A Picarro G2301 trace gas analyser, serial number: CFADS2729, used at Jodrell Bank Observatory. Bef
ore 2024-09-25 a G2301 with serial number CFADS2649 was used, and between 2024-09-25 and 2025-07-14 a G2401 with serial number CFKADS2532 was used. These are all combined into a single "virtual" instrument here. All analysers used cavity ringdown spectrocopy (CRDS) to make in situ measurements of CO2 and CH4 in the near-infrared region - see Crosson et al. (2008) for details of this technique: https://doi.org/10.1007/s00340-008-3135-y.