Impact of acidity and surface-modulated acid dissociation on cloud response to organic aerosol
Gargi Sengupta,
Minjie Zheng,
Nønne L. Prisle
Abstract:Abstract. Acid dissociation of the organic aerosol fraction has the potential to impact cloud-activating properties by altering aqueous-phase H+ concentrations and water activity but is currently overlooked in most atmospheric aerosol models. We implemented a simple representation of organic acid dissociation in the aerosol–chemistry–climate box model ECHAM6.3–HAM2.3 and investigated the impact on aerosol-forming aqueous sulfur chemistry, cloud droplet number concentrations, and the shortwave radiative effect.… Show more
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