Atmospheric deposition of soluble trace elements along the Atlantic Meridional Transect (AMT)
Atmospheric deposition of soluble trace elements along the Atlantic Meridional Transect (AMT)
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DOI：
10.1016/j.pocean.2016.10.002
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发表时间：
2017-11-01
影响因子：
4.1
通讯作者：
Jickells, Tim D.
中科院分区：
文献类型：
--
作者：
Baker, Alex R.;Jickells, Tim D.
我们简要回顾了大气沉降测量的作用在大西洋经向断面（AMT）计划，然后继续提出新的数据的范围内的痕量金属（铁，铝，锰，钛，锌，V，镍和铜）和主要离子的可溶性浓度收集沿着AMT断面的气溶胶。结果使我们能够确定排放源的微量金属，特别是在相对重要性的人为与地壳来源。我们确定的浓度和沉积的地壳和生物来源的金属与高得多的输入到北大西洋相比，南大西洋，反映了更强的陆基排放源在北方半球的强梯度。我们认为，Ni和V的人为来源可能包括一个重要的组成部分，从shipping.We认为在何种程度上这些梯度反映在地表水中的这些金属的浓度的基础上的GEOTRACES水柱痕量金属数据。我们发现北大西洋和南大西洋环流之间地表水溶解的Al和Fe浓度存在明显差异，反映了大气输入。然而，对于锰，钒或镍，较高的输入到北大西洋相比，南大西洋没有明确反映在其水柱浓度。(c)2016年6月，作者。爱思唯尔有限公司出版
We briefly review the role of atmospheric deposition measurements within the Atlantic Meridional Transect (AMT) programme and then go on to present new data on the soluble concentrations of a range of trace metals (Fe, Al, Mn, Ti, Zn, V, Ni and Cu) and major ions in aerosols collected along the AMT transect. The results allow us to identify emission sources of the trace metals particularly in terms of the relative importance of anthropogenic versus crustal sources. We identify strong gradients in concentrations and deposition for both crustal and anthropogenically sourced metals with much higher inputs to the North Atlantic compared to the South Atlantic, reflecting stronger land based emission sources in the Northern Hemisphere. We suggest anthropogenic sources of Ni and V may include an important component from shipping.We consider the extent to which these gradients are reflected in surface water concentrations of these metals based on the GEOTRACES water column trace metal data. We find there is a clear difference in the concentrations of surface water dissolved Al and Fe between the north and south Atlantic gyres reflecting atmospheric inputs. However for Mn, V or Ni, higher inputs to the North Atlantic compared to the South Atlantic are not clearly reflected in their water column concentrations. (c) 2016 The Authors. Published by Elsevier Ltd.