Fig. 2: Drivers for the elevations in PTV10.
From: Co-benefits of reducing PM2.5 and improving visibility by COVID-19 lockdown in Wuhan
a Scatter plots of ambient visibility (VIS) and PM2.5 mass concentrations under different relative humidity (RH) ranges. The curves represent the fitting lines. b Scatter plots of aerosol scattering (bsp) and absorption (bap) coefficients versus PM2.5 mass concentrations. The gray zones represent the 95% confidence intervals. c Relationships between the optical hygroscopicity (f(RH)) of PM2.5 and RH. The upper and lower boundaries of boxes (c) represent the 75th and 25th percentiles, respectively; the lines with the boxes mark the median; the whiskers above and below boxes indicate the maximum and minimum values, respectively; the diamonds along the boxes represent the average values; the dots indicate the potential outliers.
