psap-air > Particle soot absorption photometer aboard aircraftInstrument Type(s) > Baseline • Guest

The particle soot absorption photometer collects aerosol particles on a substrate and measures the change in light transmission relative to a reference filter. Bulk particle absorption is derived after correcting for scattering effects. It samples from the Counterflow Virtual Impactor (CVI) and isokinetic inlets.

Primary Derived Measurements


  • Fixed
  • AMF1
  • AMF2
  • AMF3


Nascimento J, M Bela, B Meller, A Banducci, L Rizzo, A Vara-Vela, H Barbosa, H Gomes, S Rafee, M Franco, S Carbone, G Cirino, R Souza, S McKeen, and P Artaxo. 2021. "Aerosols from anthropogenic and biogenic sources and their interactions – modeling aerosol formation, optical properties, and impacts over the central Amazon basin." Atmospheric Chemistry and Physics, 21(9), 10.5194/acp-21-6755-2021.

Brown H, X Liu, R Pokhrel, S Murphy, Z Lu, R Saleh, T Mielonen, H Kokkola, T Bergman, G Myhre, R Skeie, D Watson-Paris, P Stier, B Johnson, N Bellouin, M Schulz, V Vakkari, J Beukes, P van Zyl, S Liu, and D Chand. 2021. "Biomass burning aerosols in most climate models are too absorbing." Nature Communications, 12(1), 10.1038/s41467-020-20482-9.
Research Highlight


Presser C, A Nazarian, D Chand, J Conny, A Sedlacek, and J Hubbe. 2020. "Simultaneous transmission/absorption photometry of particle-laden filters from wildland fires during the Biomass Burning Observation Project (BBOP) field campaign." Journal of Aerosol Science, 150, 10.1016/j.jaerosci.2020.105614.
Research Highlight

Mei F, LA Goldberger, C Flynn, and M Pekour. 2020. Single-Channel Tricolor Absorption Photometer (STAP) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-262.

Mei F, D Dexheimer, J Fast, M Diao, B Geerts, A Bucholtz, L Riihimaki, C Flynn, T Thornberry, T Campos, S Springston, C Kuang, J Tomlinson, and B Schmid. 2020. ARM Aerial Instrument Workshop Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-20-010.

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