Soil abrasion and eolian dust production: Implications for iron partitioning and solubility
Soil abrasion and eolian dust production: Implications for iron partitioning and solubility
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DOI：
10.1029/2006gc001404
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发表时间：
2006-12-29
影响因子：
3.5
通讯作者：
Hunter, K. A.
中科院分区：
文献类型：
--
作者：
Mackie, D. S.;Peat, J. M.;Hunter, K. A.
风成尘是许多海洋地区浮游植物的铁来源，从土壤到海洋的大气处理途径复杂。这些路径中被忽视的部分是大颗粒（>10 μ m）的影响（包括作为较小颗粒行为的替代物的作用）以及尘埃源区多个隆起和磨损周期的影响。分区（容易释放，酸浸出和耐火）和铁的溶解速率进行了测定的人工粉尘（通过磨损澳大利亚土壤），未经处理的土壤，磨损的土壤（生产后的人工粉尘），和一个自然的澳大利亚风成尘样品在沙尘暴。易释放的铁在磨损过程中不会产生，因此粉尘或粉尘衍生的土壤中易释放的铁的量取决于处理事件，因为粉尘或土壤最后经历了磨损事件。我们的研究开发了一种方法，在空气中的尘埃铁的分区，似乎是第一个考虑多个隆起事件对铁分区的影响。
Eolian dust is a source of iron for phytoplankton in many ocean areas, and there are complex pathways of atmospheric processing from soil to ocean. Overlooked parts of the pathways are the impact of large (>10 mu m) grains (including a role as proxies for the behavior of smaller grains) and the effect of multiple cycles of uplift and abrasion in the dust source region. Partitioning (readily released, acid-leachable and refractory) and dissolution rates of iron were determined for an artificial dust (produced by abrading an Australian soil), untreated soil, abraded soil (after production of the artificial dust), and a natural Australian eolian dust sample taken during a dust storm. Readily released iron is not created during abrasion, and therefore the amount of readily released iron in a dust or dust-derived soil depends on processing events since the dust or soil last experienced an abrasion event. Our study develops a method for the partitioning of iron within airborne dusts and appears to be the first to consider the effect of multiple uplift events on iron partitioning.