| Dissolved Cu, Pb, Zn and Cd in the South China Sea surface waters |
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| 作者姓名： | Huo Wenmian Ji Weidong Xu Kuncan |
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| 作者单位： | Received August 10，2001; accepted September 9，2001 |
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| 基金项目： | This work was supported by the Director founds of Third Institute of Oceanography of State Oceanic Administration un-
der contr |
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| 摘 要： | The understanding of the distribution of trace heavy metals in the world ocean has greatlyimProved in the past decades. But most of the data are of vertical profiles of certain stations(Bruland, l980; Paul et al., l992; RObert et al., l990) and large--scale study of temporaland spatial variability of trace heaVy metals in the ocean is rather few. In fact, affected by ver-tical mixing by upwelling or convection, biogenic removal, atmospheric fallout and continentalinput frorn rivers, the dist…
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| 关 键 词： | The South China Sea surface waters trace heavy metals |
| 收稿时间： | 2001/8/10 0:00:00 |
| 修稿时间： | 9/9/2001 12:00:00 AM |
Dissolved Cu, Pb, Zn and Cd in the South China Sea surface waters |
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| Huo Wenmian,Ji Weidong,Xu Kuncan.Dissolved Cu, Pb, Zn and Cd in the South China Sea surface waters[J].Acta Oceanologica Sinica,2001,20(4):515-522. |
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| Authors: | Huo Wenmian Ji Weidong and Xu Kuncan |
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| Institution: | Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China |
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| Abstract: | A total of 106 surface water samples were collected in the South China Sea during two transects in June and December 1998. The samples were collected with strictly contamination free procedure and trace metals were measured by clean laboratory methods and GFAAS. The mean concentrations for the dissolved fractions are: Cu 0.100 μg/dm3, Pb 0.060 μg/dm3, Zn 0.086 μg/dm3, Cd 0.007 μg/dm3, which is close to the world open ocean's level. The spatial distribution of the trace heavy metals shows higher concentrations in offshore area and lower concentrations in the central in the South China Sea, and the concentrations decrease with the distance from the offshore, which suggests the existence of significant continental shelf input of the trace heavy metals. The correlationship among the elements is better in summer than that in winter. Cu is positively correlated with Cd in both seasons and it is also found for the first time that they are positively correlated with nutrients in the South China Sea surface waters which further indicate the biogeochemical cycle of these elements in the marine environment. The baseline value of Cu, Pb, Zn, Cd in the South China Sea surface waters is obtained through statistical analysis. |
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| Keywords: | The South China Sea surface waters trace heavy metals |
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