Extended Data Fig. 1: Observed particle size distributions of NO3−, NH4+, and SO42− aerosols under different air pollution conditions in China.
From: Underestimation of particulate dry nitrogen deposition in China
The blue curves, ranging from light to dark, represent simulated results with pollution levels increasing from low to high, corresponding to the left y-axis. Similarly, the red curves, ranging from light to dark, depict observed results with increasing pollution levels from low to high, corresponding to the right y-axis. ‘SIM’ means simulations. ‘OBS’ means observations. ‘N’ means normal days. ‘LP’ means lightly polluted days. ‘HP’ means heavily polluted days. Daily air quality levels were classified based on average daily PM2.5 values. Some cities did not have heavily polluted days during the simulation period, resulting in the absence of some locations in SIM_HP figures. The observations here are obtained from previous publications102,103.
