Tropospheric Chemistry: Instruments

CO2/CH4 instrument installed in aircraft rack

CO2/CH4 instrument installed in aircraft rack

Carbon Dioxide (CO2) and Methane (CH4)

Principle of the Measurement

Wavelength-scanned cavity ring down spectroscopy

Species Measured

CO2 and CH4

Time Response

1 Hz


Picarro, Inc.

Field Projects

  • CalNex 2010
  • SENEX 2013
  • SONGNEX 2015


  • NOAA WP-3D aircraft
  • CIRPAS Twin Otter aircraft
  • Utah ground site
  • BAO ground site
  • CSD mobile lab


Jeff Peischl, Tom Ryerson

Key Publications

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.

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.

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., 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.