Precise global time scale for the oxidation of Earth's atmosphere between 2.6 and 2.0 billion years ago

2.6 至 20 亿年前地球大气氧化的精确全球时间尺度

• 批准号: DP0344146
• 负责人: Prof Mark Barley
• 金额: $ 24.37万
• 依托单位: The University of Western Australia
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-06-18 至 2006-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0344146
• 关键词: Precise; global; time; scale; oxidation

The rock record from 2600 to 2000 million years ago preserves evidence for dramatically fluctuating greenhouse and icehouse climates at the same time as, and possibly caused by, change from an oxygen-deficient to an oxygen-rich atmosphere. Although the global changes are well-documented, correlation of their timing and duration between continents is poorly constrained. This project aims to redress that problem by producing a precise calibration of the global changes by analysis of the rock records in Australia, Canada and South Africa. It will provide a much needed time framework within which long-term feedback between atmospheric composition and climate can be understood.

从2600到2000百万年前的岩石记录保存了温室和冰室气候剧烈波动的证据，同时，可能是由缺氧到富氧的大气变化引起的。虽然全球变化有很好的记录，但其时间和大陆之间的持续时间的相关性很差。该项目旨在通过分析澳大利亚、加拿大和南非的岩石记录来精确校准全球变化，从而解决这一问题。它将提供一个非常需要的时间框架，在此框架内可以了解大气成分和气候之间的长期反馈。