The Influence of Atmosphere-Biology-Geologyduring the Great Oxidation Event

大氧化事件期间大气-生物-地质的影响

• 批准号: 276727921
• 负责人: Dr. John Lee Grenfell
• 金额: --
• 依托单位: Standort Berlin-Adlershof
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/276727921?language=en
• 关键词: Influence; Atmosphere; Biology; Geologyduring; Great

The Great Oxidation Event (GOE) marked a spectacular rise of molecular oxygen (O2) in the history of the Earth. The GOE enabled wide-ranging habitability and allowing complex life to take hold of the planet. Many questions however still remain open. What drove oxygen to flood the atmosphere, the timing and the extent of the event - are all not well-established. Subtle interplays within the atmosphere-biology-geology system are only now starting to be identified. The resulting demise in methanogens and the spiral towards a so-called Snowball Earth state illustrate the alarming extremity of the GOE. A central question we investigate is whether the GOE occurred linearly or in jumps (the so-called yo-yo model) due to a proposed oxygen bistability and examine the effect of the carbon cycle and atmospheric climate upon the nature and timing of the GOE. We also apply our experience in combining one- and three-dimensional modelling expertise to investigate the role of uncertainties in atmospheric climate during the GOE. To achieve this we develop and apply our unique atmospheric model with its detailed oxygen cycle components (e.g. burial, weathering, photochemistry) from the atmosphere, biosphere and geosphere. A central goal is to investigate scenarios constrained with recent marked advances in geological data (e.g. for surface pressure, atmospheric greenhouse gases etc.) to investigate the interplay of key processes which drove the GOE.

大氧化事件（GOE）标志着地球历史上分子氧（O2）的惊人增长。GOE使广泛的可居住性成为可能，并允许复杂的生命占据地球。然而，许多问题仍然悬而未决。是什么驱使氧气充斥大气层，事件的时间和程度-都没有得到很好的确定。大气-生物-地质系统中微妙的相互作用现在才开始被发现。由此导致的产甲烷菌的消亡和向所谓的雪球地球状态的螺旋式上升说明了GOE令人担忧的极端。我们调查的一个中心问题是GOE是否发生线性或跳跃（所谓的溜溜球模型），由于建议的氧双稳态和研究的影响，碳循环和大气气候的性质和时间的GOE。我们还运用我们在结合一维和三维建模专业知识方面的经验，研究GOE期间大气气候中不确定性的作用。为了实现这一目标，我们开发并应用了独特的大气模型，其中包含来自大气层、生物圈和地圈的详细氧循环成分（例如埋藏、风化、光化学）。一个中心目标是调查受地质数据最近显著进展（例如地表压力、大气温室气体等）限制的情景。调查推动GOE的关键过程的相互作用。