Collaborative Research: Studying Carbon Injection and the Silicate Weathering Feedback over the Paleocene Eocene Thermal Maximum Using Ca Isotopes and Modeling

合作研究:利用 Ca 同位素和模拟研究古新世始新世热最大值期间的碳注入和硅酸盐风化反馈

基本信息

  • 批准号:
    2233962
  • 负责人:
  • 金额:
    $ 5.61万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-05-01 至 2026-04-30
  • 项目状态:
    未结题

项目摘要

The Paleocene-Eocene Thermal Maximum (PETM) was a strong warming event that took place 55 million years ago. The PETM was driven by a large addition of carbon dioxide to the ocean and atmosphere at that time. This project will quantify the PETM carbon dioxide addition and document the response of the Earth’s carbon cycle to that addition. The study will explore how the Earth system responds to climatic perturbations, including the rates and mechanisms of that response. Events in the geologic record show the climatic, hydrological, and geochemical evolution of the Earth in response to rapid warming. Thus, this study will provide a valuable comparison with modern climate change and future climate. The project broader impacts include support for a graduate student and undergraduate researchers. The project will also create YouTube video content for use in undergraduate courses.This study will utilize Ca isotopes as recorders of the temporal evolution of bottom water calcite saturation state over the recovery interval of the PETM, an interval that has received less attention in comparison to the onset and ocean acidification phases. Understanding the dynamics of the recovery interval is critical because this is the time during which the silicate weathering response to climatic warming is expressed, primarily as an alkalinity 'overshoot'. This interval is a favorable focus for study because it is more likely than the interval of intense carbonate dissolution to be recorded, and preserved, in marine sediments. Complementary numerical modeling approaches – reactive transport (RTM) and intermediate complexity Earth System (cGENIE) modeling – and existing reconstructions of oceanic dissolved inorganic carbon (DIC) will be used to elucidate (i) the amount of C input to the ocean-atmosphere system, and (ii) the silicate weathering response. A significant advantage of this approach is that the interpretive framework is not impacted by the rate of carbon injection (i.e., for the most likely injection time scales 10 ka), removing a significant uncertainty in reconstructing the mass of carbon injection. The rate at which the Earth System recovers from hyperthermals depends critically on the rate at which the silicate weathering feedback operates and the strength of the feedback. Despite the significance of this knowledge, there are few constraints available to minimize uncertainties.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.
古新世-始新世极热期(PETM)是发生在5500万年前的一次强烈变暖事件。PETM是由当时海洋和大气中大量二氧化碳的增加所驱动的。这个项目将量化PETM二氧化碳的增加,并记录地球碳循环对增加的反应。这项研究将探讨地球系统如何对气候扰动作出反应,包括这种反应的速率和机制。地质记录中的事件显示了地球对快速变暖的气候、水文和地球化学演变。因此,这项研究将为现代气候变化和未来气候变化提供有价值的比较。该项目更广泛的影响包括对研究生和本科生研究人员的支持。该项目还将为本科课程制作YouTube视频内容。本研究将利用Ca同位素作为始新世(PETM)恢复期(与海洋酸化开始阶段和酸化阶段相比,这一恢复期受到的关注较少)底水方解石饱和状态的时间演化记录。了解恢复间隔的动态是至关重要的,因为这是硅酸盐风化对气候变暖反应的时间,主要表现为碱度“超调”。这是一个有利的研究重点,因为它比强烈的碳酸盐溶解层更有可能被记录和保存在海洋沉积物中。互补的数值模拟方法——反应输移(RTM)和中等复杂性地球系统(cGENIE)模型——以及海洋溶解无机碳(DIC)的现有重建将用于阐明(i)向海洋-大气系统输入的碳量,以及(ii)硅酸盐风化响应。这种方法的一个显著优点是解释框架不受注碳速率的影响(即,对于最有可能的注入时间尺度为10 ka),从而消除了重建注碳质量的重大不确定性。地球系统从超热环境中恢复的速率主要取决于硅酸盐风化反馈作用的速率和反馈作用的强度。尽管这方面的知识很重要,但很少有限制来减少不确定性。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

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Sandra Turner其他文献

Resilience and Social Work Practice: Three Case Studies
复原力和社会工作实践:三个案例研究
  • DOI:
  • 发表时间:
    2001
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Sandra Turner
  • 通讯作者:
    Sandra Turner
An Expert Review on the Combination of Relugolix With Definitive Radiation Therapy for Prostate Cancer
  • DOI:
    10.1016/j.ijrobp.2021.12.005
  • 发表时间:
    2022-06-01
  • 期刊:
  • 影响因子:
    6.500
  • 作者:
    Soumyajit Roy;Nicholas G. Zaorsky;Hilary P. Bagshaw;Alejandro Berlin;Alison Tree;Sandra Turner;Bridget Koontz;Paul Nguyen;Ronald Chen;Robert T. Dess;William C. Jackson;Amar U. Kishan;Bradley Stish;Himanshu Nagar;Edwin Posadas;Phuoc T. Tran;Abhishek Solanki;Neal D. Shore;Gordon Guo;Lee Ponsky;Daniel E. Spratt
  • 通讯作者:
    Daniel E. Spratt
1490 THE INFLUENCE OF TESTOSTERONE SUPPRESSION AND RECOVERY ON SEXUAL FUNCTION IN MEN WITH PROSTATE CANCER OBSERVATIONS FROM A PROSPECTIVE STUDY IN MEN UNDERGOING INTERMITTENT ANDROGEN SUPPRESSION
  • DOI:
    10.1016/j.juro.2012.02.2012
  • 发表时间:
    2012-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Evan Ng;Henry Woo;Sandra Turner;Eugene Leong;Melanie Jackson;Nigel Spry
  • 通讯作者:
    Nigel Spry
Adolescent Latinas’ Adaptive Functioning and Sense of Well-Being
拉丁裔青少年的适应性功能和幸福感
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Sandra Turner;C. Kaplan;L. Badger
  • 通讯作者:
    L. Badger
1529 Customised training during war: Ukraine takes new approach to develop knowledge and skills.
战争期间的定制化培训:乌克兰采用新方法来发展知识和技能。
  • DOI:
    10.1016/s0167-8140(25)00512-2
  • 发表时间:
    2025-05-01
  • 期刊:
  • 影响因子:
    5.300
  • 作者:
    Lesia Mytsak;Serhii Mykhailiuk;Simon Downes;David Stewart;Sandra Turner;Philippe Fortier;Natalka Suchowerska
  • 通讯作者:
    Natalka Suchowerska

Sandra Turner的其他文献

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{{ truncateString('Sandra Turner', 18)}}的其他基金

Linking terrestrial and marine carbon cycling across the Paleocene-Eocene Thermal Maximum via intermediate complexity Earth system modeling
通过中等复杂度的地球系统建模将古新世-始新世热最大值期间的陆地和海洋碳循环联系起来
  • 批准号:
    2202694
  • 财政年份:
    2022
  • 资助金额:
    $ 5.61万
  • 项目类别:
    Standard Grant
Collaborative Research: NSFGEO-NERC: C-FORCE Carbon-Cycle Feedbacks from Response to Carbon Emissions
合作研究:NSFGEO-NERC:碳排放响应的 C-FORCE 碳循环反馈
  • 批准号:
    2244897
  • 财政年份:
    2022
  • 资助金额:
    $ 5.61万
  • 项目类别:
    Standard Grant
IRFP: GENIE Modeling of Paleogene Hyperthermals
IRFP:古近纪高温的 GENIE 模型
  • 批准号:
    1159100
  • 财政年份:
    2013
  • 资助金额:
    $ 5.61万
  • 项目类别:
    Fellowship Award

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  • 项目类别:
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合作研究:研究多重分类响应的新回归模型和方法
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Collaborative Research: Studying Carbon Injection and the Silicate Weathering Feedback over the Paleocene Eocene Thermal Maximum Using Ca Isotopes and Modeling
合作研究:利用 Ca 同位素和模拟研究古新世始新世热最大值期间的碳注入和硅酸盐风化反馈
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