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| Pyrite: a deep-time capsule of ocean chemistry and atmosphere oxidation | |
| 项目编号 | DP150102578 |
| Ross Large | |
| 项目主持机构 | University of Tasmania |
| 开始日期 | 2015 |
| 结束日期 | 2018-06-30 |
| 英文摘要 | 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. |
| 学科分类 | 0802 - 地质学;08 - 地球科学 |
| 资助机构 | AU-ARC |
| 项目经费 | 481100 |
| 国家 | AU |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/74385 |
| 推荐引用方式 GB/T 7714 | Ross Large.Pyrite: a deep-time capsule of ocean chemistry and atmosphere oxidation.2015. |
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