OSU Department of Forest Ecosystems and Society  

WALTON CO2 Observation Site

Coordinates: 44.0664N, 123.6292W
Elevation: 715 masl
Intake Heights: 30, 50, and 72 meters above ground
Gases Measured: CO2, CO, H2O

Meteorological instrumentation:
Sensor
Variables
Height
[m a.g.l.]
Vaisala HMP 155A Air Temperature, Relative Humidity
50
RM Young Wind Monitor
Model 05103L
Wind speed, Wind direction
Kipp & Zonen PQS 1 Incoming PAR
Campbell CSAT3 3D wind and sonic temperature
30
Setra Model 278 Air pressure
ground level

The Walton tower is located in the center of the Oregon Coast range, about 44 km West of Eugene, OR and about 4 km northeast of the small town of Walton, OR. The tower is located on a hilltop, with no 
significant sources of anthropogenic emissions in the near field footprint. The mixing ratio time series captured at the Walton tower show significant effects of CO2 release and uptake by the surrounding
Douglas-fir forest, and are intended to provide information on the effect of climate variability on the very active mesic forest ecosystems along the West Coast. Observations at the Walton site were started
in February 2012. The tower is equipped with a PICARRO 2302 measuring CO2/CO/H2O rotating through a vertical profile of 3 inlet heights.

The mixing ratio data measured at this this site is available for download at the NOAA ESRL Observation Package (ObsPack) Data Products webpage.

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Terrestrial Ecosystems Research & Regional Analysis - Pacific Northwest
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