The influence of organic matter and atmospheric deposition on the particulate trace metal concentration of northwest Atlantic surface seawater
The influence of organic matter and atmospheric deposition on the particulate trace metal concentration of northwest Atlantic surface seawater
复制标题
有机质和大气沉降对西北大西洋表层海水颗粒物痕量金属浓度的影响
DOI：
10.1016/0304-4203(77)90004-4
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发表时间：
1977
期刊：
影响因子：
3
通讯作者：
R. Duce
中科院分区：
文献类型：
--
作者：
G. Wallace;G. Hoffman;R. Duce
对美国新英格兰海岸和百慕大之间采集的一系列表层水桶样品中的颗粒痕量金属(PTM)、有机碳(POC)和有机氮(PON)进行了测量。PTM浓度低于或等于文献中报道的最低PTM浓度。研究了PtM与颗粒铝和碳的相对变化，得出结论：有机质可能是公海表层水域PtM丰度的调节因素，在这方面对大陆架和斜坡水域也很重要。在百慕大和马尾藻海表层水颗粒物采样的大气中，痕量金属相对于其地壳丰度的富集率被发现是相似的。建立了一个简单的垂直通量模式，该模式表明大气输入到马尾藻海的痕量金属与混合层中与POC相关的下沉去除PTM的速率大致相同。马尾藻海混合层中的Al、Fe、Mn颗粒基本上都来自风成源。其他大气来源的痕量金属在马尾藻海混合层中的去向被认为是它们在海水中的溶解度的函数。
Particulate trace metals (PTM), organic carbon (POC), and organic nitrogen (PON) were measured in a series of surface bucket samples collected between the New England coast of the United States and Bermuda. PTM concentrations were lower or equivalent to the lowest PTM concentrations reported in the literature. Examination of the relative variations in PTM with respect to particulate aluminum and carbon led to the conclusion that organic matter was the probable regulator of PTM abundance in open-ocean surface waters and was important in this respect for continental shelf and slope waters as well.Enrichment factors of trace metals relative to their crustal abundances were found to be similar in the atmosphere sampled in Bermuda and in Sargasso Sea surface water particulate matter. A simplistic vertical flux model was constructed which showed atmospheric input of trace metals to the Sargasso Sea to be of the same approximate magnitude as the rate of removal of PTM from the mixed layer by sinking in association with POC. Essentially all of the particulate Al, Fe, and Mn in the Sargasso Sea mixed layer was attributed to aeolian sources. The fate of other atmospherically derived trace metals in the Sargasso Sea mixed layer was suggested to be a function of their solubility in seawater.