Climate, Energy and Carbon in Ancient Earth Systems

古代地球系统中的气候、能源和碳

• 批准号: EP/X023214/1
• 负责人: Richard Pancost
• 金额: $ 341.15万
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX023214%2F1
• 关键词: Climate; Energy; Carbon; Ancient; Earth

CERES will integrate analytical innovation, biogeochemistry in modern contexts, and geological archives to holistically evaluate howclimate change affects peatland carbon cycling across multiple timescales. Greenhouse gases shaped Earth history, impacting bothclimate and ecosystems; ongoing anthropogenic emissions are doing the same. These include impacts on the microbially mediatedprocesses that govern the chemical state of our planet and act as climate feedbacks. Soil microorganisms, for example, account forthe largest natural methane flux, and yet these processes remain poorly understood, mediated by multiple environmental factors.Insight can be derived from geological archives that document the timescale-dependent responses of biogeochemical systems toenvironmental perturbations. Such studies on peat and lignites provide tantalising insights into climate-driven disruption of thecarbon cycle, but the underlying mechanisms remain unresolved. This critical knowledge gap arises from our inability to determinethe isotopic signatures of the most diagnostic biomarkers. Therefore, we will:1) Develop new instrumentation for the isotopic determination of large bacterial and archaeal biomolecules. This is a transformativeexpansion of our biomarker toolkit as our analytical window expands from low to highly diagnostic compounds.2) Apply these new methods to modern peatlands, examining biomarker isotopic compositions in the field as well as in experimentsin response to manipulation of pH, temperature and substrate.3) Apply our new biomarker methods and understanding to the geological past. Working across decadal to multi-million yeartimescales, we will unlock the mechanistic controls underlying ancient reorganisations of wetland carbon cycling.Through these WPs, CERES will probe how microbial metabolism, and hence biogeochemical cycles, operate(d) on the Earth today,through its history, and in response to rapid global warming.

CERES将整合分析创新、现代背景下的生物地球化学和地质档案，全面评估气候变化如何影响多个时间尺度的泥炭地碳循环。温室气体塑造了地球历史，影响了气候和生态系统；持续的人为排放也在做同样的事情。其中包括对微生物介导过程的影响，这些过程控制着我们星球的化学状态，并起到气候反馈的作用。例如，土壤微生物占最大的天然甲烷通量，但这些过程受到多种环境因素的调节，人们对其了解甚少。洞察可以从记录生物地球化学系统对环境扰动的时标响应的地质档案中得到。对泥炭和褐煤的研究为气候驱动的碳循环破坏提供了诱人的见解，但潜在的机制仍未解决。这一关键的知识鸿沟源于我们无法确定大多数诊断性生物标志物的同位素特征。因此，我们将：1)开发用于大型细菌和古细菌生物分子同位素测定的新仪器。随着我们的分析窗口从低诊断性化合物扩展到高诊断性化合物，这是我们生物标志物工具箱的一次变革性扩展。2)将这些新方法应用于现代泥炭地，在野外和实验中检测生物标志物同位素组成对pH、温度和底物操纵的响应。3)将我们新的生物标志物方法和认识应用于地质历史。从十年到数百万年的时间尺度上，我们将解开湿地碳循环古代重组的机制控制。通过这些WPs， CERES将探索微生物代谢，从而生物地球化学循环，如何在今天的地球上运行，通过它的历史，并应对快速的全球变暖。