Fig. 2: Links between aerosols, turbulence and planetary boundary layer (PBL) height.

a–c These show scatterplots between the monthly mean change in turbulence and the change in PBL height for the three different drivers (carbon dioxide—CO2; black carbon—BC; sulfate—SO4), where grid cells with large BC changes are colored in darker reds (note that for the BCx10 experiments, BC values are divided by ten). Land grid cells only, all correlation coefficients are statistically significant at the 0.01 level. d This shows wintertime (November through February) difference in PDFs of afternoon (15.00 local time) Richardson number Ri at 912 hPa for all grid cells within the East China region. e Distribution of hourly values of near-surface BC concentration based on all grid cells within the East China region.