Minor and Trace Element Cycling in Sinking Marine Particles

来自伍兹霍尔海洋研究所的两名科学家将利用从北太平洋的ALOHA站和K2站回收的颗粒和溶解样品，确定曙暮光区（150-500 m深度）内微量和痕量元素的通量和循环。 研究的重点将是生物活性元素（Ba、Cd、Co、Cu、Fe、Mn、Ni、Sr、Zn）、污染元素（Pb、Hg）和地壳正常化元素（Al、Ti、Sc）。 颗粒样品包括从中性浮力沉积物捕集器（NBST）和表面系留锥管阵列（“Clap”捕集器）中回收的沉降颗粒、从原位泵中回收的悬浮颗粒以及从Go-FLO Niskin铸件中回收的溶解样品。 这项研究的地球化学数据将有助于约束元素循环，表征颗粒形成的性质，跟踪沉降过程中的颗粒成岩作用，并测试输出模型。 至于更广泛的影响，这项研究为VERTIGO（全球海洋垂直通量）计划增加了一个急需的微量金属成分，反过来，作为项目的一部分，收集了丰富的物理，化学（主要元素）和生物数据。 来自美国、新西兰、比利时、印度和日本的科学家将继续开展国际合作。

ABSTRACTOCE-0454148Two scientists from Woods Hole Oceanographic Institution will determine the flux and cycling of minor and trace elements within the twilight zone (150-500 m depth) using particulate and dissolved samples recovered from Station ALOHA and K2 in the North Pacific Ocean. The focus of the study will be on bioactive elements (Ba, Cd, Co, Cu, Fe, Mn, Ni, Sr, Zn), pollutant elements (Pb, Hg), and crustal, normalizing elements (Al, Ti, Sc). Particulate samples include sinking particles recovered from neutrally buoyant sediment traps (NBSTs) and surface tethered, drogue arrays ("Clap" traps), suspended particles from in-situ pumps, and dissolved samples from Go-FLO Niskin casts. The geochemical data from this study will help constrain elemental cycles, characterize the nature of particle formation, track particle diagenesis during sinking, and test export models. As regards broader impacts, this study adds a much needed trace metal component to the VERTIGO (VERtical Fluxes in the Global Ocean) Program and, in turn, benefits from the abundant physical, chemical (major elements), and biological data collected as part of the project. International collaborations between scientists from the United States, New Zealand, Belgium, India and Japan will continue to be forged.