长江口及邻近海域溶解态锰的分布及影响因素

发布时间：2018-07-09 22:30

本文选题：长江口及邻近海域 + 溶解态锰　；参考：《海洋科学进展》2016年02期

【摘要】：为研究陆架边缘海锰的生物地球化学循环,利用隐色孔雀绿-高碘酸钠催化动力学方法,对2012-03和2012-07长江口及其邻近海域调查航次采样的溶解态锰浓度进行测定。2012-03长江口及其邻近海域表、底层水体中溶解态锰浓度没有显著性差异。2012-07底层溶解态锰浓度显著高于表层。溶解态锰浓度存在显著的季节差异,2012-07平均浓度显著高于2012-03的。春、夏季溶解态锰浓度在表、底层分布整体上均呈现出由近岸到外海逐渐降低的特征,表明近岸受到河流输入的影响。2012-03长江口及其邻近海域溶解态锰基本表现为保守混合,2012-07盐度2~8海域表层发生明显的清除。两端元混合模型及相关性分析表明,该海域悬浮颗粒物(SPM)是溶解态锰的一个主要汇。此外,水团的物理混合是影响该海域溶解态锰分布的主要因素。
[Abstract]:In order to study the biogeochemical cycle of manganese in the margin of the continental shelf, the catalytic kinetic method of cryptic malachite green and sodium periodate was used. The dissolved manganese concentrations in the Yangtze Estuary and its adjacent waters were measured. The concentrations of dissolved manganese in the bottom water were not significantly different. The concentrations of dissolved manganese in the bottom layer were significantly higher than those in the surface layer. There is a significant seasonal difference in dissolved manganese concentration: the average concentration in 2012-07 is significantly higher than that in 2012-03. In spring and summer, the concentration of dissolved manganese on the surface and the bottom layer all showed the characteristics of decreasing gradually from the inshore to the offshore. The results show that the dissolved manganese in the Changjiang Estuary and its adjacent waters is obviously removed from the surface layer of the conserved mixture 2012-07 salinity 2 ~ (8) sea area due to the influence of river input on the nearshore area of the Yangtze River Estuary and its adjacent waters. The mixing model and correlation analysis show that suspended particulate matter (SPM) is a major sink of dissolved manganese. In addition, the physical mixing of water masses is the main factor affecting the distribution of dissolved manganese in the sea area.
【作者单位】：中国海洋大学;海洋化学理论与工程技术教育部重点实验室;华东师范大学;河口海岸学国家重点实验室;
【基金】：国家自然科学基金项目——长江口及东海溶解态锰的分布、形态转化及其影响机制(41176096) 国家基础研究发展计划项目——多重压力下近海生态系统的可持续产出与适应性管理的科学基础(2011CB409801) 科技部国际科技合作专项——波罗的海和东海的低氧的对比研究:以气候变化和土地利用改变为因素(2010DFA24590)
【分类号】：P734.4

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