Tropospheric Chemistry: Instruments

Integrated-Cavity-Output Spectrometer (ICOS)

Principle of the Measurement

infrared laser off-axis integrated-cavity-output spectroscopy

Species Measured

N₂O, CO, H₂O

Time Response

1 Hz

Manufacturer

Los Gatos Research Inc. (modified)

Field Projects / Platforms

• FRAPPE/DISCOVER-AQ 2014 (CSL Mobile Laboratory)
• Ag Emissions Studies 2014-2015 (CSL Mobile Laboratory)
• Aliso Canyon Study (CSL Mobile Laboratory)
• FIREX-AQ 2019 (NASA DC-8)
• COVID-AQS 2020 (ground site)
• VERNNAL 2025 (ground site)

Key Publications

Coggon, M.M., P.R. Veres, B. Yuan, A. Koss, C. Warneke, J.B. Gilman, B. Lerner, J. Peischl, K. Aikin, C. Stockwell, L. Hatch, T.B. Ryerson, J.M. Roberts, R. Yokelson, and J. de Gouw, Emissions of nitrogen-containing organic compounds from the burning of herbaceous and arboraceous biomass: fuel composition dependence and the variability of commonly used nitrile tracers, Geophys. Res. Lett., doi:10.1002/2016GL070562, 2016.

Eilerman, S.J., J. Peischl, J.A. Neuman, T.B. Ryerson, K.C. Aikin, M.W. Holloway, M.A. Zondlo, L.M. Golston, D. Pan, C. Floerchinger, and S. Herndon, Characterization of ammonia, methane, and nitrous oxide emissions from concentrated animal feeding operations in northeastern Colorado, Environmental Science & Technology, doi:10.1021/acs.est.6b02851, 2016.