Fig. 2: Simulated organic aerosol (OA) precursors, primary OA (POA), and secondary OA (SOA) trends in China. | Nature Communications

Fig. 2: Simulated organic aerosol (OA) precursors, primary OA (POA), and secondary OA (SOA) trends in China.

From: Widespread 2013-2020 decreases and reduction challenges of organic aerosol in China

Fig. 2

a–c Anthropogenic emissions of OA precursors from different source sectors. Among volatile organic compounds (VOC), only aromatic compounds, glyoxal, methylglyoxal, isoprene, and terpenes are considered as OA precursors. d, e Simulated population-weighted annual mean concentrations of POA and SOA over the action-plan period. f, g Spatial difference of simulated POA and SOA mean concentrations between 2020 and 2013. Source data are provided as a Source Data file. The coastline boundaries in the map are originated from Natural Earth free vector map data (https://www.naturalearthdata.com/). The administration boundaries are originated from the National Earth System Science Data Center(https://www.geodata.cn).

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