Articles | Volume 25, issue 11
https://doi.org/10.5194/acp-25-5469-2025
https://doi.org/10.5194/acp-25-5469-2025
Measurement report
 | 
03 Jun 2025
Measurement report |  | 03 Jun 2025

Measurement report: Characterization of aerosol hygroscopicity over Southeast Asia during the NASA CAMP2Ex campaign

Genevieve Rose Lorenzo, Luke D. Ziemba, Avelino F. Arellano, Mary C. Barth, Ewan C. Crosbie, Joshua P. DiGangi, Glenn S. Diskin, Richard Ferrare, Miguel Ricardo A. Hilario, Michael A. Shook, Simone Tilmes, Jian Wang, Qian Xiao, Jun Zhang, and Armin Sorooshian

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Cited articles

Adam, M. G., Tran, P. T., Bolan, N., and Balasubramanian, R.: Biomass burning-derived airborne particulate matter in Southeast Asia: A critical review, J. Hazard. Mater., 407, 124760, https://doi.org/10.1016/j.jhazmat.2020.124760, 2021. 
Amnuaylojaroen, T.: Air Pollution Modeling in Southeast Asia – An Overview, in: Vegetation Fires and Pollution in Asia, edited by: Vadrevu, K. P., Ohara, T., and Justice, C., Springer, Cham, Switzerland, 531–544, https://doi.org/10.1007/978-3-031-29916-2_31, 2023. 
Anderson, T. L. and Ogren, J. A.: Determining aerosol radiative properties using the TSI 3563 integrating nephelometer, Aerosol Sci. Tech., 29, 57–69, https://doi.org/10.1080/02786829808965551, 1998. 
Ångström, A.: On the atmospheric transmission of sun radiation and on dust in the air, Geografiska Ann., 11, 156–166, https://doi.org/10.1080/20014422.1929.11880498, 1929. 
Attwood, A., Washenfelder, R., Brock, C., Hu, W., Baumann, K., Campuzano-Jost, P., Day, D., Edgerton, E., Murphy, D., and Palm, B.: Trends in sulfate and organic aerosol mass in the Southeast US: Impact on aerosol optical depth and radiative forcing, Geophys. Res. Lett., 41, 7701–7709, https://doi.org/10.1002/2014GL061669, 2014. 
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Short summary
Novel aerosol hygroscopicity analyses of CAMP2Ex (Cloud, Aerosol, and Monsoon Processes Philippines Experiment) field campaign data show low aerosol hygroscopicity values in Southeast Asia. Organic carbon from smoke decreases hygroscopicity to levels more like those in continental than in polluted marine regions. Hygroscopicity changes at cloud level demonstrate how surface particles impact clouds in the region, affecting model representation of aerosol and cloud interactions in similar polluted marine regions with high organic carbon emissions.
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