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.

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

[ Update this Record ]

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 PredictionÂs (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 RELATED INFORMATION
Description: Web site for metadata and access to ftp data link.

Geographic Coverage

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

Data Set Citation

Dataset Originator/Creator: Mr Brian Cosgrove
Dataset Title: CLPX-Model: Land Data Assimilation System (LDAS) Data
Dataset Release Date: 2003-08-19
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: 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
GEOGRAPHIC REGION > NORTHERN HEMISPHERE
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > COLORADO
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WYOMING

ISO Topic Category

BIOTA
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
INLAND WATERS

Platform

Models [Information]

Project

CLPX >Cold Land Processes Field Experiment [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

Snow Melt

Snow Pack Water Equivalent

Snow Water Equivalent

Snowfall

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

Hydrological Sciences Branch, Hydrospheric and Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA [Information]
Data Center URL: http://neptune.gsfc.nasa.gov/hsb/
Dataset ID: NSIDC-0181

Data Center Personnel

Name: BRIAN COSGROVE
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

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
Distribution_Size: appx. 225 MB per month. 6.75 GB total
Distribution_Format: ASCII

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

Publications/References

Xia, Y., K. Mitchell, M. Ek, J. Sheffield, B. Cosgrove, E. Wood, L. Luo, C. Alonge, H. Wei, J. Meng, B. Livneh, D. Lettenmaier, V. Koren, Q. Duan, K. Mo, Y. Fan, and D. Mocko, (2012), Continental-scale water and energy flux analysis and validation for the North American Land Data Assimilation System project phase 2 (NLDAS-2): 1. Intercomparison and application of model products, J. Geophys. Res., 117, D03109, doi:10.1029/2011JD016048.

Koster, R., and M. Suarez (1994), The components of the SVAT scheme and their effects on a GCM's hydrological cycle, Adv. Water Resour., 17, 61-78, doi:10.1016/0309-1708(94)90024-8.

Koster, R., and M. Suarez (1996), Energy and water balance calculations in the Mosaic LSM, NASA Tech. Memo., NASA TM-104606, vol. 9, 60 pp.

Creation and Review Dates

DIF Creation Date: 2009-06-03

Last DIF Revision Date: 2012-11-01

[ Update this Record ]