CLPX-Ground: ISA Main Meteorological Data
Entry ID: NSIDC-0172

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Summary
Abstract: This data set contains meteorological observations at ten sites throughout the Small Regional Study Area (SRSA) of the Cold Land Processes Field Experiment (CLPX) in Fraser, Colorado, USA. Nine identical meteorological towers were located close to the center of each Intensive Study Area (ISA). Another meteorological tower was located close to the Local-Scale Observation Site (LSOS) within the Fraser Meso-Cell Study Area (MSA). At each site, measurements were made at 10 m above ground level (air temperature, relative humidity, radiation, leaf wetness, wind speed, and direction); approximately 1 m above maximum anticipated snow depth (air temperature, relative humidity, wind speed, wind direction and, in the North Park MSA only, precipitation); and snow depth, snow surface temperature, snow temperature profile, soil moisture, and soil temperatures. Snow pits were also dug at the meteorological sites, and snow density, temperature, and stratigraphy were recorded. Meteorological observations were recorded at a 10-minute temporal resolution between 20 September 2002 and 1 October 2003, although data were not necessarily continuous throughout this time period for all towers. Meteorological measurements were made to support investigations of spatial and temporal variations in accumulation and ablation of the seasonal snowpack within the study areas. 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.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: CLPX Site


Link: VIEW PROJECT HOME PAGE
Description: CLPX Snow Pits


Link: VIEW PROJECT HOME PAGE
Description: Register as a CLPX user


Geographic Coverage
 N: 41.0 S: 39.5  E: -105.0  W: -107.5

Data Set Citation
Dataset Originator/Creator: Elder, K. and A. Goodbody.
Dataset Title: CLPX-Ground: ISA Main Meteorological Data
Dataset Release Date: 2004-02-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Version: 1
Online Resource: http://nsidc.org/data/NSIDC-0172


Temporal Coverage
Start Date: 2002-09-20
Stop Date: 2003-10-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > COLORADO
CONTINENT > NORTH AMERICA
GEOGRAPHIC REGION > NORTHERN HEMISPHERE


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >ATMOSPHERIC PRESSURE MEASUREMENTS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >BOUNDARY LAYER WINDS >AVERAGE WIND DIRECTION    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >BOUNDARY LAYER WINDS >AVERAGE WIND SPEED    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >LONGWAVE RADIATION >LONGWAVE INCOMING RADIATION    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >LONGWAVE RADIATION >LONGWAVE OUTGOING RADIATION    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >BOUNDARY LAYER WINDS >MAXIMUM WIND SPEED    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >BOUNDARY LAYER WINDS >MINIMUM WIND SPEED    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >NET RADIATION    [Definition]
ATMOSPHERE >PRECIPITATION >PRECIPITATION AMOUNT    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY >RELATIVE HUMIDITY    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >SHORTWAVE RADIATION >SHORTWAVE INCOMING RADIATION    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >SHORTWAVE RADIATION >SHORTWAVE OUTGOING RADIATION    [Definition]
LAND SURFACE >LAND TEMPERATURE >SKIN TEMPERATURE    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW DENSITY    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW DENSITY    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW DEPTH    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW/ICE CHEMISTRY    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW/ICE CHEMISTRY    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW/ICE TEMPERATURE    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW/ICE TEMPERATURE    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW STRATIGRAPHY    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW STRATIGRAPHY    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW COVER >SNOW TEMPERATURE    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW WATER EQUIVALENT    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW WATER EQUIVALENT    [Definition]
LAND SURFACE >SOILS >SOIL MOISTURE/WATER CONTENT    [Definition]
CRYOSPHERE >FROZEN GROUND >SOIL TEMPERATURE    [Definition]
LAND SURFACE >FROZEN GROUND >SOIL TEMPERATURE    [Definition]
LAND SURFACE >SOILS >SOIL TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >BOUNDARY LAYER WINDS >STANDARD DEVIATION WIND DIRECTION    [Definition]
LAND SURFACE >TOPOGRAPHY >SURFACE ROUGHNESS    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Platform
FIXED OBSERVATION STATIONS    [Information]
GROUND STATIONS    [Information]
GROUND-BASED OBSERVATIONS    [Information]
METEOROLOGICAL STATIONS    [Information]


Instrument
HUMIDITY SENSORS    [Information]
INFRARED THERMOMETERS    [Information]
NET RADIOMETERS    [Information]
PRESSURE SENSORS
Radiometers    [Information]
RAIN GAUGES    [Information]
SOIL MOISTURE PROBE    [Information]
TEMPERATURE LOGGERS    [Information]
TEMPERATURE PROBES    [Information]
THERMOCOUPLES    [Information]
ULTRASONIC DEPTH GAUGE    [Information]
WIND VANES    [Information]


Project
CLPX >Cold Land Processes Field Experiment    [Information]
ESIP >Earth Science Information Partners Program    [Information]
EOSDIS >Earth Observing System Data Information System    [Information]


Quality
The available data product has been processed to a Level 1 standard. This means that raw data (Level 0 data), which was downloaded on approximately a monthly basis, haveeen concatenated into one continuous file per meteorological tower. Data have then been filtered twice for faulty values. The first filtering process was done manually in order to recognize instrument, wiring, or programming problems. The second filtering process was done computationally to remove blank values or any faulty values that fall outside of acceptable boundaries for each instrument. Faulty data and missing data were replaced with a default value of 8999. Data that were considered suspect during manual filtering were left in Level 1 files even after they were identified as suspect. This was done when technicians recognized potential inconsistencies but were either unsure of the cause or were unable to verify their assumptions. Rather than alter the dataset without definitive proof of faulty data, data were left for further interpretation and quality control by future investigators. Although we have a high level of confidence in the products that are delivered in this dataset, future investigators should implement their own quality control procedures. A qualitative assessment of potentially faulty data is provided.


Keywords
Air Temperatures
Atmospheric Pressure
Incoming Radiation
Incoming Shortwave Radiation
Land Surface Temperature
Longwave Downward Radiation
Longwave Radiation
Near-surface Air Temperatures
Net Radiation
Precipitation
Precipitation Amount
Relative Humidity
Shortwave Radiation
Snow Depth
Snow Surface Temperature
Snow Temperature
Soil Moisture
Soil Temperatures
Surface Soil Moisture
Surface Temperature
Surface Winds
Ten Meter Temperatures
Two-Meter Air Temperature
Wind Direction
Wind Speed
Wind Velocity


Data Set Progress
IN WORK


Data Center
NSIDC Distributed Active Archive Center    [Information]
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 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


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: 345 MB
Distribution_Format: ASCII Text (.txt)


Personnel
KELLY ELDER
Role: INVESTIGATOR
Phone: 970 498 1233
Fax: 970 498 1212
Email: kelder at fs.fed.us
Contact Address:
USFS RMRS
Rocky Mountain Research Station
USDA Forest Service
240 West Prospect Road
City: Fort Collins
Province or State: CO
Postal Code: 80526


ANGUS GOODBODY
Role: INVESTIGATOR
Phone: 970 498 1273
Fax: 970 498 1212
Email: goodbody at lamar.colostate.edu
Contact Address:
USFS Rocky Mountain Research Station
USDA Forest Service
240 West Prospect Rd
City: Fort Collins
Province or State: CO
Postal Code: 80526
Country: USA


NICK RUTTER
Role: INVESTIGATOR
Phone: 952 361 6610 x230
Fax: 952 361 6634
Email: nrutter at nohrsc.nws.gov
Contact Address:
1735 Lake Drive West
City: Chanhassen
Province or State: MN
Postal Code: 55317
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



Creation and Review Dates
DIF Creation Date: 2004-02-01
Last DIF Revision Date: 2014-07-07

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