Articles | Volume 11, issue 5
https://doi.org/10.5194/amt-11-3007-2018
https://doi.org/10.5194/amt-11-3007-2018
Research article
 | 
22 May 2018
Research article |  | 22 May 2018

Use of the Single Particle Soot Photometer (SP2) as a pre-filter for ice nucleation measurements: effect of particle mixing state and determination of SP2 conditions to fully vaporize refractory black carbon

Gregory P. Schill, Paul J. DeMott, Ezra J. T. Levin, and Sonia M. Kreidenweis

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Cited articles

Aiken, A. C., McMeeking, G. R., Levin, E. J. T., Dubey, M. K., DeMott, P. J., and Kreidenweis, S. M.: Quantification of online removal of refractory black carbon using laser-induced incandescence in the single particle soot photometer, Aerosol Sci. Tech., 50, 679–692, https://doi.org/10.1080/02786826.2016.1173647, 2016. 
Averett, R., Leenheer, J., McKnight, D., and Thorn, K.: Humic substances in the Suwannee River, Georgia: Interactions, properties and proposed structures, USGS, Water Supply Paper 2373, 1–224, 1994. 
Broadley, S. L., Murray, B. J., Herbert, R. J., Atkinson, J. D., Dobbie, S., Malkin, T. L., Condliffe, E., and Neve, L.: Immersion mode heterogeneous ice nucleation by an illite rich powder representative of atmospheric mineral dust, Atmos. Chem. Phys., 12, 287–307, https://doi.org/10.5194/acp-12-287-2012, 2012. 
China, S., Mazzoleni, C., Gorkowski, K., Aiken, A. C., and Dubey, M. K.: Morphology and mixing state of individual freshly emitted wildfire carbonaceous particles, Nat. Commun., 4, 2122, https://doi.org/10.1038/ncomms3122, 2013. 
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Short summary
Few techniques can measure the contribution of refractory black carbon (rBC) to ice-nucleating particle (INP) concentrations. One technique uses the single particle soot photometer (SP2) as a pre-filter to an online INP counter to selectively remove rBC particles from an aerosol stream. In this work, we expand upon this technique by determining the effect of the SP2 laser on INP proxies mixed with rBC. We also bounded the SP2 conditions under which rBC is fully vaporized in the SP2 exhaust.