Articles | Volume 20, issue 20
Atmos. Chem. Phys., 20, 12223–12245, 2020
https://doi.org/10.5194/acp-20-12223-2020
Atmos. Chem. Phys., 20, 12223–12245, 2020
https://doi.org/10.5194/acp-20-12223-2020

Research article 28 Oct 2020

Research article | 28 Oct 2020

Global modeling of cloud water acidity, precipitation acidity, and acid inputs to ecosystems

Viral Shah et al.

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Cited articles

Aber, J. D., Nadelhoffer, K. J., Steudler, P., and Melillo, J. M.: Nitrogen Saturation in Northern Forest Ecosystems, BioScience, 39, 378–386, https://doi.org/10.2307/1311067, 1989. 
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Alexander, B., Allman, D. J., Amos, H. M., Fairlie, T. D., Dachs, J., Hegg, D. A., and Sletten, R. S.: Isotopic constraints on the formation pathways of sulfate aerosol in the marine boundary layer of the subtropical northeast Atlantic Ocean, J. Geophys. Res.-Atmos., 117, D06304, https://doi.org/10.1029/2011JD016773, 2012. 
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Short summary
Cloud water pH affects atmospheric chemistry, and acid rain damages ecosystems. We use model simulations along with observations to present a global view of cloud water and precipitation pH. Sulfuric acid, nitric acid, and ammonia control the pH in the northern midlatitudes, but carboxylic acids and dust cations are important in the tropics and subtropics. The acid inputs to many nitrogen-saturated ecosystems are high enough to cause acidification, with ammonium as the main acidifying species.
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