0181

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Summary
Abstract: The LDAS data set contains 43 model and observation-based fields produced by the LDAS uncoupled modeling system at the NASA Goddard Space Flight Center using the Mosaic Land Surface Model (LSM). Parameters include snow cover, snow depth, snow melt, albedo, precipitation, temperature, canopy characteristics, longwave and shortwave radiation, heat flux, soil moisture, sublimation, snow water equivalent, and meteorolical parameters. Precipitation and solar radiation are observation-based, while other forcing variables (humidity, temperature, wind speed, pressure, longwave radiation) are derived from the National Centers for Environmental Prediction’s (NCEP) Eta Data Assimilation System (EDAS). All other variables in the files are from the Mosaic LSM. Data were produced at an hourly resolution from 1 January 2001 through June 2003. The LDAS data are delivered on an 1/8th-degree regular latitude/longitude grid covering the Large-Regional Study Area (LRSA), located between 38.5-42 N and 104-108.5 W. The resolution in the Y direction of each 1/8th degree LDAS pixel is 13899 meters over the whole domain. The resolution in the X direction ranges from 10878 meters at the southern edge of the LRSA to 10329 meters at the northern edge of the LRSA (it decreases as the distance between longitude lines decreases). This data set is available in ASCII format from the Land Data Assimilation Systems (LDAS) at NASA's Goddard Space Flight Center (http://ldas.gsfc.nasa.gov/). Two sample FORTRAN programs are provided for reading these ASCII gridded data. The NASA Cold Land Processes Experiment (CLPX) is a multi-sensor, multi-scale experiment that focuses on extending a local-scale understanding of water fluxes, storage, and transformations to regional and global scales. Within a framework of nested study areas in the central Rocky Mountains of the western United States, ranging from 1-ha to 160,000 km2, intensive ground, airborne, and spaceborne observations are collected. Data collection focuses on two seasons: mid-winter, when conditions are generally frozen and dry, and early spring, a transitional period when both frozen and thawed, dry and wet conditions are widespread.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: Web site for metadata and access to ftp data link.


Link: VIEW PROJECT HOME PAGE
Description: NASA Land Data Assimilation Systems (LDAS)


Link: VIEW PROJECT HOME PAGE
Description: CLPX Site


Link: VIEW PROJECT HOME PAGE
Description: Snow Water Equivalent Field Measurements


Link: VIEW PROJECT HOME PAGE
Description: Register as a CLPX user


Geographic Coverage
 N: 42.0 S: 38.5  E: -104.0  W: -108.5

Data Set Citation
Dataset Originator/Creator: Cosgrove, B.
Dataset Title: CLPX-Model: Land Data Assimilation System (LDAS) Data
Dataset Release Date: 2003-08-19
Dataset Release Place: Landover, Maryland USA
Dataset Publisher: Goddard: NASA Goddard Space Flight Center
Version: 1
Online Resource: http://nsidc.org/data/NSIDC-0181


Temporal Coverage
Start Date: 2001-01-01
Stop Date: 2003-08-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > COLORADO
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WYOMING
CONTINENT > NORTH AMERICA
GEOGRAPHIC REGION > NORTHERN HEMISPHERE


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]
LAND SURFACE >SURFACE RADIATIVE PROPERTIES >ALBEDO    [Definition]
BIOSPHERE >VEGETATION >CANOPY CHARACTERISTICS    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >EVAPORATION    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >HEAT FLUX    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY    [Definition]
LAND SURFACE >LAND TEMPERATURE >LAND SURFACE TEMPERATURE    [Definition]
BIOSPHERE >VEGETATION >LEAF CHARACTERISTICS    [Definition]
ATMOSPHERE >PRECIPITATION >PRECIPITATION AMOUNT    [Definition]
TERRESTRIAL HYDROSPHERE >SURFACE WATER >RUNOFF    [Definition]
ATMOSPHERE >PRECIPITATION >SNOW    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW COVER    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW COVER    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW DEPTH    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW DEPTH    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW ENERGY BALANCE    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW ENERGY BALANCE    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW MELT    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW MELT    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW WATER EQUIVALENT    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW WATER EQUIVALENT    [Definition]
LAND SURFACE >SOILS >SOIL MOISTURE/WATER CONTENT    [Definition]
CRYOSPHERE >FROZEN GROUND >SOIL TEMPERATURE    [Definition]
LAND SURFACE >FROZEN GROUND >SOIL TEMPERATURE    [Definition]
LAND SURFACE >SOILS >SOIL TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >SOLAR RADIATION    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >SURFACE PRESSURE    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >SURFACE WINDS    [Definition]
BIOSPHERE >VEGETATION >VEGETATION INDEX    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >VERTICAL WIND MOTION    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
BIOTA
INLAND WATERS


Platform
Models/Analyses    [Information]


Project
CLPX >Cold Land Processes Field Experiment    [Information]
ESIP >Earth Science Information Partners Program    [Information]
EOSDIS >Earth Observing System Data Information System    [Information]


Quality
All data have undergone quality control at GSFC.


Keywords
Air Temperature
Albedo
Canopy Cover
Ground Heat Flux
Heat Flux
Humidity
Latent Heat Flux
Leaf Area Index
Near-surface Air Temperatures
Precipitation
Precipitation Amount
Precipitation Type
Runoff Data
Snow
Snow Cover
Snow Depth
Snowfall
Snow Melt
Snow Pack Water Equivalent
Snow Water Equivalent
Soil Heat Flux
Soil Temperature
Soil Water Content
Solar Radiation
Surface Pressure
Surface Winds
Two-Meter Air Temperature


Data Set Progress
IN WORK


Originating Center
NSIDC


Data Center
National Snow and Ice Data Center    [Information]
Data Center URL: http://nsidc.org

Data Center Personnel
Name: NSIDC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA



Distribution
Distribution_Media: FTP


Personnel
BRIAN COSGROVE
Role: INVESTIGATOR
Phone: 301-286-5084
Email: brian.a.cosgrove at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 614.3
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


NSIDC USER SERVICES
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA


DON CLINE
Role: INVESTIGATOR
Phone: 952 361 6610 x252
Fax: 952 361 6634
Email: cline at nohrsc.nws.gov
Contact Address:
National Weather Service
National Operational Hydrologic Remote Sensing Center
1735 Lake Drive W.
City: Chanhassen
Province or State: MN
Postal Code: 55317



Creation and Review Dates
DIF Creation Date: 2003-08-19
Last DIF Revision Date: 2014-07-07

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