Campbell Scientific offers atmospheric profile systems that measure gas concentration and temperature (optional) at several different intakes, which are typically spaced along the height of a tower to give a vertical concentration profile. These systems are used to calculate the change in storage, which may be combined with eddy-covariance fluxes to give a more complete measure of the surface gas exchange. Profile intakes may also be placed in alternative configurations such as a multi-plot gradient application (i.e., an upper and lower intake pair is placed at each test plot); with a CSAT3B, data from these systems may be used to estimate fluxes using the gradient (i.e., K-theory) method.
The AP200 is a complete, integrated CO2 and H2O atmospheric profile system. It measures carbon dioxide (CO2) and water vapour (H2O) concentration from up to eight intakes, which are normally spaced al...read more
The TGA200A Trace-Gas Analyser measures trace-gas concentrations in an air sample using tunable-diode laser absorption spectroscopy (TDLAS). This technique provides high sensitivity, speed, and select...read more