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:1854462
- 负责人:
- 金额:$ 40.05万
- 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式的研究,对北极空气和海面之间的汞交换提供新的认识。研究结果将有助于预测不断增加的冰融化和变暖的海水将如何影响极地地区的汞含量。研究人员将采用一种新的方法来比较氡(一种非活性气体)和汞(一种各种形式的活性气体)的动力学,以了解影响海水中汞含量的化学和生物反应的重要性。研究结果将对国际《水俣公约》和有关人类和野生动物体内汞生物积累的资源管理人员有用。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。调查人员还计划为非专业人士制作外联出版物,并在他们的网站上突出他们的工作。该项目将结合船上测量和孵化实验,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方面的作用的理解。为了将气体交换与地表水中的氧化还原反应和其他转化分离,研究人员将收集样品以测定氡和镭,因为氡的混合层亏空可用作气体交换通量的独立估计。研究人员将测试以下假设:1)与其他海洋不同,北冰洋水柱汞的主要吸收源不是汞的气体逃逸;2)原位水柱降解对二甲基汞的吸收比大气损失更重要;3)北极地区相对较低的汞净产量反映了较低的紫外线水平和冰盖、生产力以及可减少的生物可利用汞。结果将有助于预测甲基汞的生物积累如何被不断变化的气候和不断变化的北极海冰制度所改变。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)
Radon-222 and Radium-226 seawater and ice data from Bering Sea and Chukchi Sea 2021
2021 年白令海和楚科奇海的氡 222 和镭 226 海水和冰数据
- DOI:10.18739/a23x83n3n
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Stephens, Mark
- 通讯作者:Stephens, Mark
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Mark Stephens其他文献
Convergence in European mortgage systems before and after EMU
- DOI:
10.1023/a:1010194725136 - 发表时间:
2000-06-01 - 期刊:
- 影响因子:2.100
- 作者:
Mark Stephens - 通讯作者:
Mark Stephens
Housing finance deregulation: Britain's experience
- DOI:
10.1007/bf02496495 - 发表时间:
1993-06-01 - 期刊:
- 影响因子:2.100
- 作者:
Mark Stephens - 通讯作者:
Mark Stephens
Are Premature Infants with Bronchopulmonary Dysplasia Requiring Tracheostomy and Ventilation at Increased Risk of Atypical Craniosynostosis?
- DOI:
10.1016/j.joms.2024.08.052 - 发表时间:
2024-11-01 - 期刊:
- 影响因子:
- 作者:
Suzanne Martin;Ramon L. Ruiz;Mark Stephens;Elizabeth Todd;Brent Golden;Ryan Jafrani;Samer Elbabaa;Suzanne Martin - 通讯作者:
Suzanne Martin
Evaluation of national disaster management strategy and planning for flood management and impact reduction in Gaborone, Botswana
- DOI:
10.1016/j.ijdrr.2022.102939 - 发表时间:
2022-05-01 - 期刊:
- 影响因子:
- 作者:
Gorata Samuel;Mulalu I. Mulalu;Ditiro B. Moalafhi;Mark Stephens - 通讯作者:
Mark Stephens
Long working hours and self-rated health: Evidence from Beijing, China
长时间工作与健康自评:来自中国北京的证据
- DOI:
10.1016/j.cities.2019.102401 - 发表时间:
2019 - 期刊:
- 影响因子:6.7
- 作者:
Wenjie Wu;Yiyi Chen;Mark Stephens;Ye Liu - 通讯作者:
Ye Liu
Mark Stephens的其他文献
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{{ truncateString('Mark Stephens', 18)}}的其他基金
GEOTRACES GP-17 OCE: Measurement of 7Be as a Tracer of Upper Ocean Processes
GEOTRACES GP-17 OCE:测量 7Be 作为上层海洋过程的示踪剂
- 批准号:
2147723 - 财政年份:2022
- 资助金额:
$ 40.05万 - 项目类别:
Standard Grant
Collaborative Research: Quantifying the atmospheric flux of bio-active trace elements to the southwestern Indian Ocean
合作研究:量化西南印度洋生物活性微量元素的大气通量
- 批准号:
2023011 - 财政年份:2020
- 资助金额:
$ 40.05万 - 项目类别:
Standard Grant
Collaborative Research: Defining the Atmospheric Deposition of Trace Elements into the Arctic Ocean-Ice Ecosystem During the Year-Long MOSAiC Ice Drift.
合作研究:定义在长达一年的 MOSAiC 冰漂过程中微量元素在北冰洋冰生态系统中的大气沉积。
- 批准号:
1753423 - 财政年份:2018
- 资助金额:
$ 40.05万 - 项目类别:
Standard Grant
Collaborative Research: Lead-210 and Polonium-210 as tracers for scavenging and export: GEOTRACES Pacific Meridional Section
合作研究:铅 210 和钋 210 作为清除和出口示踪剂:GEOTRACES 太平洋子午线部分
- 批准号:
1736612 - 财政年份:2017
- 资助金额:
$ 40.05万 - 项目类别:
Continuing Grant
GEOTRACES Pacific Meridional Transect: Measurement of Beryllium-7 as a Tracer of Upper Ocean Processes
GEOTRACES 太平洋经线横断面:测量铍 7 作为上层海洋过程的示踪剂
- 批准号:
1736319 - 财政年份:2017
- 资助金额:
$ 40.05万 - 项目类别:
Standard Grant
SGER: Radiometric Dating of Whalebones: A Method for Studying Succession and Persistence of Whalefall Chemoautotrophic Assemblages
SGER:鲸骨的放射性测年:研究鲸落化学自养组合的连续性和持久性的方法
- 批准号:
9902095 - 财政年份:1999
- 资助金额:
$ 40.05万 - 项目类别:
Standard Grant
Investigation of the Rate of Shelf-Basin Interaction in the Western Arctic Ocean Using Radium Isotopes
利用镭同位素研究北冰洋西部陆架盆地相互作用速率
- 批准号:
9815132 - 财政年份:1999
- 资助金额:
$ 40.05万 - 项目类别:
Standard Grant
SGER: Modeling Heat Exchange between Arctic Leads and Underlying Water Utilizing Be7 Measurements
SGER:利用 Be7 测量对北极铅和底层水之间的热交换进行建模
- 批准号:
9809168 - 财政年份:1998
- 资助金额:
$ 40.05万 - 项目类别:
Standard Grant
Evaluating Heat Exchange Between Arctic Leads and Underlying Water of Adjacent Ice By Be-7 Measurements
通过 Be-7 测量评估北极铅与邻近冰层下水之间的热交换
- 批准号:
9701067 - 财政年份:1997
- 资助金额:
$ 40.05万 - 项目类别:
Continuing Grant
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