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计划测量 2013 年从秘鲁到塔希提岛的 GEOTTRACES 航行期间收集的海水剖面、气溶胶和热液羽流样本中的铅 (Pb) 浓度和 Pb 同位素（204Pb、206Pb、207Pb 和 208Pb）。 这些数据不仅将大大补充南太平洋现有的有限数据集，而且还将用于进一步了解该元素在海洋环境中的循环，并提高我们对相关区域铅的人为输入的了解，鉴于采矿、冶炼和化石燃料燃烧导致的铅排放量增加，这一点非常重要。 此外，来自东太平洋海隆羽流的数据将记录热液喷口系统是否有助于海洋铅预算。 就更广泛的影响而言，对于外展活动，支持者计划扩大加州大学圣克鲁斯分校西摩海洋发现中心的化学海洋学教育单位。 该项目是美国和智利科学家之间的合作成果。 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，尤其是代表性不足的科学、技术、工程和数学 (STEM) 学生，也将有机会参与这项研究，作为其论文研究的一部分。

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.