Tropospheric Chemistry: Instruments

NOxCaRD instrument

NOxCaRD instrument.

NOxCaRD (Nitrogen Oxides by Cavity Ring Down)

Principle of the Measurement

diode laser cavity ring down

Species Measured


Time Response

1 second

Detection Limit

100 pptv NO, 20 pptv NO2


custom built

Field Projects

  • ACCRONIM 2009
  • CalNex 2010


Brian Lerner / Eric Williams / Steve Brown

Key Publications

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, 43(20), 7831-7836, doi:10.1021/es902067h, 2009.