Development and application of geochemical tracers for paleo and modern oceanography

古和现代海洋地球化学示踪剂的开发与应用

• 批准号: 312376-2007
• 负责人: François, Roger
• 金额: $ 2.26万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=396791
• 关键词: Development; application; geochemical; tracers; paleo

The rise in anthropogenic CO2 may alter future climate and we must improve our predictive capabilities to decide on optimal societal responses. The ocean plays a critical role in regulating Earth's climate by controlling atmospheric CO2 and by redistributing incoming solar heat. The distribution of two natural radioisotopes (230Th and 231Pa) in seawater provides important information on particle dynamics, carbon fluxes and deep-water circulation in the modern ocean, which can be used to better quantify oceanic processes important for climate change. In addition, the incorporation of these isotopes in the sedimentary record provides a means of assessing the temporal evolution of these oceanic processes in relation to past climate changes and provides the needed temporal context to distinguish between climatic trends induced by anthropogenic activities and recurring natural cycles.

人为二氧化碳的增加可能会改变未来的气候，我们必须提高我们的预测能力，以决定最佳的社会反应。海洋通过控制大气二氧化碳和重新分布传入的太阳热来调节地球气候至关重要。海水中两个天然放射性同位素（230th和231pa）的分布提供了有关现代海洋中粒子动态，碳通量和深水循环的重要信息，可用于更好地量化对气候变化重要的海洋过程。此外，这些同位素在沉积记录中的融合提供了一种评估与过去气候变化有关的海洋过程的时间演变的方法，并提供了所需的时间环境，以区分人类活动活动引起的气候趋势和反复出现的自然周期。