Articles | Volume 18, issue 15
Atmos. Chem. Phys., 18, 11125–11133, 2018
https://doi.org/10.5194/acp-18-11125-2018
Atmos. Chem. Phys., 18, 11125–11133, 2018
https://doi.org/10.5194/acp-18-11125-2018

Technical note 09 Aug 2018

Technical note | 09 Aug 2018

Technical note: Comparison and interconversion of pH based on different standard states for aerosol acidity characterization

Shiguo Jia et al.

Model code and software

E-AIM model S. Clegg, P. Brimblecombe, and A. Wexler http://www.aim.env.uea.ac.uk

ISORROPIA-II model A. Nenes, C. Fountoukis, S. Pandis, and C. Pilinis http://isorropia.eas.gatech.edu

AIOMFAC model A. Zuend, C. Marcolli, B. Luo, and T. Peter http://www.aiomfac.caltech.edu

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Short summary
Aerosol pH are often directly compared across studies while ignoring the inconsistency in standard states. This study attempts to address this issue by comparing aerosol pH with different standard states on the basis of theoretical considerations followed with a set of field data as an example. Application of a pH standardization protocol including a precise statement of thermodynamic model parameters is recommended to avoid biases in cross-comparison.
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