Extended Data Figure 3: Dissolved nitrate, dissolved Fe concentration and dissolved δ56Fe (relative to IRMM-014) from the surface 200 m of four USGT GA03 North Atlantic stations where heavy δ56Fe from dust deposition is observed.
From: Quantification of dissolved iron sources to the North Atlantic Ocean
The four stations were USGT10-9 (17.4° N 18.3° W), USGT10-10 (17.4° N 20.8° W), USGT11-6 (37.6° N 68.5° W) and USGT11-3 (38.7° N 69.1° W). The blue bar denotes the surface mixed layer and the green the fluorescence maximum at the two eastern stations (the fluorescence maximum is dispersed throughout the mixed layer in the west). A 2σ error is shown for δ56Fe where the value is larger than the point. The grey arrows labelled D represent surface input of Fe from aerosol dust with a δ56Fe of +0.68‰. Nitrate data supplied by Ocean Data Facility.
