Lead (Pb) concentrations and Pb isotope ratios (206Pb/207Pb, 208Pb/207Pb, 206Pb/204Pb) from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018

During September 23 to November 22, 2018, the R/V Roger Revelle completed a trace element (and their isotopes) hydrographic section along ~152° West from 56° North to 20° South (GEOTRACES GP15). Full water column trace metal clean samples were obtained with the U.S. GEOTRACES Carousel (GTC) composed of 24 12-liter trace metal clean GO-Flow sampling systems mounted on a trace metal free powder-coated titanium rosette system. Three of the stations had lead (Pb) concentrations determined at Massachusetts Institute of Technology (MIT) by isotope dilution quadrupole inductively coupled plasma mass spectrometry (ICPMS) for intercalibration with the Texas A&M (TAMU) lab of Jessica Fitzsimmons who analyzed all of the cruise stations. The rest of the full- and super-stations were analyzed at MIT for Pb isotope ratios (206Pb/207Pb, 208Pb/207Pb, 206Pb/204Pb). These data are collected to document the penetration of atmosphericly-transported anthropogenic Pb into the ocean and its subsequent dispersion by circulation and chemical interactions between sinking particles and Pb dissolved in solution. Shuo Jiang, Nathan Lanning, and Edward Boyle performed the extractions and the ICPMS analyses. This dataset includes data from Leg 1 of the cruise, RR1814.

2018年9月23日至11月22日，“罗杰·雷维尔”号（R/V Roger Revelle）科考船沿西经152度、北纬56度至南纬20度的断面完成了痕量元素（及其同位素）水文断面观测（该断面属于GEOTRACES GP15计划）。研究采用美国GEOTRACES旋转架采样系统（GTC）采集全水柱痕量金属洁净样品，该系统由24套12升痕量金属洁净GO-Flow采样装置安装于无痕量金属粉末涂层钛合金采水架构成。其中3个站位的铅（Pb）浓度由麻省理工学院（Massachusetts Institute of Technology, MIT）采用同位素稀释四极杆电感耦合等离子体质谱法（isotope dilution quadrupole inductively coupled plasma mass spectrometry, ICPMS）完成测定，用于与Jessica Fitzsimmons所在的德克萨斯农工大学（Texas A&M, TAMU）实验室的分析结果进行互校——该实验室完成了本航次全部站位的样品分析。其余全站位与超级站位的铅同位素比值（206Pb/207Pb、208Pb/207Pb、206Pb/204Pb）均在MIT完成分析。本数据集旨在记录大气传输的人为源铅进入海洋的渗透过程，以及其后续通过海洋环流、沉降颗粒与溶解态铅之间的化学相互作用实现的扩散过程。Shuo Jiang、Nathan Lanning与Edward Boyle完成了样品前处理与ICPMS分析工作。本数据集包含该航次第一航段RR1814的相关数据。