Evaluation of a Cavity Ring-Down Spectrometer for In-Situ Observations of 13CO2
With the emergence of wide-spread application of cavity ring-down spectrometers (CRDS) to monitor δ13C in atmospheric CO2 there is a growing need to ensure well calibrated measurements. We characterized a cavity ring-down spectrometer system used for continuous in-situ monitoring of atmospheric 13CO2. We found no concentration dependency of the δ13C ratio within the range of 303–437 ppm.