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).
| Facility Name | Start Date |
|---|---|
| Barrow, Alaska, new building (NAD83) at NOAA facility | 2020-10-22 |
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Andrews E. 2022. Continuous Light Absorption Photometer (CLAP) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-280. 10.2172/1872557.
Ohata S, T Mori, Y Kondo, S Sharma, A Hyvärinen, E Andrews, P Tunved, E Asmi, J Backman, H Servomaa, D Veber, K Eleftheriadis, S Vratolis, R Krejci, P Zieger, M Koike, Y Kanaya, A Yoshida, N Moteki, Y Zhao, Y Tobo, J Matsushita, and N Oshima. 2021. "Estimates of mass absorption cross sections of black carbon for filter-based absorption photometers in the Arctic." Atmospheric Measurement Techniques, 14(10), 10.5194/amt-14-6723-2021.
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Jensen M, E Bruning, D Collins, A Fridlind, P Kollias, C Kuang, D Rosenfeld, A Ryzhkov, A Varble, SD Brooks, S Collis, E Defer, J Fan, J Flynn, S Giangrande, R Griffin, J Hu, R Jackson, M Kumjian, T Logan, T Matsui, G McFarquhar, C Nowotarski, J Quaas, M Oue, R Sheesley, J Snyder, P Stier, S Usenko, S van den Heever, M van Lier Walqui, Y Wang, Y Xu, and G Zhang. 2019. Tracking Aerosol Convection Interactions ExpeRiment (TRACER) Science Plan. Ed. by Robert Stafford, DOE/SC-ARM-19-017.