Tropospheric Chemistry: Instruments

NOxCaRD (Nitrogen Oxides by Cavity Ring Down)

NOxCaRD instrument
NOxCaRD instrument

Principle of the Measurement

diode laser cavity ring down spectroscopy

Species Measured

NO, NO2, O3, NOy

Time Response / Detection Limit

1 second / 30 pptv

Field Projects

Key Publications

Womack, C. C., Neuman, J. A., Veres, P. R., Eilerman, S. J., Brock, C. A., Decker, Z. C. J., Zarzana, K. J., Dubé, W. P., Wild, R. J., Wooldridge, P. J., Cohen, R. C., and Brown, S. S., Evaluation of the accuracy of thermal dissociation CRDS and LIF techniques for atmospheric measurement of reactive nitrogen species, Atmos. Meas. Tech., doi:10.5194/amt-10-1911-2017, 2017

Wild, R. J., Edwards, P. M., Dubé, W. P., Baumann, K., Edgerton, E. S., Quinn, P. K., Roberts, J. M., Rollins, A. W., Veres, P. R., Warneke, C., Williams, E. J., Yuan, B., and Brown, S. S., A measurement of total reactive nitrogen, NOy, together with NO2, NO, and O3 via Cavity Ring-down Spectroscopy, Environ. Sci. Technol., doi:10.1021/es501896w, 2014.

Fuchs, H., W. P. Dubé, B. M. Lerner, N. L. Wagner, E. J. Williams, and S. S. Brown, A sensitive and versatile detector for atmospheric NO2 and NOx based on blue diode laser cavity ring-down spectroscopy, Environmental Science & Technology, doi:10.1021/es902067h, 2009.