Fig. 2: Distribution of black carbon core size and coating amount.
From: Light absorption enhancement of black carbon in a pyrocumulonimbus cloud

Black carbon (BC) mass-weighted distributions of BC core diameter (A) and per-particle RBC (RBC,i) (B) from urban sources, wildfire, and pyroCb smoke. Overall, BC from wildfires have larger core sizes and thicker coatings than urban BC. However, BC in pyroCb clouds are, on average, more thickly coated than BC from wildfires which do not produce a pyroCb cloud. We have included all BC-containing particles detected by the SP2 in (A, B). Whiskers represent 5th and 95th percentiles, boxes show inter-quartile ranges, lines represent median values, and circles show average values.