Isotope discrimination and Lagrangian analysis for process-based ecosystem modelling

基于过程的生态系统建模的同位素辨别和拉格朗日分析

• 批准号: 351040-2007
• 负责人: Warland, Jon
• 金额: $ 7.33万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=364654
• 关键词: Isotope; discrimination; Lagrangian; analysis; process

The consumption and release of carbon through photosynthesis and respiration are major ecosystem functions. Together, these processes are called the carbon cycle. The terrestrial carbon cycle is a significant determinant of the amount of CO2 in the atmosphere. A quantitative analysis of the carbon cycle is also an important means of clarifying how an ecosystem is functioning and how it is changing. Photosynthesis discriminates against the stable isotope of carbon, C13. In addition, the amount of C13 in the atmosphere is changing due to foosil fuel consumption. Because of these two facts, measurements of the carbon cycle in ecosystems combined with measurements of the isotope ratio of its components is capable of providing much information about ecosystem function, and will allow us to develop improved models of ecosystem processes in order to predict the future health of both natural and agricultural systems. This project will provide detailed information about carbon cycles in a forest and in an agricultural system based on recent advances in micrometeorological measurement techniques.

通过光合作用和呼吸作用消耗和释放碳是主要的生态系统功能。这些过程统称为碳循环。陆地碳循环是大气中二氧化碳含量的重要决定因素。碳循环的定量分析也是阐明生态系统如何运作和如何变化的重要手段。光合作用区别于碳的稳定同位素C13。此外，由于化石燃料的消耗，大气中C13的含量正在发生变化。由于这两个事实，对生态系统中碳循环的测量与对其组成部分同位素比率的测量相结合，能够提供有关生态系统功能的大量信息，并将使我们能够开发改进的生态系统过程模型，以便预测自然和农业系统的未来健康状况。该项目将根据微气象测量技术的最新进展，提供有关森林和农业系统中碳循环的详细信息。