Collaborative Research: Management and Implementation of 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: 1658318
• 负责人: Gregory Cutter
• 金额: $ 72.76万
• 依托单位: Old Dominion University Research Foundation
• 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 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1658318&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全球努力，在美国扮演着重要角色。 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，这些元素才能在全球范围内测量。了解这些元素和同位素的分布将增加对塑造其分布的过程以及取决于这些元素的过程的理解。例如，许多“痕量元素”（以非常低的元素为单位）对生活也很重要，并且它们的存在或不存在可能在海洋生态系统人群中起着至关重要的作用。该项目将在阿拉斯加和塔希提岛之间的太平洋中推出下一次美国大型地理探险队。这里颁发的奖项将支持这次探险的所有主要基础设施，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探险并收集样品所需的人员。该项目将支持沿152°W的美国地理位置Pacific Pacific Pacific Pacific Meridional Trartect的基本抽样操作和基础设施，以支持将在跟踪元素和同位素（TEI）生物体体上进行的各种个人科学项目。这是该管理建议的主要目标是：（1）计划和协调2018年60天的研究巡游； （2）使用常规的CTD/rosette，GeoTraces跟踪元素采样系统和原位泵获取各种TEI的代表性样品； （3）获取常规CTD水文数据以及离散的样品，用于盐度，溶解氧，藻类色素和在微极水平上溶解的营养素； （4）确保遵循和报告适当的QA/QC协议，并履行所有地理位置互动协议； （5）将所有水文数据准备并传递到GeoTraces数据组装中心（通过美国BCO-DMO数据中心）； （6）协调调查人员之间的所有巡航通信，包括准备水文报告/出版物。该项目还将在Clarion-Clipperton骨折区（〜7.5°N-17°N，〜155°W-1115°W）中提供TEI的基线测量值，其中计划了大规模的深海开采。环境影响评估正在与采矿业合作进行，但是采矿活动对水柱中TEI的影响是可以由Geotraces社区唯一评估的水柱。为了支持将科学传达给广大听众的努力，调查人员将招募一位对海洋科学和海洋学兴趣的早期职业自由科学记者参加巡航，并从船上进行公共宣传，摄影和/或视频，以及从船上的社交媒体，以及向国家媒体提交有关该研究的文章。该项目还将支持几位研究生。