Size-fractionated major, minor, & trace particle composition and concentration 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 Sept to Oct 2018

Size-fractionated particles were collected by in-situ filtration on the U.S. GEOTRACES GP15 Pacific Meridional Transect (PMT), which sampled from Alaska to Tahiti along 152°W Sept-Nov 2018. The PMT expedition was divided into two legs, with cruise IDs RR1814 and RR1815. This dataset results from leg 1, RR1814; data from RR1815 are available in a separate BCO-DMO dataset. This dataset includes a suite of trace elements (e.g. iron, aluminum, zinc, manganese, cadmium, copper, cobalt, titanium, and barium), some of which are required for life, and others that act as tracers of oceanographic processes, and major biologically-produced carrier phases (e.g. particulate organic carbon and the biominerals, calcium carbonate and biogenic silica) in the size-fractionated particles collected from the US PMT section. Along with collaboration with researchers from other institutions, these data are used to assess the relative importance of particle concentration, composition, and size distribution on the cycling and removal of trace elements and their isotopes (TEIs).本数据集的样品依托美国全球海洋痕量元素与同位素研究计划（GEOTRACES）GP15太平洋经向断面（Pacific Meridional Transect, PMT）采集，于2018年9月至11月沿152°W经线从阿拉斯加至塔希提开展原位过滤，获取粒径分级颗粒样品。本次PMT考察航次分为两个航段，航次编号分别为RR1814与RR1815。本数据集来自第一航段RR1814，RR1815航段的数据已收录于独立的BCO-DMO数据集。 本数据集包含一系列痕量元素（例如铁、铝、锌、锰、镉、铜、钴、钛与钡），其中部分为生命活动所必需，其余可作为海洋学过程的示踪剂；同时涵盖了该断面采集的粒径分级颗粒样品中，由生物作用生成的主要载体相物质，包括颗粒有机碳、碳酸钙与生物成因二氧化硅等生物矿物。本数据集联合其他科研机构研究者的协作成果，用于评估颗粒浓度、组成与粒径分布在痕量元素及其同位素（trace elements and their isotopes, TEIs）的循环与移除过程中的相对重要性。