Aerosol concentrations in China have reached unhealthy levels, at least locally. Model simulations suggest that a significant contribution comes from the weakening monsoon circulation in past decades, trapping more pollutants over land.
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Chin, M. Dirtier air from a weaker monsoon. Nature Geosci 5, 449–450 (2012). https://doi.org/10.1038/ngeo1513
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DOI: https://doi.org/10.1038/ngeo1513
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