Articles | Volume 18, issue 11
Atmos. Chem. Phys., 18, 7781–7798, 2018
https://doi.org/10.5194/acp-18-7781-2018
Atmos. Chem. Phys., 18, 7781–7798, 2018
https://doi.org/10.5194/acp-18-7781-2018

Research article 04 Jun 2018

Research article | 04 Jun 2018

Secondary aerosol formation promotes water uptake by organic-rich wildfire haze particles in equatorial Asia

Jing Chen et al.

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Cited articles

Aan de Brugh, J. M. J., Henzing, J. S., Schaap, M., Morgan, W. T., van Heerwaarden, C. C., Weijers, E. P., Coe, H., and Krol, M. C.: Modelling the partitioning of ammonium nitrate in the convective boundary layer, Atmos. Chem. Phys., 12, 3005–3023, https://doi.org/10.5194/acp-12-3005-2012, 2012. 
Balasubramanian, R., Qian, W.-B., Decesari, S., Facchini, M. C., and Fuzzi, S.: Comprehensive characterization of PM2.5 aerosols in Singapore, J. Geophys. Res.-Atmos., 108, 4523, https://doi.org/10.1029/2002JD002517, 2003. 
Bond, T. C. and Bergstrom, R. W.: Light absorption by carbonaceous particles: An investigative review, Aerosol Sci. Tech., 40, 27–67, 2006. 
Bougiatioti, A., Bezantakos, S., Stavroulas, I., Kalivitis, N., Kokkalis, P., Biskos, G., Mihalopoulos, N., Papayannis, A., and Nenes, A.: Biomass-burning impact on CCN number, hygroscopicity and cloud formation during summertime in the eastern Mediterranean, Atmos. Chem. Phys., 16, 7389–7409, https://doi.org/10.5194/acp-16-7389-2016, 2016. 
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Short summary
We present water uptake properties of haze particles originating from Indonesian peatland fires and further link the water uptake to particle chemical characteristics. Organic-rich wildfire haze particles are highly hygroscopic, governed by sulfate and promoted by secondary organic aerosol formation. Water-soluble organic fraction plays a minor role in determining particle hygroscopicity. This deepens our understanding, and reported results can be further applied into climate models.
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