Extended Data Fig. 4: Relative contribution of POA and SOA types to OA via direct quantification of the FIGAERO-CIMS.
From: Substantial contribution of transported emissions to organic aerosol in Beijing
The concentrations of FIGAERO-CIMS OA types are determined via the direct quantification approach (see methods and Extended Data Fig. 5) and combined with Hydrocarbon-like OA (HOA) and Cooking OA (COA) from the ToF-ACSM. This approach leaves the OA mass fraction that is neither quantified by the ToF-ACSM (HOA + COA) nor directly measured by the FIGAERO-CIMS as unaccounted (winter 29%, COVID lockdown 26%, summer 33%).
