Fig. 2: Absorption enhancement (Eabs) of BC particle coated by different types of SOA.
From: Absorption enhancement and shielding effect of brown organic coating on black carbon aerosols

The Eabs of BC particle coated by SOAclean (A), SOABrC (B), average Eabs of BC particle coated by SOAclean (C) and SOABrC (D). The average Eabs is calculated across three different thicknesses of both PS-CS and R-CS particles. The circles from small to large indicate the thickness of SOA from thin, moderate to thick, respectively.