The continuous light absorption photometer (CLAP) operates on the same principle as the particle soot absorption photometer (PSAP), i.e., continuously measuring transmission through a filter substrate as sample air is drawn through it. The absorbing aerosol particles are collected in the filter.
The CLAP is part of the aerosol observing system (AOS).
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Jefferson A. 2014. Continuous Light Absorption Photometer (CLAP) Final Campaign Report. U.S. DOE, Office of Science, Office of Biological and Environmental Research. DOE/SC-ARM-14-013.
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