Abstract We studied the solubility, in real sea water, of iron present in the African dust outbreaks that traverse the Atlantic. Based on measurements of soluble iron (sFe) and aerosol chemistry, we found iron solubilities within the range of 0.4–1.8% in Tenerife, 0.4–3.1% in Barbados and 1.6–12% in Miami. We apportioned the concentrations of sFe between the three sources and processes that we identified: (1) dust, (2) heavy fuel oil combustion emissions, associated with an excess of vanadium and nickel, and (3) atmospheric processing, which is influenced by acidic pollutants. We tracked the propagation of the dust-front of the African dust outbreaks across the Atlantic, which are associated with dust peak events at the impacting sites. During the westward transport across the Atlantic, the contribution to sFe from dust decreased (63%, 42% and 11% in Tenerife, Barbados and Miami, respectively), whereas the contribution due to atmospheric processing increased (26%, 44% and 80% in Tenerife, Barbados and Miami, respectively). In these Saharan-dust outbreaks, the concentrations of sFe due to heavy fuel oil combustion were significantly lower (mostly

中文翻译：

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在撒哈拉沙尘暴爆发中，随着非洲尘埃穿越大西洋，追踪铁溶解度和空气污染物痕迹的变化

摘要 我们研究了横贯大西洋的非洲沙尘暴中存在的铁在真实海水中的溶解度。根据对可溶性铁 (sFe) 和气溶胶化学的测量，我们发现特内里费岛的铁溶解度范围为 0.4-1.8%，巴巴多斯为 0.4-3.1%，迈阿密为 1.6-12%。我们在我们确定的三个来源和过程之间分配了 sFe 的浓度：(1) 灰尘，(2) 重燃料油燃烧排放，与过量的钒和镍有关，以及 (3) 大气处理，这受到以下因素的影响酸性污染物。我们追踪了横跨大西洋的非洲沙尘暴爆发的沙尘锋的传播，这与影响地点的沙尘高峰事件有关。在向西穿越大西洋期间，尘埃对 sFe 的贡献减少（63%，特内里费岛、巴巴多斯和迈阿密分别为 42% 和 11%），而大气处理的贡献增加（特内里费岛、巴巴多斯和迈阿密分别为 26%、44% 和 80%）。在这些撒哈拉沙尘暴爆发中，重油燃烧导致的 sFe 浓度显着降低（主要是