Quantification of Past Ocean Dynamics.

大西洋子午线翻转环流(AMOC)通过调节全球盐分、热量、营养物质和碳的运输和储存，代表着地球气候系统中的一个主要参与者。为了提供关于地球气候对扰动的反应的现实预测，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，对物理和生物地球化学传输机制的不完全的定量了解仍然阻碍了模型可靠地模拟过去和未来的气候变异性。这项建议的重点是定量研究正在进行的间冰期，全新世(最后~11000年)，通过应用运动环流代理231PA/230TH以前所未有的时间分辨率。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身最适合检查未来的演化和估计阈值行为。通过将模型输出与新的数据集进行比较，将评估AMOC的稳定性和可变性，这是气候模型非常需要的参数。

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.