Articles | Volume 14, issue 4
Atmos. Meas. Tech., 14, 3119–3130, 2021
https://doi.org/10.5194/amt-14-3119-2021
Atmos. Meas. Tech., 14, 3119–3130, 2021
https://doi.org/10.5194/amt-14-3119-2021
Research article
28 Apr 2021
Research article | 28 Apr 2021

Performance of an open-path near-infrared measurement system for measurements of CO2 and CH4 during extended field trials

Nicholas M. Deutscher et al.

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This work describes the performance of an open-path measurement system for greenhouse gases in an extended field trial. The instrument obtained measurement repeatability of 0.1 % or better for CO2 and CH4 measurements over a 1.55 km one-way pathway. Comparison to co-located in situ measurements allows characterisation of biases relative to global reference scales. The research was done to show the applicability of the technique and its ability to detect atmospheric-relevant sources and sinks.