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CLPX Airborne Gamma Snow and Soil Moisture Surveys

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Entry ID

NSIDC-0158

Summary

Airborne gamma surveys were conducted over each of the three Cold Land Processes Field Experiment (CLPX) Meso-cell Study Areas (MSAs) in northern Colorado, USA, during September 2001 and 2002, and during the three Intensive Observation Periods (IOPs) in February 2002 (IOP1), February 2003 (IOP3) and March 2003 (IOP4). Data collected in September 2001 and 2002 provided background gamma radiation measurements necessary to calculate measurements of snow water equivalent (SWE) and soil moisture during subsequent winters. Airborne gamma radiation measurements of SWE and soil moisture are based on the attenuation of natural terrestrial gamma radiation by the mass of water contained in the soil and snow. Measurements were collected at 500 feet AGL along flight lines of variable length and 300 m width. Measurements are integrated along the entire length of a flight line. Flight lines in the North Park MSA were each 9 km in length, with a series of three lines (27 km total length) flown in a regular N-S parallel pattern spaced 1 km apart. Flight lines in the Fraser and Rabbit Ears MSAs are of variable length and direction.

The NASA 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: 41°     S: 39.5°     E: -105°     W: -107.5°    

Data Set Citation

Dataset Creator: Cline, D. and T. Carroll.
Dataset Title: CLPX Airborne Gamma Snow and Soil Moisture Surveys
Dataset Release Date: 2005-02-04
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0158.html

Temporal Coverage

Start Date: 2003-03-25
Stop Date: 2003-03-31

Start Date: 2003-02-19
Stop Date: 2003-02-21

Start Date: 2002-09-17
Stop Date: 2002-09-17

Start Date: 2002-02-19
Stop Date: 2002-02-23

Start Date: 2001-09-20
Stop Date: 2001-09-22

Location Keywords

  • CONTINENT NORTH AMERICA COLORADO
  • GEOGRAPHIC REGION NORTHERN HEMISPHERE

Science Keywords

  • Cryosphere Snow/Ice Snow Cover
  • Cryosphere Snow/Ice Snow Water Equivalent
  • Land Surface Soils Soil Moisture/Water Content
  • Terrestrial Hydrosphere Snow/Ice Snow Cover
  • Terrestrial Hydrosphere Snow/Ice Snow Water Equivalent

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere

Platform

  • AIRCRAFT

Instrument

  • GAMMA RADIATION DETECTOR

Project

  • CLPX Cold Land Processes Field Experiment

Data Set Progress

complete

Data Center

NASA DAAC at the National Snow and Ice Data Center
Data Center URL: http://nsidc.org/daac/index.html

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
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

National Snow and Ice Data Center
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@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: 13.6 MB
Distribution Format: ESRI Shapefiles (.shp, .shx, .dbf, and .prj)

Distribution Media: FTP
Distribution Size: 13.6 MB
Distribution Format: ASCII Text (.txt)

Personnel

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

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

Tom Carroll
Role: INVESTIGATOR
Contact Address:

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

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

Related URL

VIEW PROJECT HOME PAGE
CLPX Site

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2005-02-04
Last DIF Revision Date: 2013-06-27

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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