Fig. 2 | Nature Communications

Fig. 2

From: Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes

Fig. 2

North Atlantic GA03 aerosol Fe isotope results. Water-soluble and bulk aerosol δ56Fe relative to a Fe concentration43, b Fe solubility44,45,58, or c bulk Pb/Al43. Aerosols from different air masses43 are separated by color: gray Saharan (2010 and 2011), red European (2010), and blue North American (2011). Error bars on δ56Fe are 2σ external error (0.05‰) or 2σ internal error (where larger). The brown vertical bar represents the δ56Fe signature of crustal source materials (0.07–0.14‰)32. Circles denote natural crustal (brown) or anthropogenic-sourced (purple) aerosol fields, based on this study. (Pb/Al)Bulk and the crustal diamond in (c) are based on other sources36,43,48

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