Articles | Volume 9, issue 1
Atmos. Meas. Tech., 9, 263–280, 2016
https://doi.org/10.5194/amt-9-263-2016
Atmos. Meas. Tech., 9, 263–280, 2016
https://doi.org/10.5194/amt-9-263-2016

Research article 27 Jan 2016

Research article | 27 Jan 2016

Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy: method development and first intercomparison results

S. Eyer et al.

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Short summary
We present a newly developed field-deployable, autonomous platform simultaneously measuring the three most abundant isotopologues of methane using mid-infrared laser absorption spectroscopy. The instrument consists of a compact quantum cascade laser absorption spectrometer (QCLAS) coupled to a preconcentration unit, called TRace gas EXtractor (TREX). The performance of this new in situ technique was investigated during a 2-week measurement campaign and compared to other techniques.