Quantification of Past Ocean Dynamics.

过去海洋动力学的量化。

• 批准号: 277128673
• 负责人: Dr. Jörg Lippold
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/277128673?language=en
• 关键词: Quantification; Past; Ocean; Dynamics.

The Atlantic Meridional Overturning Circulation (AMOC) represents a major player in the climate system of our planet by modulating the global transport and storage of salt, heat, nutrients and carbon. In order to provide realistic predictions about the response of Earth’s climate to perturbations, we need a mechanistic understanding of ocean circulation. Modern science has been looking back to the past to assess the behaviour of the oceans under varying boundary conditions. However, incomplete quantitative understanding of the physical and biogeochemical transport mechanisms still hinders models to reliably simulate past and future climate variability. This proposal focuses on quantitatively investigating the AMOC during the ongoing Interglacial, the Holocene (the last ~11,000 years), by applying the kinematic circulation proxy 231Pa/230Th in unprecedented temporal resolution. The Holocene has moved into the focus of (paleo)climatologic research since its boundary conditions are inherently best suitable to examine future evolutions and to estimate threshold behaviours. By comparing model-outputs to the new data sets stability and variability of the AMOC will be assessed, which are highly demanded parameters for climate models.

大西洋经向翻转环流（AMOC）通过调节盐、热、营养物质和碳的全球运输和储存，在我们星球的气候系统中扮演着重要角色。为了提供关于地球气候对扰动的响应的现实预测，我们需要对海洋环流的机械理解。现代科学一直在回顾过去，以评估海洋在不同边界条件下的行为。然而，对物理和地球化学传输机制的不完全定量理解仍然阻碍着模型可靠地模拟过去和未来的气候变率。该建议的重点是定量研究正在进行的间冰期，全新世（最近~11,000年），通过应用运动学环流代理231 Pa/230 Th在前所未有的时间分辨率的AMOC。全新世已经成为（古）气候学研究的焦点，因为它的边界条件本质上是最适合研究未来的演变和估计阈值行为。通过将模式输出与新的数据集进行比较，将评估AMOC的稳定性和变率，这是气候模式高度要求的参数。