Articles | Volume 10, issue 9
https://doi.org/10.5194/amt-10-3295-2017
https://doi.org/10.5194/amt-10-3295-2017
Research article
 | 
11 Sep 2017
Research article |  | 11 Sep 2017

Intercomparison of open-path trace gas measurements with two dual-frequency-comb spectrometers

Eleanor M. Waxman, Kevin C. Cossel, Gar-Wing Truong, Fabrizio R. Giorgetta, William C. Swann, Sean Coburn, Robert J. Wright, Gregory B. Rieker, Ian Coddington, and Nathan R. Newbury

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Cited articles

Bui, T. Q., Long, D. A., Cygan, A., Sironneau, V. T., Hogan, D. W., Rupasinghe, P. M., Ciuryło, R., Lisak, D., and Okumura, M.: Observations of Dicke narrowing and speed dependence in air-broadened CO2 lineshapes near 2.06 µm, J. Chem. Phys., 141, 174301, https://doi.org/10.1063/1.4900502, 2014.
Chen, J., Viatte, C., Hedelius, J. K., Jones, T., Franklin, J. E., Parker, H., Gottlieb, E. W., Wennberg, P. O., Dubey, M. K., and Wofsy, S. C.: Differential column measurements using compact solar-tracking spectrometers, Atmos. Chem. Phys., 16, 8479–8498, https://doi.org/10.5194/acp-16-8479-2016, 2016.
Ciais, P., Rayner, P., Chevallier, F., Bousquet, P., Logan, M., Peylin, P., and Ramonet, M.: Atmospheric inversions for estimating CO2 fluxes: methods and perspectives, Climatic Change, 103, 69–92, https://doi.org/10.1007/s10584-010-9909-3, 2010.
Coddington, I., Swann, W. C., and Newbury, N. R.: Coherent multiheterodyne spectroscopy using stabilized optical frequency combs, Phys. Rev. Lett., 100, 013902, https://doi.org/10.1103/PhysRevLett.100.013902, 2008.
Coddington, I., Newbury, N., and Swann, W.: Dual-comb spectroscopy, Optica, 3, 414–426, https://doi.org/10.1364/OPTICA.3.000414, 2016.
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Short summary
In this paper, we compare greenhouse gas measurements from two novel open-path instruments to determine how similarly they measure the same gas concentration. We do this over an outdoor path, so the two instruments measured the same outdoor air. We found that the two instruments agree extremely well, so in the future if the instruments were at two different locations we could reliably compare their measurements to determine differences between the two places.