sp2: Single Particle Soot Photometer

The single-particle soot photometer (SP2) measures the soot (black carbon) mass of individual aerosol particles by laser-induced incandescence down to concentrations as low as ng/m^3.

The SP2 is part of the aerosol observing system (AOS).



  • Fixed
  • AMF1
  • AMF2
  • AMF3

Related Publications


Shou C, N Riemer, T Onasch, A Sedlacek, A Lambe, E Lewis, P Davidovits, and M West. 2019. "Mixing state evolution of agglomerating particles in an aerosol chamber: Comparison of measurements and particle-resolved simulations." Aerosol Science and Technology, , 10.1080/02786826.2019.1661959.

de Sá S, L Rizzo, B Palm, P Campuzano-Jost, D Day, L Yee, R Wernis, G Isaacman-VanWertz, J Brito, S Carbone, Y Liu, A Sedlacek, S Springston, A Goldstein, H Barbosa, M Alexander, P Artaxo, J Jimenez, and S Martin. 2019. "Contributions of biomass-burning, urban, and biogenic emissions to the concentrations and light-absorbing properties of particulate matter in central Amazonia during the dry season." Atmospheric Chemistry and Physics, 19(12), 10.5194/acp-19-7973-2019.

Wang J, R Wood, M Jensen, E Azevedo, C Bretherton, D Chand, C Chiu, X Dong, J Fast, A Gettelman, S Ghan, S Giangrande, M Gilles, A Jefferson, P Kollias, C Kuang, A Laskin, E Lewis, X Liu, Y Liu, E Luke, A McComiskey, F Mei, M Miller, A Sedlacek, and R Shaw. 2019. Aerosol and Cloud Experiments in Eastern North Atlantic (ACE-ENA) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-19-012.

Riemer N, A Ault, M West, R Craig, and J Curtis. 2019. "Aerosol Mixing State: Measurements, Modeling, and Impacts." Reviews of Geophysics, 57, 10.1029/2018RG000615.
Research Highlight

Ahern A, E Robinson, D Tkacik, R Saleh, L Hatch, K Barsanti, C Stockwell, R Yokelson, A Presto, A Robinson, R Sullivan, and N Donahue. 2019. "Production of Secondary Organic Aerosol during Aging of Biomass Burning Smoke from Fresh Fuels and its Relationship to VOC Precursors." Journal of Geophysical Research: Atmospheres, 124(6), 10.1029/2018JD029068.


Sedlacek A, T Onasch, L Nichman, E Lewis, P Davidovits, A Freedman, and L Williams. 2018. "Formation of refractory black carbon by SP2-induced charring of organic aerosol." Aerosol Science and Technology, 52(12), doi:10.1080/02786826.2018.1531107.
Research Highlight

Emerson E, J Katich, J Schwarz, G McMeeking, and D Farmer. 2018. "Direct Measurements of Dry and Wet Deposition of Black Carbon Over a Grassland." Journal of Geophysical Research: Atmospheres, 123(21), 10.1029/2018JD028954.

Sedlacek III A, P Buseck, K Adachi, T Onasch, S Springston, and L Kleinman. 2018. "Formation and evolution of tar balls from northwestern US wildfires." Atmospheric Chemistry and Physics, 18(15), 10.5194/acp-18-11289-2018.
Research Highlight

de Sá S, B Palm, P Campuzano-Jost, D Day, W Hu, G Isaacman-VanWertz, L Yee, J Brito, S Carbone, I Ribeiro, G Cirino, Y Liu, R Thalman, A Sedlacek, A Funk, C Schumacher, J Shilling, J Schneider, P Artaxo, A Goldstein, R Souza, J Wang, K McKinney, H Barbosa, M Alexander, J Jimenez, and S Martin. 2018. "Urban influence on the concentration and composition of submicron particulate matter in central Amazonia." Atmospheric Chemistry and Physics, 18(16), 10.5194/acp-18-12185-2018.

Forestieri S, T Helgestad, A Lambe, L Renbaum-Wolff, D Lack, P Massoli, E Cross, M Dubey, C Mazzoleni, J Olfert, A Sedlacek III, A Freedman, P Davidovits, T Onasch, and C Cappa. 2018. "Measurement and modeling of the multiwavelength optical properties of uncoated flame-generated soot." Atmospheric Chemistry and Physics, 18(16), 10.5194/acp-18-12141-2018.

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