Tropospheric Chemistry: Instruments

Carbon Dioxide (CO2) and Methane (CH4)

CO2/CH4 instrument installed in aircraft rack
CO2/CH4 instrument installed in aircraft rack

Principle of the Measurement

Wavelength-scanned cavity ring down spectroscopy

Species Measured

CO2 and CH4

Time Response

1 Hz


Picarro Inc.

Field Projects / Platforms

Key Publications

Peischl, J., S.J. Eilerman, J.A. Neuman, K.C. Aikin, J. de Gouw, J.B. Gilman, S.C. Herndon, R. Nadkarni, M. Trainer, C. Warneke, and T.B. Ryerson, Quantifying methane and ethane emissions to the atmosphere from central and western U.S. oil and natural gas production regions, Journal of Geophysical Research, doi:10.1029/2018JD028622, 2018.

Peischl, J., Ryerson, T. B., Aikin, K. C., deGouw, J. A., Gilman, J. B., Holloway, J. S., Lerner, B. M., Nadkarni, R., Neuman, J. A., Nowak, J. B., Trainer, M., Warneke, C. and Parrish, D. D., Quantifying atmospheric methane emissions from the Haynesville, Fayetteville, and northeastern Marcellus shale gas production regions, J. Geophys. Res., doi:10.1002/2014JD022697, 2015.

Peischl, J., T.B. Ryerson, J. Brioude, K.C. Aikin, A.E. Andrews, E. Atlas, D. Blake, B.C. Daube, J.A. de Gouw, E. Dlugokencky, G.J. Frost, D.R. Gentner, J.B. Gilman, A.H. Goldstein, R.A. Harley, J.S. Holloway, J. Kofler, W.C. Kuster, P.M. Lang, P.C. Novelli, G.W. Santoni, M. Trainer, S.C. Wofsy, and D.D. Parrish, Quantifying sources of methane using light alkanes in the Los Angeles basin, California, J. Geophys. Res., doi:10.1002/jgrd.50413, 2013.

Peischl, J., T.B. Ryerson, J.S. Holloway, M. Trainer, A.E. Andrews, E.L. Atlas, D.R. Blake, B.C. Daube, E.J. Dlugokencky, M.L. Fischer, A.H. Goldstein, A. Guha, T. Karl, J. Kofler, E. Kosciuch, P.K. Misztal, A.E. Perring, I.B. Pollack, G.W. Santoni, J.P. Schwarz, J.R. Spackman, S.C. Wofsy, and D.D. Parrish, Airborne observations of methane emissions from rice cultivation in the Sacramento Valley of California, J. Geophys. Res., doi:10.1029/2012JD017994, 2012.

Perring, A.E., J.P. Schwarz, J.R. Spackman, R. Bahreini, J.A. de Gouw, R.S. Gao, J.S. Holloway, D.A. Lack, J.M. Langridge, J. Peischl, A. Middlebrook, T.B. Ryerson, C. Warneke, L.A. Watts, and D.W. Fahey, Characteristics of black carbon aerosol from a surface oil burn during the Deepwater Horizon oil spill, Geophys. Res. Lett., doi:10.1029/2011GL048356, 2011.