Tropospheric Chemistry: Instruments

AFSR (Actinic Flux SprectroRadiometer) decommissioned

AFSR on rooftop in Boulder
AFSR on rooftop of NOAA David Skaggs Research Center in Boulder, Colorado

Principle of the Measurement


Species Measured

Photolysis rates via spectral actinic flux

Time Response

1 Second

Field Projects


Harald Stark

Key Publications

Stark, H., B. M. Lerner, R. Schmitt, R. Jakoubek, E. J. Williams, T. B. Ryerson, D. T. Sueper, D. D. Parrish, and F. C. Fehsenfeld, Atmospheric in situ measurement of nitrate radical (NO3) and other photolysis rates using spectroradiometry and filter radiometry, Journal of Geophysical Research, doi:10.1029/2006JD007578, 2007.