Collaborative Research: GEOTRACES Pacific section: Spatial variability of lead concentrations and isotopic compositions in the Eastern Tropical South Pacific

来自麻省理工学院和加州大学圣克鲁斯分校的科学家们计划测量2013年GEOTRACES从秘鲁到塔希提岛的巡航中收集的海水剖面、气溶胶和热液柱样本中的铅（Pb）浓度和Pb同位素（204Pb、206Pb、207Pb和208Pb）。这些数据不仅将大大增加南太平洋现有的有限数据集，而且结果将用于进一步了解该元素在海洋环境中的循环，并提高我们对铅在感兴趣区域的人为输入的理解，这一点很重要，因为采矿，冶炼和化石燃料燃烧导致铅排放增加。此外，来自东太平洋隆起羽流的数据将证明热液喷口系统是否对海洋Pb收支有所贡献。就更广泛的影响而言，为了拓展活动，支持者计划扩大加州大学圣克鲁斯分校西摩海洋探索中心的化学海洋学教育单元。该项目是美国和智利科学家的合作成果。作为该项目的一部分，麻省理工学院的一名研究生将得到支持和培训。本科生，特别是代表性不足的科学、技术、工程和数学（STEM）专业的学生，也有机会参与这项研究，作为他们论文研究的一部分。

Scientists from Massachusetts Institute of Technology and the University of California, Santa Cruz, plan to measure lead (Pb) concentrations and Pb isotopes (204Pb, 206Pb, 207Pb and 208Pb) in seawater profiles, aerosols, and hydrothermal plume samples collected during the 2013 GEOTRACES cruise from Peru to Tahiti. Not only will the data significantly add to the limited data set existing for the South Pacific Ocean, results will be used to further our knowledge on the cycling of this element in the marine environment, as well as improve our understanding of anthropogenic inputs of Pb to the region of interest which is important given increases in lead emissions from mining, smelting, and fossil fuel combustion. In addition, data from the East Pacific Rise plume will document whether hydrothermal vent systems contribute to the oceanic Pb budget. In terms of the broader impacts, for outreach activities, the proponents plan to expand the Chemical Oceanography educational unit at the Seymour Marine Discovery Center of the University of California, Santa Cruz. The project is a collaborative effort between scientists in the United States and Chile. One graduate student from Massachusetts Institute of Technology would be supported and trained as part of this project. Undergraduate students, especially under-represented Science, Technology Engineering, and Mathematics (STEM) students, would also have the opportunity to participate in this study as part of their thesis research.