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

来自马萨诸塞州理工学院和圣克鲁斯的加州大学的科学家计划测量2013年从秘鲁到塔希提岛的GEOTRACES巡航期间收集的海水剖面、气溶胶和热液羽流样本中的铅浓度和铅同位素（204 Pb、206 Pb、207 Pb和208 Pb）。 这些数据不仅将大大增加南太平洋现有的有限数据集，结果将用于进一步了解海洋环境中这种元素的循环，以及提高我们对铅人为输入感兴趣的区域的理解，这是重要的，因为采矿，冶炼和化石燃料燃烧的铅排放量增加。 此外，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收支。 就更广泛的影响而言，对于外联活动，支持者计划扩大圣克鲁斯的加州大学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的合作项目。 马萨诸塞州理工学院的一名研究生将作为该项目的一部分得到支助和培训。 本科生，特别是代表性不足的科学，技术工程和数学（STEM）的学生，也将有机会参加这项研究作为他们的论文研究的一部分。

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.