Arctic Ocean redox history and Hg cycling using redox-sensitive trace metals and Hg isotopes: the influence of sea ice

使用氧化还原敏感的痕量金属和汞同位素的北冰洋氧化还原历史和汞循环:海冰的影响

基本信息

项目摘要

This award is funded under the American Recovery and Reinvestment Act of 2009(Public Law 111-5).The investigators will measure mercury (Hg) concentrations, mercury isotopes, and a suite of trace metals in previously-collected Arctic sediment cores in order to increase understanding of paleoceanographic conditions in the Arctic Ocean as well as overall understanding of mercury cycling, particularly prior to the interference of humans with the mercury cycle. The abundance and isotopic composition of mercury in Arctic sediments may be sensitive to (and thus record changes in) such processes as sea ice cover, biological productivity, and changing sources of mercury. Questions that can be addressed over the course of this research include:1)What is the Hg isotopic composition of the Pleistocene-Holocene Arctic Ocean?2)Can Hg isotopes be used to infer different Hg sources to the Arctic Ocean?3)Can Hg isotopes be used to quantify extent of sea ice growth and retreat in the Pleistocene-Holocene Arctic? That is, can Hg isotopes by used as a proxy for sea ice?4)Is the Hg isotopic system sensitive to changes in organic productivity during shifts in Arctic climate and ice volume?5)Can Hg isotopic investigations of the ancient record help predict changes in the Hg cycle during an ice-free (summer) Arctic environment of the future?6)Can knowledge gained by studying Hg isotopes in the unique environment of the Arctic be applied globally to ocean productivity and circulation studies?This work has potential impacts in understanding the geochemical cycling of mercury, an important neurotoxin. It also promises to improve our ability to decipher Arctic paleoclimate. One graduate student and three undergraduate research interns would be supported by the proposed research.
该奖项是根据2009年美国复苏和再投资法案资助的(公法111-5)。调查人员将测量汞(Hg)浓度、汞同位素和先前收集的北极沉积物岩心中的一系列痕量金属,以增加对北冰洋古海洋学条件的了解,以及对汞循环的全面了解,特别是在人类干预汞循环之前。北极沉积物中汞的丰度和同位素组成可能对海冰覆盖、生物生产力和汞来源的变化等过程敏感(从而记录变化)。在研究过程中可以解决的问题包括:1)更新世-全新世北冰洋的汞同位素组成是什么?2)汞同位素能否用于推断北冰洋汞的不同来源?3)汞同位素能否用于量化更新世-全新世北极海冰增长和消退的程度?也就是说,汞同位素可以作为海冰的替代物吗?4)汞同位素系统对北极气候和冰量变化期间有机生产力的变化是否敏感?5)汞同位素调查的古代记录,可以帮助预测汞循环的变化,在无冰(夏季)北极环境的未来?6)通过研究北极独特环境中汞同位素获得的知识能否在全球范围内应用于海洋生产力和环流研究?这项工作对理解汞的地球化学循环具有潜在的影响,汞是一种重要的神经毒素。它还有望提高我们破译北极古气候的能力。一名研究生和三名本科生研究实习生将得到拟议研究的支持。

项目成果

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James Gleason其他文献

INVASIVE PULMONARY ASPERGILLOSIS SUPERINFECTION IN A CRITICALLY ILL PATIENT WITH INFLUENZA A AND LIMITED CORTICOSTEROID EXPOSURE
  • DOI:
    10.1016/j.chest.2019.08.664
  • 发表时间:
    2019-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Shawn Marein;Avneek Singh Sandhu;Aleksandra Kozlova;Median Ali;James Gleason
  • 通讯作者:
    James Gleason
OSA AND PH: CORRELATIONS BETWEEN THE PATHOPHYSIOLOGICAL VARIABLES ON POLYSOMNOGRAM AND RIGHT HEART CATHETERIZATION FINDINGS
  • DOI:
    10.1016/j.chest.2018.08.1086
  • 发表时间:
    2018-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Jodi-Ann Chin;Norma Barton;James Gleason;Franck Rahaghi;Anas Hadeh
  • 通讯作者:
    Anas Hadeh
Calibration of the SNPP and NOAA 20 VIIRS sensors for continuity of the MODIS climate data records
  • DOI:
    10.1016/j.rse.2023.113717
  • 发表时间:
    2023-09-01
  • 期刊:
  • 影响因子:
  • 作者:
    Alexei Lyapustin;Yujie Wang;Myungje Choi;Xiaoxiong Xiong;Amit Angal;Aisheng Wu;David R. Doelling;Rajendra Bhatt;Sujung Go;Sergey Korkin;Bryan Franz;Gerhardt Meister;Andrew M. Sayer;Miguel Roman;Robert E. Holz;Kerry Meyer;James Gleason;Robert Levy
  • 通讯作者:
    Robert Levy
Insight into climate and hydrology of the late cretaceous western interior basin from clumped isotope Paleothermometry and strontium isotopes
从团簇同位素古温度测量和锶同位素看晚白垩世西部内陆盆地的气候和水文洞察
  • DOI:
    10.1016/j.epsl.2024.119180
  • 发表时间:
    2025-02-01
  • 期刊:
  • 影响因子:
    5.100
  • 作者:
    Allison N. Curley;Sierra V. Petersen;Henry Fricke;James Gleason
  • 通讯作者:
    James Gleason
SARCOIDOSIS INDUCED BY IMMUNE RECONSTITUTION INFLAMMATORY SYNDROME IN A PATIENT WITH HIV/AIDS
  • DOI:
    10.1016/j.chest.2020.08.1435
  • 发表时间:
    2020-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Tony Kamel;James Gleason;Natallia Maroz
  • 通讯作者:
    Natallia Maroz

James Gleason的其他文献

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{{ truncateString('James Gleason', 18)}}的其他基金

NSF GEO-NERC: Collaborative Research: Impact of the Plio-Pleistocene Transition on Provenance and Sediment Routing from the Himalaya to the Deep-Sea Bengal Fan
NSF GEO-NERC:合作研究:上里奥-更新世转变对从喜马拉雅山到深海孟加拉扇的物源和沉积物路径的影响
  • 批准号:
    2026826
  • 财政年份:
    2020
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Standard Grant
ELT COLLABORATIVE RESEARCH: Investigating the Biotic and Paleoclimatic Consequences of Dust in the Late Paleozoic
ELT 合作研究:调查晚古生代尘埃的生物和古气候后果
  • 批准号:
    1337440
  • 财政年份:
    2013
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Continuing Grant

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High-resolution sulfur isotope analysis for reconstructing the perturbation of ocean redox condition during glacial-interglacial cycle
高分辨率硫同位素分析重建冰期-间冰期循环期间海洋氧化还原条件的扰动
  • 批准号:
    21H01203
  • 财政年份:
    2021
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Collaborative Research: Using Ca, Sr, Mg, and Fe isotope proxies to constrain redox and continental weathering during Ocean Anoxic Event 2
合作研究:使用 Ca、Sr、Mg 和 Fe 同位素代理来抑制海洋缺氧事件 2 期间的氧化还原和大陆风化
  • 批准号:
    2124802
  • 财政年份:
    2021
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Standard Grant
Collaborative Research: Using Ca, Sr, Mg, and Fe isotope proxies to constrain redox and continental weathering during Ocean Anoxic Event 2
合作研究:使用 Ca、Sr、Mg 和 Fe 同位素代理来抑制海洋缺氧事件 2 期间的氧化还原和大陆风化
  • 批准号:
    1933298
  • 财政年份:
    2020
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Standard Grant
Collaborative Research: Using Ca, Sr, Mg, and Fe isotope proxies to constrain redox and continental weathering during Ocean Anoxic Event 2
合作研究:使用 Ca、Sr、Mg 和 Fe 同位素代理来抑制海洋缺氧事件 2 期间的氧化还原和大陆风化
  • 批准号:
    1933302
  • 财政年份:
    2020
  • 资助金额:
    $ 19.2万
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    Standard Grant
Interrogating the role played by ocean-redox change as a driver of mass extinction using U isotopes
使用U同位素探究海洋氧化还原变化在大规模灭绝驱动因素中所扮演的角色
  • 批准号:
    542016-2019
  • 财政年份:
    2019
  • 资助金额:
    $ 19.2万
  • 项目类别:
    University Undergraduate Student Research Awards
Collaborative Research: Tracking Middle-late Paleozoic Global-ocean Redox Conditions Using U Isotopes in Marine Carbonates
合作研究:利用海洋碳酸盐中的U同位素追踪中晚古生代全球海洋氧化还原条件
  • 批准号:
    1733641
  • 财政年份:
    2017
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Standard Grant
Collaborative Research: Tracking Middle-late Paleozoic Global-ocean Redox Conditions Using U Isotopes in Marine Carbonates
合作研究:利用海洋碳酸盐中的U同位素追踪中晚古生代全球海洋氧化还原条件
  • 批准号:
    1733977
  • 财政年份:
    2017
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Standard Grant
Collaborative Research: Tracking middle-late Paleozoic global-ocean redox conditions using uranium isotopes in marine marbonates
合作研究:利用海洋大理石酸盐中的铀同位素追踪中晚古生代全球海洋氧化还原条件
  • 批准号:
    1733991
  • 财政年份:
    2017
  • 资助金额:
    $ 19.2万
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    Standard Grant
Collaborative Research: Tracking Middle-late Paleozoic Global-ocean Redox Conditions Using U Isotopes in Marine Carbonates
合作研究:利用海洋碳酸盐中的U同位素追踪中晚古生代全球海洋氧化还原条件
  • 批准号:
    1733598
  • 财政年份:
    2017
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Standard Grant
EAR-PF Determining links between magma redox heterogeneity in ocean island basalts and near-surface processes of the ancient and present day
EAR-PF 确定海岛玄武岩中岩浆氧化还原异质性与古代和现代近地表过程之间的联系
  • 批准号:
    1625017
  • 财政年份:
    2016
  • 资助金额:
    $ 19.2万
  • 项目类别:
    Fellowship Award
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