Understanding leaf water isotope composition

了解叶子水同位素组成

• 批准号: DP170104276
• 负责人: Prof Margaret Barbour
• 金额: $ 35.25万
• 依托单位: The University of Sydney
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2017
• 资助国家: 澳大利亚
• 起止时间: 2017-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP170104276
• 关键词: Understanding; leaf; water; isotope; composition

This project aims to quantify variation in leaf water isotopes and develop mechanistic models for paleoclimatologists and plant scientists to constrain global carbon cycles. Leaf water stable isotopes influence the isotope compositions of atmospheric oxygen, carbon dioxide and water vapour, and impart an evaporative signal on the isotope composition of plant organic material. These isotope signals have been used to constrain global carbon and water cycles and reconstruct past climates. This project aims to quantify variation in leaf water isotopes and develop mechanistic models for use by paleoclimatologists, plant scientists and to constrain global carbon cycles and develop accurate models of leaf water isotopes to reduce uncertainty in climate models.

该项目旨在量化叶片水同位素的变化，并为古气候学家和植物学家开发机制模型，以限制全球碳循环。叶片水分稳定同位素影响大气中氧、二氧化碳和水蒸气的同位素组成，并对植物有机物质的同位素组成传递蒸发信号。这些同位素信号已被用来限制全球碳和水循环，并重建过去的气候。该项目旨在量化叶片水同位素的变化，开发供古气候学家、植物学家使用的机制模型，并限制全球碳循环，开发精确的叶片水同位素模型，以减少气候模型中的不确定性。