CLPX Airborne Gamma Snow and Soil Moisture Surveys  View Catalog Page 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°
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Data Set Citation
Dataset Creator: Cline, D. and T. Carrol
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: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0158.html
Temporal Coverage
Start Date: 2001-09-20
Stop Date: 2001-09-22
Start Date: 2002-02-19
Stop Date: 2002-02-23
Start Date: 2002-09-17
Stop Date: 2002-09-17
Start Date: 2003-02-19
Stop Date: 2003-02-21
Start Date: 2003-03-25
Stop Date: 2003-03-31
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
- Climatology/Meteorology/Atmosphere
Platform
Instrument
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: ASCII Text
Distribution Media: FTP
Distribution Size: 13.6 MB
Distribution Format: ESRI Shapefiles
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
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: 2012-07-12
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