Fig. 2: Formation mechanisms of Cl2.
From: Enhanced oxidation capacity driven by pollution-induced chlorine chemistry in the coastal atmosphere

a Comparison between observed and simulated Cl2 concentrations; b Production and loss rates of Cl2; c Relationship between the unknown sources of Cl2 and the indicator of nitrate photolysis (NO3−×JNO2×Sa); d Relationship between the unknown sources of Cl2 and the indicator of aerosol iron photochemistry (Fe×JNO2×Sa). Here, Sa signifies aerosol surface area.