Collaborative Research: Management and Implementation of the US GEOTRACES Pacific Meridional Transect

合作研究：美国GEOTRACES太平洋经向断面的管理和实施

• 批准号: 1657781
• 负责人: Phoebe Lam
• 金额: $ 50.22万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1657781&HistoricalAwards=false
• 关键词: Collaborative; Research; Management; Implementation; US

GEOTRACES is a global effort in the field of Chemical Oceanography in which the United States plays a major role. The goal of the GEOTRACES program is to understand the distributions of many elements and their isotopes in the ocean. Until quite recently, these elements could not be measured at a global scale. Understanding the distributions of these elements and isotopes will increase the understanding of processes that shape their distributions and also the processes that depend on these elements. For example, many "trace elements" (elements that are present in very low amounts) are also important for life, and their presence or absence can play a vital role in the population of marine ecosystems. This project will launch the next major U.S. GEOTRACES expedition in the Pacific Ocean between Alaska and Tahiti. The award made here would support all of the major infrastructure for this expedition, including the research vessel, the sampling equipment, and some of the core oceanographic measurements. This project will also support the personnel needed to lead the expedition and collect the samples.This project would support the essential sampling operations and infrastructure for the U.S. GEOTRACES Pacific Meridional Transect along 152° W to support a large variety of individual science projects on trace element and isotope (TEI) biogeochemistry that will follow. Thus, the major objectives of this management proposal are: (1) plan and coordinate a 60 day research cruise in 2018; (2) obtain representative samples for a wide variety of TEIs using a conventional CTD/rosette, GEOTRACES Trace Element Sampling Systems, and in situ pumps; (3) acquire conventional CTD hydrographic data along with discrete samples for salinity, dissolved oxygen, algal pigments, and dissolved nutrients at micro- and nanomolar levels; (4) ensure that proper QA/QC protocols are followed and reported, as well as fulfilling all GEOTRACES intercalibration protocols; (5) prepare and deliver all hydrographic data to the GEOTRACES Data Assembly Centre (via the US BCO-DMO data center); and (6) coordinate all cruise communications between investigators, including preparation of a hydrographic report/publication. This project would also provide baseline measurements of TEIs in the Clarion-Clipperton fracture zone (~7.5°N-17°N, ~155°W-115°W) where large-scale deep sea mining is planned. Environmental impact assessments are underway in partnership with the mining industry, but the effect of mining activities on TEIs in the water column is one that could be uniquely assessed by the GEOTRACES community. In support of efforts to communicate the science to a wide audience the investigators will recruit an early career freelance science journalist with interests in marine science and oceanography to participate on the cruise and do public outreach, photography and/or videography, and social media from the ship, as well as to submit articles about the research to national media. The project would also support several graduate students.

GEOTRACES 是化学海洋学领域的一项全球性努力，其中美国发挥着重要作用。GEOTRACES 计划的目标是了解许多元素及其同位素在海洋中的分布，直到最近，这些元素还无法了解。了解这些元素和同位素的分布将增加对形成其分布的过程以及依赖于这些元素的过程的理解，例如，许多“痕量元素”（存在于其中的元素）。非常低的数量）对生命也很重要，它们的存在或不存在对海洋生态系统的种群起着至关重要的作用，该项目将启动美国在阿拉斯加和塔希提岛之间的太平洋的下一次大型地理追踪考察。该项目将为这次考察的所有主要基础设施提供支持，包括研究船、采样设备和一些核心海洋学测量。该项目还将支持领导考察和收集样本所需的人员。必要的采样操作和基础设施沿西经 152° 的美国 GEOTRACES 太平洋经线横断面，支持随后开展的各种关于微量元素和同位素 (TEI) 生物地球化学的单独科学项目。 因此，该管理提案的主要目标是：(1) 规划和协调 60 个项目。 2018 年的一日研究巡航；(2) 使用传统 CTD/玫瑰花结、GEOTRACES 微量元素采样系统获取各种 TEI 的代表性样本，和原位泵；(3) 获取传统的 CTD 水文数据以及微摩尔和纳摩尔水平的盐度、溶解氧、藻类色素和溶解营养物的离散样本；(4) 确保遵循和报告适当的 QA/QC 协议。 ，以及履行所有 GEOTRACES 相互校准协议；(5) 准备所有水文数据并将其传送至 GEOTRACES 数据组装中心（通过美国 BCO-DMO 数据中心）；以及 (6) 协调之间的所有巡航通信；该项目还将提供克拉里昂-克利珀顿断裂带（~7.5°N-17°N，~155°W-115°W）大范围 TEI 的基线测量。正在计划与采矿业合作进行环境影响评估，但采矿活动对水体中 TEI 的影响可以由 GEOTRACES 社区进行独特的评估，以支持沟通工作。调查人员将招募一名对海洋科学和海洋学感兴趣的早期职业自由科学记者参加巡航并在船上进行公共宣传、摄影和/或摄像以及社交媒体，以及该项目还将支持几名研究生。

项目成果

Isotopes illustrate vertical transport of anthropogenic Pb by reversible scavenging within Pacific Ocean particle veils

同位素说明了太平洋颗粒幕内人为铅通过可逆清除的垂直输送

• DOI: 10.1073/pnas.2219688120
• 发表时间: 2023-05-30
• 期刊: Proceedings of the National Academy of Sciences of the United States of America
• 影响因子: 11.1
• 作者: N. Lanning;Shuo Jiang;Vinícius J. Amaral;Katherine Mateos;Janelle M Steffen;P. Lam;E. Boyle;J. Fitzsimmons
• 通讯作者: J. Fitzsimmons

An intermediate-depth source of hydrothermal 3He and dissolved iron in the North Pacific

北太平洋热液 3He 和溶解铁的中深度来源

• DOI: 10.1016/j.epsl.2020.116223
• 发表时间: 2020-06-01
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: W. J. Jenkins;M. Hatta;J. Fitzsimmons;R. Schlitzer;N. Lanning;Alan Shiller;N. R. Buckley;C. R. German;D. Lott;G. Weiß;L. Whitmore;K. Casciotti;Phoebe J. Lam;G. Cutter;K. Cahill
• 通讯作者: K. Cahill