Oxygen-18 in water, carbon dioxide, and organic matter: a tool for linking plant biological processes, hydrology and climate change

水、二氧化碳和有机物中的 Oxygen-18：连接植物生物过程、水文学和气候变化的工具

• 批准号: DP0557394
• 负责人: Prof Graham Farquhar
• 金额: $ 27.75万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2005
• 资助国家: 澳大利亚
• 起止时间: 2005-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0557394
• 关键词: Oxygen; 18; water; carbon; dioxide

The globe is warming but pan evaporation is decreasing, because the world is dimming. We do not understand why. Stable, naturally occurring oxygen isotopes in plants (for example, tree rings) and in the carbon dioxide of the atmosphere vary and record climatic changes and physiological responses. Bringing these disparate areas of research together will help us to interpret the changes and responses. Such information is needed for planning future water requirements in Australia (agriculture, natural ecosystems, dams) and around the world. The isotopic composition of tree rings and of the atmospheric carbon dioxide is affected by that in water of leaves, and the processes linking them will be studied in detail.

地球仪正在变暖，但蒸发皿蒸发量正在减少，因为世界正在变暗。我们不明白为什么。植物（例如树木年轮）和大气中二氧化碳中稳定的天然氧同位素变化并记录气候变化和生理反应。将这些不同的研究领域结合在一起将有助于我们解释这些变化和反应。这些信息对于规划澳大利亚（农业、自然生态系统、水坝）和世界各地未来的水需求是必要的。树木年轮和大气中二氧化碳的同位素组成受树叶水中同位素组成的影响，将详细研究它们之间的联系。