Cold Land Processes Data at NSIDC

Cold Land Processes Experiment (CLPX) Data

Cold Land Processes Field Experiment (CLPX)

The NASA Cold Land Processes Field Experiment (CLPX) was a multi-sensor, multi-scale field program of nested study areas in Colorado and Wyoming, USA, designed to extend the current local-scale understanding of water fluxes, storage, and transformations to regional and global scales. Using ground, airborne, and spaceborne observations, the experiment emphasized the development of a strong synergism between process-oriented understanding, land surface models, and microwave remote sensing. Data were collected during 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. For more information on CLPX, please see the CLPX Introduction.

CLPX data and documentation

Register as a CLPX data user (to get data set updates and information about upcoming CLP programs and field experiments).

Cold Land Processes
Field Study Area

For more information on the Study Area, please visit the CLP Experiment Plan.

See also:
CLPX Snow Pit Data
AMSR-E Validation Projects

CLPX Data and Documentation Table

Data Set / Product	Spatial Coverage	IOP1	IOP2	IOP3	IOP4	Data Volume	Parameters
Satellite Data
SSM/I Brightness Temperature Grids	All LRSA	X	X	X	X	4.07 MB	Microwave brightness temperature
AMSR-E Brightness Temperature Grids	All LRSA			X	X	2.76 MB	Microwave brightness temperatures
Radarsat Synthetic Aperture Radar Imagery (access restricted to registered users)	Swaths intersect each MSA			X	X	400 MB	Synthetic aperture radar imagery
SeaWinds on QuikSCAT Scatterometer Data (Data not received. Responsible Investigator: Kyle McDonald, JPL)	All LRSA	X	X	X	X	50 MB	Radar backscatter
EO-1 Hyperion Surface Reflectance, Snow-Covered Area, and Grain Size	Swath intersects Fraser MSA	X	X			724 MB	Apparent surface reflectance Subpixel snow-covered area Grain size
Landsat Thematic Mapper Imagery	Two swaths each intersecting sections of each MSA	25 scenes collected during cloud sparse periods between July 2001 and March 2003				12 GB	Level 1 (radiance) radiometrically and geometrically corrected Landsat TM imagery
Multi-angle Imaging Spectroradiometer (MISR) Products	All LRSA	X	X	X	X	6.5 GB	Level 1B1 radiance (all angles) Level 1B2 georectified terrain Level 2 land surface Ancillary geographic product
MODIS Radiances, Reflectances, Snow Cover and Related Grids	All LRSA	X	X	X	X	45 GB	Calibrated radiances Surface reflectance Snow cover Land surface temperature and emissivity Vegetation indices Cloud mask
AVHRR/HRPT Brightness Temperatures and Reflectances	All LRSA	44 scenes collected between November 2001 and June 2003				188.64 MB	Calibrated reflectance Brightness temperature
Airborne Data
Airborne Synthetic Aperture Radar (AIRSAR) Imagery	Each MSA	X	X		X	POLSAR 300 MB, TOPSAR 1 GB per flight line; 92.61 GB total	Polarimetric (POLSAR) and cross-track interferometry (TOPSAR) radar data at P, L, and C bands
Airborne Visible/Infrared Imaging Spectrometer (AVIRIS)	Swaths intersect ISA		X¹	X	X	22.52 GB	Apparent surface reflectance Subpixel snow-covered area Grain size
Multiband Polarimetric Scanning Radiometer (PSR) Imagery	Each MSA	X		X	X	2.4 GB	Brightness temperature Snow cover
Airborne GPS Bistatic Radar²	Each MSA	X		X	X	280 MB	Snow cover Soil moisture
Infrared Orthophotography and LIDAR Topographic Mapping	Each ISA				X³	4.31 GB	Terrain elevation Snow depth
Airborne Gamma Snow and Soil Moisture Surveys	Each MSA	X⁴		X⁵	X	1 MB	Snow water equivalent (SWE) Soil moisture
Polarimetric Ku-Band Scatterometer (POLSCAT) Data	Each MSA	X		X	X	2.94 MB	Snow water equivalent
Micrometeorological Measurements Over Snow, Airborne	North Park MSA			X	X	2 GB	3-D winds Fast response temperatures Fast response water vapor mixing

Ground Data
Ground-Based Infrared Images of the LSOS Site	Within LSOS	X	X		X	38 MB	Digital thermograms Meteorological parameters
Micrometeorologica Measurements Over Snow, Tower Mounted²	Adjacent to Potter Creek ISA	X	X	X		55 GB high-rate data	Micrometeorological parameters
Micrometeorological Measurements Over Snow, Ground-Based²	Potter Creek ISA	X	X	X		25 GB	Micrometeorological parameters
Ground-Based Frequency Modulated Continuous Wave (FMCW) Radar²	LSOS and in each MSA	X	X	X	X	80 MB	Snow reflectivity
Ground Based Passive Microwave Radiometer (GBMR-7) Data	Within LSOS			X⁶	X	8.05 MB	Brightness temperature Radiation Snow cover, depth, and stratigraphy Snow water equivalent Soil moisture
Ground-Based L and Ku Band Polarimetric Scatterometry	Within LSOS			X	X	3.69 MB	Fully polarimetric backscattering coefficients of snow Snow cover Snow depth
University of Michigan Ground-Based Microwave Radiometer	Within LSOS				X	561 KB	Brightness temperature Upwelling brightness from trees Downwelling brightness from trees
Micrometeorological Data at the Local Scale Observation Site (LSOS)	Within LSOS			X	X	4.51 MB	Soil temperature Soil moisture Soil heat budget Snow/air temperatures
Snow Measurements at the Local Scale Observation Site (LSOS)	Within LSOS	X	X	X	X	113 KB, plus large photos	Snow depth Snow water equivalent Snow density Snow wetness
Sub-Canopy Energetics at the Local Scale Observation Site (LSOS)	Within LSOS	X	X	X	X	1.36 MB, plus large photos	Canopy characteristics Incoming radiation Snow depth Snow temperature Soil temperature and heat flux Meteorological parameters
ISA Main Meteorological Data	Within each ISA and adjacent to LSOS			X	X	85.39 MB, plus large photos	Meteorological parameters
ISA Corner Site Meteorological Data	Within each ISA			X	X	1 GB, plus photos	Air temperature Relative humidity Snow depth Soil moisture Soil temperature Wind speed Wind direction
ISA Snow Depth Transects and Related Measurements	Within each ISA	X	X	X	X	414 KB, plus large photos; 4.42 GB total	Snow cover Snow depth Soil temperature Surface roughness Canopy characteristics
ISA Snow Pit Measurements Browse snow pits	Within each ISA	X	X	X	X	805 KB, plus large photos; 2.19 GB total	Snow density Snow temperature Snow stratigraphy Snow grain size Snow water equivalent
Vegetation Biophysical Activity at LSOS (Data not received. Responsible Investigator: Kyle McDonald, JPL)	Within LSOS	X	X	X	X	4 MB	Thermograms of vegetation
ISA Soil Moisture Measurements	Within each ISA and the North Park MSA	X	X	X	X	1 MB	Gravimetric soil moisture

Model Data
Local Analysis and Prediction System (LAPS): 4-D Atmospheric Analyses	All LRSA	X	X	X	X	148.3 GB	2-D surface meteorology 3-D upper-air meteorology
NCAR Data Analysis and Numerical Modeling	All LRSA	X	X	X	X	322 GB	3-D meteorological analysis
NOAA FSL Rapid Update Cycle 20 km (RUC-20) Dataset	All LRSA			X	X	600 GB	Short-range numerical meteorological parameters
Rapid Update Cycle 40km (RUC-40) Model Output Reduced Data Set	All LRSA			X	X	71.44 MB	Meteorological forecasting parameters
Land Data Assimilation System (LDAS) Data	All LRSA	X	X	X	X	6.75 GB	43 model and observation-based meteorological parameters

Table notes:

¹ Scenes collected shortly after IOP2.
² Data sets related to CLPX, but not directly part of the experiment. Data are advertised and described by NSIDC but archived elsewhere.
³ Data collected shortly after IOP4 and in September 2004
⁴ Background data collected prior to these flight lines in September 2001
⁵ Background data collected prior to these flight lines in September 2002
⁶ Data also collected prior to IOP3 in December 2002

Acronyms

ISA = Intensive Study Area
LRSA = Large Regional Study Area
LSOS = Local Scale Observation Site
MSA = Meso-cell Study Area
IOP = Intensive Observation Period

IOP1 - February 2002
IOP2 - March 2002
IOP3 - February 2003
IOP4 - March 2003

Cold Land Processes Experiment (CLPX) Data

Cold Land Processes Field Experiment (CLPX)

Cold Land Processes Field Study Area

For more information on the Study Area, please visit the CLP Experiment Plan.

CLPX Data and Documentation Table

Data Set / Product

Spatial Coverage

IOP1

IOP2

IOP3

IOP4

Data Volume

Parameters

Acronyms

Cold Land Processes
Field Study Area