Regional Hydroclimate Project:
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CPPA (Climate Prediction Program for the Americas; formerly GAPP)
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SGP (Southern Great Plains)
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E15 (Extended Facility 15, Ringwood, OK)
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Name:Steve Williams
Affiliation:
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NCAR/EOL
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3450 Mitchell Lane
Boulder, CO 80301
Telephone: (303) 497-8164
Fax: (303) 497-8770
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Latitude: 36.43100 N
Longitude: 98.28400 W
Elevation: 418 m
ARM SGP Overview Map (click for full resolution):
ARM SGP E15 Area Map (click for full resolution):
Google Earth .kmz file of CPPA SGP Reference Site station and radiosonde locations
Station Description:
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General Description:
Sandy site, in a relatively uniform area that appears to be grass-covered sand dunes, with tree lines several hundred meters to the north, west, and south. Site appears to have never been plowed (no landowner confirmation). Soil from the deepest two levels (125 cm and 175 cm) was different in texture, with some clay content. Vegetation is knee deep and covers the ground more completely than at the other two sandy sites; roots were visible through the depth of the access pits. Micrometeorological data will be representative of the area.
Station Operator:
DOE ARM
Vegetation and Land Use:
Dominanat land cover at the measurement location: pasture
Canopy height: No information
Land cover (approximate percentages of each type) within 50 m of the measurement location: no information
Land cover (approximate percentages of each type) within 500 m of the measurement location (1 km pixel): no information
Land cover (approximate percentages of each type) within 12 km of the measurement location (1/4 degree pixel): no information
Seasonal land cover changes: no information
Major changes in land cover at the site during the CEOP data collection period: No information
Slope at the site: no information
Mean elevation and range of elevations in 1 km pixel: No information
Soil Type and Characterization:
Surface Soil Type: Sand (6 cm) - 93.46% sand; 2.96% silt; 3.58% clay; 0% gravel
Deeper Layers Soil Type:
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Sand (21 cm) - 92.03% sand; 1.82% silt; 6.15% clay; 0% gravel
Sand (39 cm) - 92.25% sand; 2.00% silt; 5.75% clay; 0% gravel
Sand (50 cm) - 92.05% sand; 2.00% silt; 5.95% clay; 0% gravel
Surface Soil porosity: no information
Deeper Layers Soil Porosity: no information
Soil infiltration rate: no information
Bulk dry density:
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6-13 cm - 1.55 g/cm3
19-27 cm - 1.51 g/cm3
39-46 cm - 1.59 g/cm3
45-52 cm - 1.51 g/cm3
Saturated hydraulic conductivity: no information
Soil Reference Group(s) (from World Reference Base for Soil Resources): no information
Climate:
No information
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SURFACE METEOROLOGY AND RADIATION INSTRUMENTATION AND DESCRIPTION:
- Station pressure 1m; Vaisala Model PTB201A
- Air Temperature 2m; Campbell Scientific Model HMP35C
- Dew point 2m; derived
- Relative humidity 2m; Campbell Scientific Model HMP35C
- Specific humidity 2m; derived
- Wind speed 10m; R. M. Young Model 05103
- Wind direction 10m; R. M. Young Model 05103
- U wind component 10; derived
- V wind component 10; derived
- Precipitation height unspecified; Electrically heated, tipping bucket precipitation gauge, Novalynx Model 260-2500E-12
- Snow depth Not measured.
- Incoming shortwave radiation height unspecified; Precision Spectral Pyranometer
- Outgoing shortwave radiation height unspecified; Precision Spectral Pyranometer
- Incoming longwave radiation height unspecified; Precision Infrared Radiometer
- Outgoing longwave radiation height unspecified; Precision Infrared Radiometer
- Net radiation height unspecified; derived
- Skin temperature not measured
- Incoming Photosynthetically Active Radiation (PAR) not measured
- Outgoing Photosynthetically Active Radiation (PAR) not measured
- Sensible Heat Flux height unspecified; Vaisala Inc., Model #s HMP 35A and HMP 35D at two heights
- Latent Heat Flux height unspecified; Vaisala Inc., Model #s HMP 35A and HMP 35D at two heights
- CO2 Flux not measured
- Soil Heat Flux -0.05 m height; Soil Heat Flow Probes, Radiation & Energy Balance Systems, Inc., Model #s HFT-3, HFT3.1
- Soil Temperature -0.05, -0.15, -0.25, -0.35, -0.60, -0.85, -1.25, and -1.75m heights; Model 229L Matric Potential Sensor, Campbell Scientific, Inc.
- Soil Moisture -0.05, -0.15, -0.25, -0.35, -0.60, -0.85, -1.25, and -1.75m heights; Model 229L Matric Potential Sensor, Campbell Scientific, Inc.
Further information available on soil data here.
Further information available on surface meteorological data here and here and on radiation data here.
METEOROLOGICAL TOWER INSTRUMENTATION AND DESCRIPTION:
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No data of this type at this station.
FLUX INSTRUMENTATION AND DESCRIPTION:
Further information available on flux data here.
SOIL INSTRUMENTATION AND DESCRIPTION:
RADIOSONDE INSTRUMENTATION AND DESCRIPTION:
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No data of this type at this station.
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Web:
Literature:
- CPPA (13 March 2007; Washington , DC, USA)
- GAPP (10 March 2004; Irvine, Calif ornia, USA)
- GAPP (31 March 2003; Berlin, Germany)
- GAPP (6 March 2002; Tokyo, Japan)
- EOP-3/4 and beyond Data Sets and Documentation
- Surface Meteorological Data: Current Status and Browse Plots
- Soil Temperature and Moisture Data: Current Status and Browse Plots
- Flux Data: Current Status and Browse Plots
- Meteorological Tower Data: Current Status and Browse Plots
- EOP-1 Converted Format Data Sets and Documentation
- EOP-1 Native Format Data Sets and Documentation