Collaborative Research: EAR Climate - Pairing calcium and clumped isotopes to inform carbon cycle and climate dynamics at the onset of the Late Paleozoic Ice Age

合作研究：EAR 气候 - 将钙和聚集同位素配对，以了解晚古生代冰河时代开始时的碳循环和气候动态

• 批准号: 2221962
• 负责人: Matthew Saltzman
• 金额: $ 29.3万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2221962&HistoricalAwards=false
• 关键词: Collaborative; Research; EAR; Climate; Pairing

Past climates are relevant to understanding how sensitive the Earth system is to rising greenhouse gas levels like carbon dioxide. The Late Paleozoic Ice Age from 350 to 290 million years ago was the longest-lived glaciated period of the past half-billion years and represents an important opportunity to study the coupling between Earth’s climate and the global carbon cycle. Although the challenge in deep time studies is the need to rely on ‘proxies’ for climate rather than direct measurements, recent advances provide new opportunities to understand the full range of natural variability in the climate system that informs our future. This project will develop novel isotope proxies to understand the role of land plant evolution on organic carbon burial, atmospheric carbon dioxide, and temperature at the beginning of the Late Paleozoic Ice Age. Benefits will include training of early career scientists, including those from under-represented groups, and developing hands-on demonstrations aimed at improving student understanding of the delicate balance between carbon inputs and outputs to Earth’s atmosphere. The proposed research on the Late Paleozoic Ice Age will investigate important questions that have hindered progress towards understanding the relationship between global carbon cycling and climate: 1) diagenetic influences on stable carbon isotopes in shallow water carbonates that are used as a proxy for carbon cycling and 2) the role of temperature versus ice volume in marine oxygen isotope records. To test hypotheses of diagenesis versus global carbon cycling and temperature versus ice volume, this research will utilize the novel calcium and clumped isotope systems. Calcium has the advantage of providing insight on the impact of diagenesis on measured carbon isotopes whereas clumped isotopes record temperature but are unaffected by mineralogy, precipitation rate, or the isotopic evolution of seawater. Calcium and clumped isotopes may transform our understanding of Earth history and this study will benefit research approaches over a range of spatial and temporal scales.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.

过去的气候与理解地球系统对提高二氧化碳等温室气体水平的敏感程度有关。古生代晚期从350到2.9亿年前的冰河时代是过去五十亿年的冰川时期最长的冰川时期，这是研究地球气候与全球碳循环之间耦合的重要机会。尽管深度研究的挑战是需要依靠“代理”进行攀登而不是直接测量，但最近的进步为了解气候系统中自然变异性的全部范围提供了新的机会，从而为我们的未来提供了信息。该项目将开发新型的同位素代理，以了解土地植物进化对有机碳墓葬，大气二氧化碳和温度开始时的作用。福利将包括对早期职业科学家的培训，包括来自代表性不足的群体的培训，以及旨在提高学生对碳输入和对地球大气的产出之间微妙平衡的动手示威的培训。关于古生物学晚期冰河时期的拟议研究将研究重要的问题，这些问题妨碍了了解全球碳循环和攀岩之间的关系：1）对浅水碳酸盐中稳定的碳同位素的影响，这些碳酸盐碳酸盐用作碳循环的代理和2）温度与冰量的作用。为了测试成岩作用与全球碳循环和温度与冰量的假设，这项研究将利用新型的钙和聚类的同位素系统。钙具有提供成岩作用对测得的碳同位素的影响的优势，而聚类的同位素记录温度，但不受矿物学，降水速率或海水的同位素进化的影响。钙和聚类的同位素可能会改变我们对地球历史的理解，这项研究将使研究方法在一系列空间和临时尺度上受益。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛影响的审查标准通过评估来通过评估来支持的。

项目成果

EARLY MISSISSIPPIAN CALCIUM ISOTOPE STRATIGRAPHY AND IMPLICATIONS FOR CONDITIONS OF CARBONATE DEPOSITION

密西西比早期钙同位素地层及其对碳酸盐沉积条件的影响

• DOI: 10.1130/abs/2022nc-374971
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Haber, Peter;Saltzman, Matthew;Griffith, Elizabeth M.;Adiatma, Yoseph
• 通讯作者: Adiatma, Yoseph

THE APPLICATION OF CALCIUM ISOTOPES TO UNDERSTAND THE EFFECTS OF DIAGENESIS ON CARBON ISOTOPE TRENDS IN ANCIENT CARBONATES: AN EXAMPLE FROM THE EARLY MISSISSIPPIAN

应用钙同位素了解成岩作用对古碳酸盐岩中碳同位素趋势的影响：以早期密西西比期为例

• DOI: 10.1130/abs/2022am-380109
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Haber, Peter;Saltzman, Matthew;Griffith, Elizabeth M.;Adiatma, Yoseph;Bergmann, Kristin D.;Anderson, Noah T.
• 通讯作者: Anderson, Noah T.