Articles | Volume 3, issue 1
https://doi.org/10.5194/ar-3-1-2025
https://doi.org/10.5194/ar-3-1-2025
Research article
 | 
13 Jan 2025
Research article |  | 13 Jan 2025

Validation of cantilever-enhanced photoacoustic particle-size-resolved light absorption measurement using nigrosin reference particles and Mie modelling

Joel Kuula, Juho Karhu, Tommi Mikkonen, Patrick Grahn, Aki Virkkula, Hilkka Timonen, Tuomas Hieta, and Markku Vainio

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Cited articles

Ajtai, T., Filep, Á., Schnaiter, M., Linke, C., Vragel, M., Bozóki, Z. Á., Szabó, Gá., and Leisner, T.: A novel multii-wavelength photoacoustic spectrometer for the measurement of the UV-vis-NIR spectral absorption coefficient of atmospheric aerosols, J. Aerosol Sci., 41, 1020–1029, https://doi.org/10.1016/j.jaerosci.2010.07.008, 2010. 
Ajtai, T., Hodovány, S., Schnaiter, M., Szabó, G., and Bozóki, Z.: Absorption based size characterisation of aerosol by using photoacoustic spectroscopy, Atmos. Environ., 304, 2–6, https://doi.org/10.1016/j.atmosenv.2023.119772, 2023. 
Arnott, W. P., Moosmüller, H., Rogers, C. F., Jin, T., and Bruch, R.: Photoacoustic spectrometer for measuring light absorption by aerosol: Instrument description, Atmos. Environ., 33, 2845–2852, https://doi.org/10.1016/S1352-2310(98)00361-6, 1999. 
Baldi, A.: Mie_Scattering_and_Absorption_Sphere, GitHub, https://github.com/andrea-baldi/Mie_Scattering_and_Absorption_Sphere/releases/tag/v1.0.2 (last access: 27 May 2024), 2024. 
Bauer, P. S., Spät, D., Eisenhut, M., Gattringer, A., and Weinzierl, B.: Pressure-dependent performance of two CEN-specified condensation particle counters, Atmos. Meas. Tech., 16, 4445–4460, https://doi.org/10.5194/amt-16-4445-2023, 2023. 
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Short summary
We developed a new method to measure how particles absorb light as they change in size, which is critical for understanding their climate impact. Our approach uses a sensitive instrument that measures light absorption directly from particles in real time. By pairing this with a device that sorts particles by size, we achieved accurate size-resolved measurements. Our findings closely match theoretical models, offering a promising tool for future research into how particles influence climate.

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