Tropospheric Chemistry: Instruments

ARNOLD (Atmospheric Ring-down Nitrogen Oxide Laser Detector)

Principle of the Measurement

Diode laser cavity ring down spectroscopy

Species Measured

NO₃, NO₅, NO₂, NO, O₃ (NO_y under development)

Time Response / Detection Limit

1 second / 0.5 pptv NO₃, 1 pptv N₂O₅, 50 pptv NO₂

Field Projects

• NEAQS-ITCT 2004
• Mesa 2005
• TexAQS 2006
• NO3/N2O5 Comp Julich 2007
• Erie 2007
• ICEALOT 2008
• ACCRONIM 2009
• CalNex 2010
• NACHTT 2011
• UBWOS 2012, 2013, 2014
• SENEX 2013
• Hong Kong 2013
• FRAPPE 2014
• WINTER 2015

Key Publications

Wagner, N. L., W. P. Dubé, R. A. Washenfelder, C. J. Young, I. B. Pollack, T. B. Ryerson, and S. S. Brown, Diode laser-based cavity ring-down instrument for NO3, N2O5, NO, NO2 and O3 from aircraft, Atmos. Meas. Tech., doi:10.5194/amt-4-1227-2011, 2011.

Fuchs, H., W. P. Dubé, S. J. Ciciora, and S. S. Brown, Determination of Inlet Transmission and Conversion Efficiencies for in Situ Measurements of the Nocturnal Nitrogen Oxides, NO3, N2O5 and NO2, via Pulsed Cavity Ring-Down Spectroscopy, Anal. Chem., doi:10.1021/ac8007253, 2008.

Dubé, W. P., S. S. Brown, H. D. Osthoff, M. R. Nunley, S. J. Ciciora, M. W. Paris, R. J. McLaughlin, and A. R. Ravishankara, Aircraft instrument for simultaneous, in-situ measurements of NO3 and N2O5 via cavity ring-down spectroscopy, Rev. Sci. Instr., doi:10.1063/1061.2176058, 2006.