Tropospheric Chemistry: Instruments

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

Manufacturer

Picarro Inc.

Field Projects / Platforms

• CalNex 2010 (NOAA WP-3D)
• SENEX 2013 (NOAA WP-3D)
• FRAPPE/DISCOVER-AQ 2014 (CSL Mobile Laboratory)
• Ag Emissions Studies 2014-2015 (CSL Mobile Laboratory)
• SONGNEX 2015 (NOAA WP-3D)
• Aliso Canyon Study (CSL Mobile Laboratory)
• COVID-AQS 2020 (ground site)
• SUNVEx 2021 (CSL Mobile Laboratory)

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.