Collaborative Research: Constraining the role of chemical transformations in the cycling of mercury at the Arctic Ocean air-sea interface
合作研究:限制化学转化在北冰洋海气界面汞循环中的作用
基本信息
- 批准号:1854454
- 负责人:
- 金额:$ 48.23万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2020
- 资助国家:美国
- 起止时间:2020-01-01 至 2023-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project will provide new understanding about mercury exchange between the air and sea surface in the Arctic, in conjunction with studies of the forms of mercury in seawater. Results will help predict how increasing ice melt and warming waters will affect mercury levels in polar regions. The investigators will use a novel approach of comparing the dynamics of radon, an unreactive gas, and mercury, which is reactive in all its forms, to understand the importance of chemical and biological reactions influencing mercury levels in seawater. Results will be useful for the international Minamata Convention and resource managers concerned with mercury bioaccumulation in humans and wildlife. The project will train a post-doctoral investigator, who will be involved in all aspects of the research, as well as provide research experience for undergraduate students. The investigators also plan to create outreach publications for non-specialists and highlight the work on their websites.This project will combine shipboard measurements and incubation experiments to improve our understanding of the cycling of inorganic and methylated mercury across the water-air interface and the role of ice cover in affecting this exchange. To separate gas exchange from redox reactions and other transformations in surface waters, the investigators will collect samples for the determination of radon and radium, as the mixed layer deficit in radon can be used as an independent estimate of the gas exchange flux. The investigators will test the hypotheses that: 1) gas evasion of mercury is not the primary sink for water column mercury in the Arctic Ocean, in contrast to other oceans; 2) in situ water column degradation of dimethylmercury is a more important sink than loss to the atmosphere; and 3) the relatively low net production of mercury in the Arctic reflects lower ultraviolet light levels and ice cover, productivity, and bioavailable mercury for reduction. Results will help predict how the bioaccumulation of methylmercury may be altered by a changing climate and an evolving Arctic sea ice regime.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.
该项目将结合对海水中汞形态的研究,提供对北极空气和海面之间汞交换的新认识。研究结果将有助于预测不断增加的冰融化和变暖的沃茨将如何影响极地地区的汞含量。研究人员将使用一种新的方法来比较氡(一种非反应性气体)和汞(一种具有各种形式的反应性气体)的动态,以了解化学和生物反应影响海水中汞含量的重要性。研究结果将有助于国际水俣公约和资源管理人员关注汞在人类和野生动物中的生物累积。该项目将培养一名博士后研究员,他将参与研究的各个方面,并为本科生提供研究经验。研究人员还计划为非专业人员编写宣传出版物,并在他们的网站上突出介绍这项工作。该项目将联合收割机船上测量和孵化实验相结合,以提高我们对无机汞和甲基化汞在水-空气界面上的循环以及冰盖在影响这种交换中的作用的理解。为了将气体交换与表面沃茨中的氧化还原反应和其他转化分开,调查人员将收集样品用于测定氡和镭,因为氡的混合层缺陷可用作气体交换通量的独立估计。调查人员将检验以下假设:1)与其他海洋相比,汞的气体逃逸不是北冰洋水柱汞的主要汇; 2)与大气损失相比,二甲基汞的原位水柱降解是更重要的汇; 3)北极地区汞的净产量相对较低,反映了较低的紫外线水平和冰盖、生产力和生物可利用汞的减少。研究结果将有助于预测甲基汞的生物累积如何被不断变化的气候和不断演变的北极海冰制度所改变。该奖项反映了NSF的法定使命,并被认为值得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来支持。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Description of a Dimethylmercury Automatic Analyzer for the High-Resolution Measurement of Dissolved Gaseous Mercury Species in Surface Ocean Waters
用于高分辨率测量表层海水中溶解气态汞形态的二甲基汞自动分析仪的描述
- DOI:10.1021/acs.est.2c02908
- 发表时间:2022
- 期刊:
- 影响因子:11.4
- 作者:He, Yipeng;Shi, Xiangming;Huffman, Wesley W.;Lamborg, Carl H.;Mason, Robert P.
- 通讯作者:Mason, Robert P.
Sediment-water fluxes of inorganic carbon and nutrients in the Pacific Arctic during the sea ice melt season
- DOI:10.1016/j.csr.2023.105116
- 发表时间:2023-09
- 期刊:
- 影响因子:2.3
- 作者:Lauren J. Barrett;P. Vlahos;Douglas E. Hammond;Robert P. Mason
- 通讯作者:Lauren J. Barrett;P. Vlahos;Douglas E. Hammond;Robert P. Mason
Linked mercury methylation and nitrification across oxic subpolar regions
亚极地含氧区域的汞甲基化和硝化作用相关
- DOI:10.3389/fenvc.2023.1109537
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Despins, Marissa C.;Mason, Robert P.;Aguilar-Islas, Ana M.;Lamborg, Carl H.;Hammerschmidt, Chad R.;Newell, Silvia E.
- 通讯作者:Newell, Silvia E.
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Robert Mason其他文献
The acute local effects of prednisone on the gastric mucosa
- DOI:
10.1007/bf02239212 - 发表时间:
1968-01-01 - 期刊:
- 影响因子:2.500
- 作者:
A. Thomas Smith;Robert Mason;Harry Oberhelman - 通讯作者:
Harry Oberhelman
Flavour oscillations in pseudo-Hermitian quantum theories
伪厄米量子理论中的风味振荡
- DOI:
10.22323/1.449.0498 - 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Robert Mason;Peter Millington;Esra Sablevice - 通讯作者:
Esra Sablevice
A computational framework to support probabilistic criticality modelling for the geological disposal of radioactive waste
- DOI:
10.1016/j.anucene.2024.110965 - 发表时间:
2025-02-01 - 期刊:
- 影响因子:
- 作者:
E. Adam Paxton;Jiejie Wu;Tim Hicks;Slimane Doudou;David Applegate;Robert Mason;Andrew Price;Liam Payne - 通讯作者:
Liam Payne
Palliation of malignant dysphagia: an alternative to surgery.
恶性吞咽困难的缓解:手术的替代方案。
- DOI:
- 发表时间:
1996 - 期刊:
- 影响因子:1.4
- 作者:
Robert Mason - 通讯作者:
Robert Mason
Stratification of bile in the normal gallbladder during intravenous cholangiography
- DOI:
10.1007/bf02233093 - 发表时间:
1968-09-01 - 期刊:
- 影响因子:2.500
- 作者:
Harry Newman;Theodore Ditchek;Robert Mason - 通讯作者:
Robert Mason
Robert Mason的其他文献
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{{ truncateString('Robert Mason', 18)}}的其他基金
Constraining the air-sea exchange of inorganic and methylated mercury with high resolution spatial and temporal measurements in the Sargasso Sea
通过马尾藻海的高分辨率空间和时间测量限制无机汞和甲基化汞的海气交换
- 批准号:
2319385 - 财政年份:2023
- 资助金额:
$ 48.23万 - 项目类别:
Standard Grant
Collaborative Research: The effects of terrestrial organic matter inputs on coastal mercury cycling, methylmercury production and bioaccumulation
合作研究:陆地有机物质输入对沿海汞循环、甲基汞产生和生物累积的影响
- 批准号:
2148407 - 财政年份:2022
- 资助金额:
$ 48.23万 - 项目类别:
Standard 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:
$ 48.23万 - 项目类别:
Continuing Grant
The brain organization of STEM concept knowledge: a neurally-based foundation for training, measuring, and assessing concept learning from basic knowledge to expertise
STEM概念知识的大脑组织:基于神经的基础,用于训练、测量和评估从基础知识到专业知识的概念学习
- 批准号:
2215741 - 财政年份:2022
- 资助金额:
$ 48.23万 - 项目类别:
Standard Grant
Methylated mercury sources and cycling in the high latitude North Atlantic
北大西洋高纬度地区的甲基化汞来源和循环
- 批准号:
2123575 - 财政年份:2021
- 资助金额:
$ 48.23万 - 项目类别:
Standard Grant
Assessing the changes in the brain representations of individual STEM concepts in the course of learning
评估学习过程中各个 STEM 概念的大脑表征的变化
- 批准号:
1748897 - 财政年份:2018
- 资助金额:
$ 48.23万 - 项目类别:
Standard Grant
US GEOTRACES Pacific Meridional Transect: Determination of the air-sea exchange of inorganic and methylated mercury in the anthropogenically-impacted and remote Pacific Ocean
美国 GEOTRACES 太平洋经线横断面:测定受人为影响的偏远太平洋中无机汞和甲基化汞的海气交换
- 批准号:
1736659 - 财政年份:2017
- 资助金额:
$ 48.23万 - 项目类别:
Standard Grant
Examining the role of nanoparticles in the formation and degradation of methylated mercury in the ocean
研究纳米粒子在海洋中甲基化汞的形成和降解中的作用
- 批准号:
1607913 - 财政年份:2016
- 资助金额:
$ 48.23万 - 项目类别:
Standard Grant
Support for activities related to the 13th International Conference of Mercury as a Global Pollutant
支持第十三届汞作为全球污染物国际会议的相关活动
- 批准号:
1633908 - 财政年份:2016
- 资助金额:
$ 48.23万 - 项目类别:
Continuing Grant
Collaborative research: Transformations and mercury isotopic fractionation of methylmercury by marine phytoplankton
合作研究:海洋浮游植物对甲基汞的转化和汞同位素分馏
- 批准号:
1634048 - 财政年份:2016
- 资助金额:
$ 48.23万 - 项目类别:
Standard Grant
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