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Marine Biogeochemistry of 210Po and 210Pb and Their Implications Regarding the Cycling and Export of Particles

Abstract

本研究系统、深入地研究了五个具有典型特征海区(南极普里兹湾及其邻近海域、寡营养盐低叶绿素(LNLC)的南沙海域、南沙群岛珊瑚礁生态系、厦门湾和九龙江河口区)210Po和210Pb的生物地球化学行为,并在此基础上应用210Po/210Pb不平衡示踪了颗粒物及相关生源要素的循环与输出。该论文主要研究结果如下:1.不同营养状况大洋水中210Po、210Pb的地化行为:表层大洋水体中210Po、210Pb主要以溶解态形式存在,但不同营养状况的大洋环境中,210Po、210Pb的地球化学行为存在比较明显的差异。微生物和颗粒物是影响210Po地化行为的两个主要因素。在寡营养的南沙海域,由于生源颗粒相对贫乏...Biogeochemical cycle of dissolved and particulate 210Po and 210Pb, along with their disequilibria in five typical sea areas, i.e. the Prydz Bay and its adjacent waters, the Southern South China Sea with low nutrients and low chlorophyll-a (LNLC), the Zhubi coral reef lagoon, the Xiamen Bay and the Jiulong River estuary, and their applications in the cycling and export of particulate matter related...学位:理学博士院系专业:海洋与环境学院海洋学系_海洋化学学号:B20022700

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