Instrument Description

• CO₂ Flux Measurement System (SGP)
  These systems measure wind velocity and direction, temperature, and CO₂ and H₂O densities via an infrared gas analyzer, and then calculate estimates of CO₂ and H₂O fluxes on varying time scales from 0.5 to 4.0 hours.
• Precision Gas System
  This system uses an infrared gas analyzer to take continuous, precise measurements of CO₂ at heights of 2, 4, 25 and 60 m above the ground.
• CO COncetration Measurement System
  This system uses an infrared gas analyzer to collect continuous measurements of atmospheric CO concentration at 60m above the ground.
• Radon-222 Concentration Measurement System
  In November 2006, we started to monitor atmospheric radon-222 concentrations at 60 m above the ground.