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CLPX-Model: Land Data Assimilation System (LDAS) Data

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Entry ID

NSIDC-0181

Summary

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.

Geographic Coverage

 

Spatial Coordinates:
N: 42°     S: 38.5°     E: -104°     W: -108.5°    

Data Set Citation

Dataset 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
Online Resource: http://nsidc.org/data/nsidc-0181.html

Temporal Coverage

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

Location Keywords

  • CONTINENT NORTH AMERICA
  • CONTINENT NORTH AMERICA UNITED STATES OF AMERICA COLORADO, WYOMING
  • GEOGRAPHIC REGION NORTHERN HEMISPHERE

Science Keywords

  • Atmosphere Atmospheric Pressure Surface Pressure
  • Atmosphere Atmospheric Radiation Heat Flux
  • Atmosphere Atmospheric Radiation Solar Radiation
  • Atmosphere Atmospheric Temperature Air Temperature
  • Atmosphere Atmospheric Water Vapor Evaporation
  • Atmosphere Atmospheric Water Vapor Humidity
  • Atmosphere Atmospheric Winds Surface Winds
  • Atmosphere Atmospheric Winds Vertical Wind Motion
  • Atmosphere Precipitation Precipitation Amount
  • Atmosphere Precipitation Snow
  • Biosphere Vegetation Canopy Characteristics
  • Biosphere Vegetation Leaf Characteristics
  • Biosphere Vegetation Vegetation Index
  • Cryosphere Frozen Ground Soil Temperature
  • Cryosphere Snow/Ice Snow Cover
  • Cryosphere Snow/Ice Snow Depth
  • Cryosphere Snow/Ice Snow Energy Balance
  • Cryosphere Snow/Ice Snow Melt
  • Cryosphere Snow/Ice Snow Water Equivalent
  • Land Surface Frozen Ground Soil Temperature
  • Land Surface Land Temperature Land Surface Temperature
  • Land Surface Soils Soil Moisture/Water Content
  • Land Surface Soils Soil Temperature
  • Land Surface Surface Radiative Properties Albedo
  • Terrestrial Hydrosphere Snow/Ice Snow Cover
  • Terrestrial Hydrosphere Snow/Ice Snow Depth
  • Terrestrial Hydrosphere Snow/Ice Snow Energy Balance
  • Terrestrial Hydrosphere Snow/Ice Snow Melt
  • Terrestrial Hydrosphere Snow/Ice Snow Water Equivalent
  • Terrestrial Hydrosphere Surface Water Runoff

Ancillary 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

Platform

  • MODELS

Project

  • CLPX Cold Land Processes Field Experiment

Quality

All data have undergone quality control at GSFC.

Data Set Progress

in work

Originating Center

NSIDC

Data Center

NASA GSFC Hydrological Sciences Branch, Laboratory for Hydrospheric Processes
Data Center URL:

Data Center Personnel

Name:
Phone:
Fax:
Email:

Distribution

Distribution Media: FTP

Personnel

Brian Cosgrove
Role: INVESTIGATOR
Phone: 1 301 286 5084
Email: brian.cosgrove@gsfc.nasa.gov
Contact Address:

  • NASA/Goddard Space Flight Center SAIC
  • Hydrological Sciences Branch
  • NASA-GSFC Mail Code 974.1
  • Building 22, Room 014

City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@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: 1 952 361 6610 x252
Fax: 1 952 361 6634
Email: cline@nohrsc.nws.gov
Contact Address:

  • NOHRSC
  • National Weather Service
  • National Operational Hydrologic Remote Sensing Center
  • 1735 Lake Drive W.

City: Chanhassen
Province or State: MN
Postal Code: 55317

Related URL

VIEW PROJECT HOME PAGE
CLPX Site

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

VIEW PROJECT HOME PAGE
Register as a CLPX user

VIEW PROJECT HOME PAGE
Snow Water Equivalent Field Measurements

VIEW PROJECT HOME PAGE
Web site for metadata and access to ftp data link.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2003-08-19
Last DIF Revision Date: 2013-06-28

Metadata Views

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

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