Calibrating Diatom Oxygen Isotopes for Paleoceanographic Applications Using a Novel Technique

使用新技术校准古海洋学应用的硅藻氧同位素

基本信息

  • 批准号:
    1334686
  • 负责人:
  • 金额:
    $ 39.96万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2013
  • 资助国家:
    美国
  • 起止时间:
    2013-08-01 至 2017-07-31
  • 项目状态:
    已结题

项目摘要

The oxygen isotopic composition (delta18O) of silicate in diatom tests has the potential to deliver key paleoceanographic information, but is underutilized because of the difficulty associated with isolating it for geochemical analysis. This work will refine and apply a new technique ("microfluorination") that has the potential to make d18O in diatoms a more routine measurement. A suite of experiments will be conducted to improve the efficiency of the technique and reduce the sample size required for analysis. The technique will then be applied to cultured marine and freshwater diatoms in order to calibrate the proxy relationship between diatom delta18O and temperature. Finally, diatoms from a sediment trap and boxcore collected in the Guaymas Basin will be analyzed to a) constrain biomineralization depth, b) compare oxygen isotope data between diatoms and foraminifera, and c) assess diagenetic effects on diatom delta18O data. Developing the microfluorination technique and the diatom delta18O-temperature proxy relationship will enable scientists to tap an important, underexploited source of information about ocean-climate dynamics. The project will support a PhD student and provide training opportunities in a state-of-the-art technique for undergraduate students and future post-doctoral researchers in the PI's lab. Project results will be incorporated into graduate coursework. This research will strengthen international ties via collaboration with investigators in the UK and Germany.
硅藻测试中硅酸盐的氧同位素组成(δ 18 O)具有提供关键古海洋学信息的潜力,但由于难以将其分离用于地球化学分析而未得到充分利用。这项工作将完善和应用一种新技术(“微生物学”),有可能使硅藻中的d18 O成为一种更常规的测量方法。将进行一系列实验,以提高该技术的效率,减少分析所需的样本量。然后,该技术将被应用到培养的海洋和淡水硅藻,以校准硅藻δ 18 O和温度之间的替代关系。最后,将分析从瓜伊马斯盆地收集的沉积物捕集器和盒式岩芯中的硅藻,以a)限制生物矿化深度,B)比较硅藻和有孔虫之间的氧同位素数据,以及c)评估成岩作用对硅藻δ 18 O数据的影响。发展微生物学技术和硅藻δ 18 O-温度替代关系将使科学家能够利用一个重要的、未充分利用的海洋气候动态信息来源。该项目将支持博士生,并为PI实验室的本科生和未来的博士后研究人员提供最先进技术的培训机会。项目成果将纳入研究生课程。这项研究将通过与英国和德国的研究人员合作加强国际联系。

项目成果

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Howard Spero其他文献

Howard Spero的其他文献

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{{ truncateString('Howard Spero', 18)}}的其他基金

SCOR Workshop: The Biology and Biogeochemistry of Planktonic Foraminifera
SCOR 研讨会:浮游有孔虫的生物学和生物地球化学
  • 批准号:
    1540666
  • 财政年份:
    2015
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Standard Grant
Collaborative Research: Evolution of Arctic Water Column Hydrography during the Holocene Based on a Novel Instrumentation Combination
合作研究:基于新型仪器组合的全新世北极水柱水文演化
  • 批准号:
    1501526
  • 财政年份:
    2015
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Standard Grant
Quantifying the 18O/16O of Glacial Meltwater Pulses Using a Novel LA-ICPMS/IRMS Multiproxy Approach
使用新型 LA-ICPMS/IRMS 多代理方法量化冰川融水脉冲的 18O/16O
  • 批准号:
    1061676
  • 财政年份:
    2011
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Standard Grant
Collaborative Research: CDI-Type II: 4 Dimensional Visualization of Past Ocean Circulation from Paleoceanographic Data
合作研究:CDI-Type II:根据古海洋数据对过去海洋环流进行 4 维可视化
  • 批准号:
    1125422
  • 财政年份:
    2011
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Standard Grant
Acquisition of an Excimer Laser, Quadrupole ICPMS and Microsampler for UC Davis
为加州大学戴维斯分校采购准分子激光器、四极杆 ICPMS 和微量采样器
  • 批准号:
    0946297
  • 财政年份:
    2010
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Standard Grant
Accomplishment Based Renewal: Experimental Verification of Stable Isotope and Trace Metal Incorporation in Living Planktonic Foraminifera
基于成就的更新:活体浮游有孔虫中稳定同位素和微量金属掺入的实验验证
  • 批准号:
    0550703
  • 财政年份:
    2007
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Continuing Grant
Using Mg-Paleotheromometry to Deconvolute the Marine Oxygen Isotope Record
使用 Mg-古测温法对海洋氧同位素记录进行解卷积
  • 批准号:
    9903632
  • 财政年份:
    1999
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Standard Grant
Experimental Verification of Stable Isotope and Trace Metal Incorporation in Living Planktonic Foraminifera
活体浮游有孔虫中稳定同位素和微量金属掺入的实验验证
  • 批准号:
    9729203
  • 财政年份:
    1998
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Continuing Grant
SGER: Field Verification of a Carbonate Ion Effect on the Carbon Isotopic Composition of Planktonic Foraminifera
SGER:碳酸盐离子对浮游有孔虫碳同位素组成影响的现场验证
  • 批准号:
    9726821
  • 财政年份:
    1997
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Standard Grant
Effects of Seawater Carbonate Chemistry on the Stable Isotope Geochemistry of Cultured Benthic Foraminifera
海水碳酸盐化学对养殖底栖有孔虫稳定同位素地球化学的影响
  • 批准号:
    9633486
  • 财政年份:
    1996
  • 资助金额:
    $ 39.96万
  • 项目类别:
    Continuing Grant

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META-DDA:硅藻-固氮菌协会的代谢活动
  • 批准号:
    2227425
  • 财政年份:
    2023
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沿海硅藻骨条休眠细胞的定量认识:硅藻赤潮从苏醒到休眠
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    23K14008
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    2023
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硅藻模型温度、CO2 和硝酸盐相互作用景观的实证测定
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    NE/X001237/1
  • 财政年份:
    2023
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Marine Diatom-Parasite Relationships in Upwelling Systems
上升流系统中的海洋硅藻与寄生虫的关系
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