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Data from: Acidification of aerosols in the last 200 years revealed from an Asia ice core

Citation

Li, Zhengjie et al. (2022), Data from: Acidification of aerosols in the last 200 years revealed from an Asia ice core, Dryad, Dataset, https://doi.org/10.5061/dryad.m63xsj45k

Abstract

Aerosol acidity has broad significance in the atmosphere and ecosystems; however, a reliable way to quantify its changes over long time is lacking. Here, we propose a new approach calculating aerosol pH based on the nitrogen stable isotope composition (δ15N) of aerosol ammonium (NH4+) and for the first time reconstruct historical trajectory of aerosol pH over the last two centuries via δ15N of NH4+ achieved in a Tibetan ice core. We observed a significant decrease in δ15N of ice core NH4+ by 13‰ from the preindustrial to modern era, corresponding to a decreased in aerosol pH by 0.75 units. The decline in pH demonstrates a dominant role of anthropogenic emissions in acid gases over alkaline gases since Industrial Revolution. Our study also suggests that spatiotemporal patterns of aerosol acidity could be widely revealed by future nitrogen stable isotope of aerosol ammonium measurement, which in turn promotes the understanding in aerosol chemistry in the context of global environmental changes.

Funding

National Key Research and Development Program of China, Award: 2017YFC0212700

National Key Research and Development Program of China, Award: 2016YFA0600802

National Science Foundation, Award: AGS-1351932

National Science Foundation, Award: AGS-1624618

Chinese Academy of Sciences, Award: QYZDB-SSWDQC002

National Natural Science Foundation of China, Award: 41530748

National Natural Science Foundation of China, Award: 41773094

Hunan Natural Science Foundation-Youth Science, Award: 2021JJ41071

China Scholarship Council, Award: 201704910659