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Mt Bigelow
Eddy Correlation Tower
 Tower
Height: 30 m
Location:
Coronado National Forest, Santa Catalina Range, Mt Bigelow
Northeast of Tucson, AZ
Site Description:
Fir/Pine second growth subalpine forest
~12m
GPS Coordinate:
Datum WGS84
Latitude: 32° 25' 00" N Longitude: 110° 43' 31.85"
W
Station Elevation:2583
m above sea level
Initial Installation:
15-Apr-02
 Equipment:
Eddy Covariance System:
Gill Windmaster Pro Ultrasonic Anemometer
Li-Cor 7500 Open Path CO2 and H2O Analyzer
Air Temperature and
RH Sensor:
3- Model HMP45C temperature & relative humidity (produced
by Vaisala) Sensor mounted inside an RM Young 12 plate Gill
Radiation Shield.
(4.6 m, 11.1 m, and 25 m)
1- Gill Sonic temperature above canopy
Wind Speed and Direction
Sensors:
3 - Model 3001-L Wind Monitor
1 - Gill Windmaster Pro Ultrasonic Anemometer
(4.6 m, 11.1 m, and 25 m)
Net Radiation Sensors:
1 - Kipp & Zonen 4-Way Radiometer
2 - Kipp & Zonen NR-Lite net radiometer (domeless)
Surface Temperature
Sensor:
1 - Model Precision Infrared Thermometer (produced by Apogee)
mounted at an angle using a movable camera mount.
Canopy Temperature Sensor:
1 - Model Precision Infrared Thermometer (produced by Apogee)
mounted at an anlge using a movable camera mount.
Snow Depth Sensor:
1 - NRCS SNOTEL type snow pillow and pressure transducers
Soil Heat Flux Plates:
2 - REBS soil heat flux plates
TDR Probe Used:
6 - Model CS615 Water Content Reflectometers (Produced by
Campbell Scientific)
Surface/ Soil Thermocouple
Array:
2 - Custom Soil Thermocouple probe (produced by NOAA Lab)
Sensor array has 7 probes. At Surface, 2,4,8,16,32,64 cm b.g.s.
Barometric Pressure:
1 Vaisala PTB101B Barometric Pressure Sensor
Tree Bole & Xylem
Temperature:
6 - 2 Sets of thermocouple in the heartwood and xylem
Dataloggers Used:
1 - CR23X (produced by Campbell Scientific)
S/N: Standard operating range: -25 to +50O.
C housed inside a white fiberglass-reinforced enclosure.
1- 10X (Campbell Scientific).
Data Acquisition, Transmission
/ Storage:
Linux based pc data acquisition system
Telephone line/modem data transfer
10 hertz raw data & 30 min averaged fluxes
Multiplexers Used:
1 - Model AM25T (produced by Campbell Scientific)
25 Channel multiplexer for thermocouple
Power Source:
Currently Solar panels.
Tower Used:
1 - 30 m stairway scaffolding
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