U.S. GEOTRACES Pacific Meridional Transect: Measurements of Actinium-227 to Trace Solute Transport

美国 GEOTRACES 太平洋经线横断面:通过测量 Actinium-227 来追踪溶质迁移

基本信息

  • 批准号:
    1830168
  • 负责人:
  • 金额:
    $ 13.88万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-08-15 至 2022-07-31
  • 项目状态:
    已结题

项目摘要

The goal of the international GEOTRACES program is to understand the distributions of trace chemical elements and their isotopes in the oceans. This project will support the measurement of the naturally occurring radioisotope actinium-227 (Ac-227) in water samples from the 2018 U.S. GEOTRACES expedition in the Pacific Ocean, running south from Alaska to Tahiti. In addition, the investigators plan to analyze lead-210 and actinium-227 in sediment cores collected by the project, in order to constrain the source of Ac-227 to the water from bottom sediments. The value of measuring Ac-227 in the water column, particularly if the bottom source function is known, lies in the potential to use it to measure rates of mixing and transport of the water. These transport estimates can then be applied to understand the distributions of other trace elements measured on the expedition. The project would support a graduate student, several undergraduates, and a high school student, as well as outreach to local veterans groups encouraging their participation in STEM programs.Despite having a half-life (22 years) that is well suited for the study of both vertical and lateral transport in the deep ocean, few Ac-227 measurements have been made in the deep sea. Recent advances in instrumentation facilitate this analysis, and the synergy provided by the GEOTRACES program will provide an ideal opportunity to obtain additional data. In addition, Ac-227 will be of value in defining the spatial variability of mixing rates across a broad reach of the central Pacific, particularly when combined with estimates based on Ra-228 (6 year half-life) distribution, a tracer field that a collaborating GEOTRACES program will determine. By using multiple tracers with different half-lives, influences of mixing and advection may be distinguished, allowing a more complete understanding of the deep Pacific dynamics. These transport estimates can then be applied to concentration fields of other solutes, including metals and nutrients, but will be of particular importance for alkalinity and silicic acid, which should have strong benthic sources.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
国际GEOTRACES项目的目标是了解海洋中微量化学元素及其同位素的分布。该项目将支持测量2018年美国GEOTRACES探险队在太平洋(从阿拉斯加向南到塔希提岛)采集的水样中天然存在的放射性同位素锕-227 (Ac-227)。此外,研究人员计划分析该项目收集的沉积物岩心中的铅-210和锕-227,以便将Ac-227的来源限制在底部沉积物的水中。测量水柱中Ac-227的价值,特别是在已知底源函数的情况下,在于有可能用它来测量水的混合率和输送率。这些运输估计可以用来了解考察中测量到的其他微量元素的分布。该项目将支持一名研究生、几名本科生和一名高中生,并与当地退伍军人团体联系,鼓励他们参与STEM项目。尽管Ac-227的半衰期(22年)非常适合研究深海中的垂直和横向输送,但在深海中很少进行Ac-227的测量。仪器仪表的最新进展促进了这种分析,GEOTRACES程序提供的协同作用将为获得额外数据提供理想的机会。此外,Ac-227在确定太平洋中部广阔海域混合率的空间变异性方面具有价值,特别是与基于Ra-228(6年半衰期)分布的估计相结合时,这是GEOTRACES合作项目将确定的示踪剂领域。通过使用具有不同半衰期的多种示踪剂,可以区分混合和平流的影响,从而更全面地了解太平洋深部动力学。然后,这些迁移估计可以应用于其他溶质的浓度领域,包括金属和营养物,但对碱度和硅酸将特别重要,因为它们应该有很强的底栖生物来源。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Abyssal Pathways and the Double Silica Maximum in the Northeast Pacific Basin
东北太平洋盆地的深渊通道和双二氧化硅最大值
  • DOI:
    10.1029/2020gl089010
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
    Hautala, Susan L.;Hammond, Douglas E.
  • 通讯作者:
    Hammond, Douglas E.
{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Douglas Hammond其他文献

Publish or perish? A survey of abstracts accepted for meetings of the British Association of Oral and Maxillofacial Surgeons, and subsequently published
  • DOI:
    10.1016/j.bjoms.2009.08.037
  • 发表时间:
    2010-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Jonathan M. Collier;Navin Vig;Douglas Hammond
  • 通讯作者:
    Douglas Hammond

Douglas Hammond的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Douglas Hammond', 18)}}的其他基金

GEOTRACES Arctic Section: Actinium-227 as a Naturally-occurring Tracer of Dissolved Material Transport in the Arctic Ocean
GEOTRACES 北极部分:Actinium-227 作为北冰洋溶解物质运输的天然示踪剂
  • 批准号:
    1436958
  • 财政年份:
    2014
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Collaborative Research: Use of Triple Oxygen Isotopes and O2/Ar to constrain Net/Gross Oxygen Production during upwelling and non-upwelling periods in a Coastal Setting
合作研究:使用三重氧同位素和 O2/Ar 来限制沿海地区上升流和非上升流期间的净/总氧气产量
  • 批准号:
    1260692
  • 财政年份:
    2013
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
GEOTRACES Pacific Section: 227Ac Distribution in Deep Waters as a Constraint on Mixing and Mass Transport of Solutes
GEOTRACES 太平洋部分:深水中的 227Ac 分布作为溶质混合和传质的约束
  • 批准号:
    1235124
  • 财政年份:
    2013
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Germanium Isotope Systematics in Marine Systems
海洋系统中的锗同位素系统学
  • 批准号:
    1061700
  • 财政年份:
    2011
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
COLLABORATIVE RESEARCH (USC-UW): Evaluating Seawater Circulation Rates Through Permeable Sediments, Using Naturally Occurring Rn and Ra Isotopes
合作研究 (USC-UW):利用天然存在的 Rn 和 Ra 同位素评估可渗透沉积物的海水循环率
  • 批准号:
    0623413
  • 财政年份:
    2006
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Collaborative Research: Examination of the Potential Sources for the Mid-Water Silica Anomaly in the NE Pacific
合作研究:检查东北太平洋中层水体二氧化硅异常的潜在来源
  • 批准号:
    0452088
  • 财政年份:
    2005
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Collaborative Research (OSU and USC): Evaluating the Utility of Germanium Isotopes as a Paleoproxy
合作研究(俄勒冈州立大学和南加州大学):评估锗同位素作为古代理的效用
  • 批准号:
    0326575
  • 财政年份:
    2003
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
The Use of 15NH3 to Estimate Fractionation of Nitrogen Isotopes during Diagenesis of Organic Matter
使用 15NH3 估算有机质成岩过程中氮同位素的分馏
  • 批准号:
    0136500
  • 财政年份:
    2002
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Collaborative Studies (USC and UM): Fractionation of Ge and Si during Diagenesis, and its Implications for Regulating the Oceanic Ge/Si Ratio
合作研究(南加州大学和密歇根大学):成岩过程中 Ge 和 Si 的分馏及其对调节海洋 Ge/Si 比率的影响
  • 批准号:
    9911608
  • 财政年份:
    2000
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Application of 222Rn as a Tracer to Study Gas Hydrate Dynamics
应用 222Rn 作为示踪剂研究天然气水合物动力学
  • 批准号:
    9730817
  • 财政年份:
    1998
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Continuing Grant

相似海外基金

Collaborative Research: US GEOTRACES GP-17-OCE: Molecular speciation of trace element-ligand complexes in the South Pacific Ocean
合作研究:US GEOTRACES GP-17-OCE:南太平洋微量元素-配体复合物的分子形态
  • 批准号:
    2422713
  • 财政年份:
    2023
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Collaborative Research: US GEOTRACES GP17-OCE and -ANT Sections: External sources, cycling and processes affecting mercury in the South Pacific and Southern Oceans
合作研究:US GEOTRACES GP17-OCE 和 -ANT 部分:影响南太平洋和南大洋汞的外部来源、循环和过程
  • 批准号:
    2349825
  • 财政年份:
    2023
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Continuing Grant
Collaborative Research: US GEOTRACES GP-17-OCE and -ANT Sections: External sources, cycling and processes affecting mercury speciation in the South Pacific and Southern Oceans
合作研究:US GEOTRACES GP-17-OCE 和 -ANT 部分:影响南太平洋和南大洋汞形态的外部来源、循环和过程
  • 批准号:
    2151677
  • 财政年份:
    2022
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Continuing Grant
US GEOTRACES GP17-OCE and GP17-ANT: Inorganic Carbon Cycling in the South Pacific and Southern Oceans by Direct Measurement
美国 GEOTRACES GP17-OCE 和 GP17-ANT:通过直接测量南太平洋和南大洋的无机碳循环
  • 批准号:
    2148468
  • 财政年份:
    2022
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Continuing Grant
Collaborative Research: US GEOTRACES GP-17- OCE and -ANT Sections: External sources, cycling and processes affecting mercury speciation in the South Pacific and Southern Oceans
合作研究:US GEOTRACES GP-17- OCE 和 -ANT 部分:影响南太平洋和南大洋汞形态的外部来源、循环和过程
  • 批准号:
    2152636
  • 财政年份:
    2022
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Continuing Grant
Collaborative Research: US GEOTRACES GP17-OCE and -ANT Sections: External sources, cycling and processes affecting mercury in the South Pacific and Southern Oceans
合作研究:US GEOTRACES GP17-OCE 和 -ANT 部分:影响南太平洋和南大洋汞的外部来源、循环和过程
  • 批准号:
    2152649
  • 财政年份:
    2022
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Continuing Grant
US GEOTRACES GP17-OCE and GP17-ANT: Particulate and biogenic trace elements in the South Pacific and Southern Ocean
美国 GEOTRACES GP17-OCE 和 GP17-ANT:南太平洋和南大洋的颗粒和生物微量元素
  • 批准号:
    2049272
  • 财政年份:
    2021
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Continuing Grant
Collaborative Research: US GEOTRACES GP-17-OCE: Molecular speciation of trace element-ligand complexes in the South Pacific Ocean
合作研究:US GEOTRACES GP-17-OCE:南太平洋微量元素-配体复合物的分子形态
  • 批准号:
    2048887
  • 财政年份:
    2021
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
Collaborative Research: US GEOTRACES GP17-OCE: Understanding neodymium isotopes and rare earth element systematics in the South Pacific
合作研究:US GEOTRACES GP17-OCE:了解南太平洋的钕同位素和稀土元素系统学
  • 批准号:
    2049604
  • 财政年份:
    2021
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
US GEOTRACES GP17-OCE and GP17-ANT: Cobalt Biogeochemical Cycling and Phytoplankton Protein Biomarkers in the Pacific and Southern Oceans
美国 GEOTRACES GP17-OCE 和 GP17-ANT:太平洋和南大洋的钴生物地球化学循环和浮游植物蛋白生物标志物
  • 批准号:
    2048774
  • 财政年份:
    2021
  • 资助金额:
    $ 13.88万
  • 项目类别:
    Standard Grant
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了