3.1. Size distribution of TI and TSI
About 40% of iodine (total and soluble) is contained in the
PM1 aerosol fraction. The content of TI and TSI in the
PM2.5 fine fraction is higher (~60%),
as expected. The latitudinal and longitudinal dependences of the
fraction of TI and TSI in fine aerosol for PM1 and
PM2.5 are plotted in Figures S1 and S2, respectively. No
clear spatial trends can be observed. The latitudinal plot suggests
higher TI content in the fine aerosol towards the north pole.