M.X. ran the E-AIM model for the calculation of the molar concentrations of inorganic ions. J.D. conducted the back-trajectory simulation. X.P., T.W., W.W., A.R.R., and C.G. analyzed the field, laboratory, and modeling results with significant contribution from Q.L., A.M., ...
To investigate the abundance, sources, and impact of Cl2, we measured its concentrations using a chemical ionization mass spectrometer (CIMS) (Methods section “Field measurements”) at a coastal site in Hong Kong (Cape D’Aguilar, 22.21°N, 114.25°E, Supplementary Fig.1), adjacent to the h...