COLLABORATORS

Lower Tower instrumentation

Valles Caldera Flux tower - Lower Ponderosa Site

Tower Height: 25 m
Location: Valles Caldera National Perserve, New Mexico
Site Description: Ponderosa Pine second growth subalpine forest ~15m
GPS Coordinate: Datum WGS84
Latitude: 35° 51' 53" N Longitude: 106° 35' 46" W
Station Elevation:8200ft above sea level
Initial Installation: Summer 2005

Equipment:

Eddy Covariance System:
Campbell Csat-3 Sonic Anemometer
Li-Cor 7500 Open Path CO2 and H2O Analyzer (24.02m)

Air Temperature and RH Sensor:
2- Model HMP45C Vaisala temperature & relative humidity Sensor Mounted inside an RM Young 12 plate Gill Radiation Shield. (4.95 m, 18.51 m)
1- Csat3 Sonic temperature above canopy

Wind Speed and Direction Sensors:
2 - RM Young Model 3001-L Wind Monitor
1 - Campbell Csat-3 Sonic Anemometer (4.95 m, 18.51 m, and 24.02 m)

Net Radiation Sensors:
1 - Kipp & Zonen CNR1 4-Way Radiometer (18.51m)
1 - Kipp & Zonen NR-Lite net radiometer (domeless) below Canopy (1.5m)

Soil Heat Flux Plates:
2 - REBS soil heat flux plates

TDR Probe Used:
? - Model CS615 Water Content Reflectometers (Produced by Campbell Scientific)

Surface/ Soil Temperture Array:
4 - Campbell Scientific Tcav 107 soil probes (2 and 6cm depths)

Heat Flux plates:
Campbell Scientific HFP01SC heat flux plates at 8cm depth

Barometric Pressure:
1 Vaisala PTB101B Barometric Pressure Sensor
Tree Bole & Xylem Temperature and Sap flow: ?

Dataloggers Used:
1 - CR5000 (produced by Campbell Scientific)

S/N:
Standard operating range: -25 to +50O.
C housed inside a white fiberglass-reinforced enclosure.

Power Source:
Currently 24V Solar panels array with 24V battery bank and regulated 24V to 12V converter

Tower Used:
1 - 25 m transmission tower