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·雷弗号科考船（R/V Roger Revelle）沿西经152°、北纬56°至南纬20°海域完成了痕量元素（及其同位素）的断面水文观测航次（GEOTRACES GP15）。本次航次采用美国GEOTRACES旋转架采样系统（GTC）采集全水柱痕量金属洁净样品，该系统由安装于无痕量金属粉末涂层钛合金采样架上的24套12升痕量金属洁净GO-Flow采样装置组成。其中3个站位的铅（Pb）浓度由麻省理工学院（MIT）通过同位素稀释四极杆电感耦合等离子体质谱法（ICPMS）完成分析，以与杰西卡·菲茨西蒙斯所在的得克萨斯农工大学（Texas A&M, TAMU）实验室开展交叉校准——该实验室负责本次航次所有站位的分析工作。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。本数据集旨在记录经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发生的扩散过程。样品萃取与ICPMS测试工作由姜硕、内森·兰宁与爱德华·博伊尔完成。本数据集包含该航次第一航段RR1814的相关数据。