pgs > Precision Carbon Dioxide Mixing Ratio SystemInstrument Type(s) > Baseline

This precision gas system (PGS) makes high-accuracy, high-precision measurements of CO2 mixing ratio (ppmv dry air) in air sampled at 2, 4, 25, and 60 m above the ground.

Specifically, PGS measures atmospheric moisture, CO2 concentration, and methane concentration.


  • Fixed
  • AMF1
  • AMF2
  • AMF3

Active Locations

Facility Name Start Date
Central Facility, Lamont, OK 2001-04-11


Williams IN, WJ Riley, MS Torn, JA Berry, and SC Biraud. 2011. "Using boundary layer equilibrium to reduce uncertainties in transport models and CO(2) flux inversions." Atmospheric Chemistry and Physics, 11(18), 10.5194/acp-11-9631-2011.


Voyles JW. 2009. ACRF Instrumentation Status and Information. DOe ARM Climate Research Facility. DOE/SC-ARM/P-09-004.8. 10.2172/964187.


Voyles JW. 2007. ACRF Instrumentation Status: New, Current, and Future September – October 2007. DOE ARM Climate Research Facility. DOE/SC-ARM/P-07-002.8. 10.2172/948096.


Torn M. 2005. Precision Gas System (PGS) Handbook. U.S. Department of Energy. DOE/SC-ARM/TR-049. 10.2172/1020278.

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