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. 2021 Oct 5;55(20):14069–14079. doi: 10.1021/acs.est.1c03875

Figure 2.

Figure 2

(a) Individual ROS concentrations, C, and (b) gross chemical production, P, of individual ROS in the ELF as a function of ambient PM2.5 concentration. The right axis in (b) shows the gross chemical production rate of individual ROS (P′, Table S4). The solid lines represent a standard PM2.5 composition, and the markers represent explicit PM2.5 compositions derived from field data (Tables S5–S7). CO2− and CHO2 in (a) are calculated using acid–base equilibria, as detailed in the Supporting Information, Section S6. In (b), PO2− also includes PHO2. The dotted line in (a) shows the steady-state O3 concentration in the ELF.