Tropospheric Chemistry: Instruments

RONALD instrument schematic

RONALD instrument schematic

RONALD (Reactive Oxides of Nitrogen)

Principle of the Measurement

diode laser cavity ring down

Species Measured

NO3, N2O5

Time Response / Detection Limit

1 second / <1 pptv

Field Projects

  • CalNex 2010
  • NCAR Chamber 2011-2012
  • UBWOS 2013
  • SOAS 2013
  • University of Colorado Ziemann Chamber 2014
  • University of Colorado Jimenez Chamber 2015


  • ground sites
  • R/V Atlantis


Steve Brown

Key Publications

Fry, J. L., Draper, D. C., Barsanti, K. C., Smith, J. N., Ortega, J., Winkler, P. M., Lawler, M. J., Brown, S. S., Edwards, P. M., Cohen, R. C., and Lee, L., Secondary Organic Aerosol Formation and Organic Nitrate Yield from NO3 Oxidation of Biogenic Hydrocarbons, Environ. Sci. Technol., doi:10.1021/es502204x, 2014.

Fry, J. L., Draper, D. C., Zarzana, K. J., Campuzano-Jost, P., Day, D. A., Jimenez, J. L., Brown, S. S., Cohen, R. C., Kaser, L., Hansel, A., Cappellin, L., Karl, T., Hodzic Roux, A., Turnipseed, A., Cantrell, C., Lefer, B. L., and Grossberg, N., Observations of gas- and aerosol-phase organic nitrates at BEACHON-RoMBAS 2011, Atmos. Chem. Phys., doi:10.5194/acp-13-8585-2013, 2013.

Dubé, W. P., Brown, S. S., Osthoff, H. D., Nunley, M. R., Ciciora, S. J., Paris, M. W., McLaughlin, R. J., and Ravishankara, A. R., Aircraft instrument for simultaneous, in situ measurement of NO3 and N2O5 via pulsed cavity ring-down spectroscopy, Rev. Sci. Instrum., doi:10.1063/1.2176058, 2006.