Articles | Volume 25, issue 12
https://doi.org/10.5194/acp-25-6407-2025
https://doi.org/10.5194/acp-25-6407-2025
Research article
 | 
27 Jun 2025
Research article |  | 27 Jun 2025

Spectral optical properties of soot: laboratory investigation of propane flame particles and their link to composition

Johannes Heuser, Claudia Di Biagio, Jérôme Yon, Mathieu Cazaunau, Antonin Bergé, Edouard Pangui, Marco Zanatta, Laura Renzi, Angela Marinoni, Satoshi Inomata, Chenjie Yu, Vera Bernardoni, Servanne Chevaillier, Daniel Ferry, Paolo Laj, Michel Maillé, Dario Massabò, Federico Mazzei, Gael Noyalet, Hiroshi Tanimoto, Brice Temime-Roussel, Roberta Vecchi, Virginia Vernocchi, Paola Formenti, Bénédicte Picquet-Varrault, and Jean-François Doussin

Data sets

Mass absorption coefficient: Soot from miniCAST 6204 Type C soot Generator - 19.5:881.7 nm (size) - 450:630 nm (wavelength) (Version 1.0) [Data set] Johannes Heuser et al. https://doi.org/10.25326/ANVB-RN96

Mass scattering coefficient: Soot from miniCAST 6204 Type C soot Generator - 19.5:881.7 nm (size) - 450:630 nm (wavelength) (Version 1.0) [Data set] Johannes Heuser et al. https://doi.org/10.25326/G6VD-PY49

Mass extinction coefficient: Soot from miniCAST 6204 Type C soot Generator - 19.5:881.7 nm (size) - 450:630 nm 900 (wavelength) (Version 1.0) [Data set] Johannes Heuser et al. https://doi.org/10.25326/PZ7X-KZ31

Single scattering albedo: Soot from miniCAST 6204 Type C soot Generator - 19.5:881.7 nm (size) - 450:630 nm (wavelength) (Version 1.0) [Data set] Johannes Heuser et al. https://doi.org/10.25326/KJ5Q-6C88

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Short summary
The spectral optical properties of combustion soot aerosols with varying black (BC) and brown carbon (BrC) content were studied in an atmospheric simulation chamber. Measurements of the mass spectral absorption cross section (MAC), supplemented by literature data, allowed us to establish a generalised exponential relationship between the spectral absorption and the elemental-to-total-carbon ratio (EC / TC) in soot. This relationship can provide a useful tool for modelling the properties of soot.
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