Identifying abrupt climate change in SE Europe during MIS 12-11 based on high-resolution pollen analysis of the Tenaghi Philippon archive (NE Greece)

该项目旨在以前所未有的时间分辨率（约150年）为海洋同位素阶段（MIS）12和11生成新的陆地花粉记录。这将为第四纪最极端的冰期和间冰期的气候演变提供详细的见解，从而有助于更好地了解气候突变的机制。该项目的目标将通过使用2009年回收的新岩心分析Tenaghi Philippon（希腊东北部）标志性的陆地气候档案来实现。具体而言，该项目将重建（一）MIS 12期间类似D-O和Heinrich的气候变率，这是海洋和冰记录中第四纪最冷的冰川;以及（二）MIS 11期间生态系统对逐渐气候变暖和突变的反应，这是目前间冰期的最佳轨道模拟之一。Tenaghi Philippon档案最适合解决这些目标，因为（一）其特殊的地层完整性;（二）其接近冰川避难所的嗜热植物，最大限度地减少气候强迫和植被响应之间的时间滞后记录在花粉数据;和（三）其高灵敏度记录北方半球高纬度气候变率。该项目的目标将在对394个花粉样本进行分析的基础上实现，这将产生比以前Tenaghi Philippon高5倍的分辨率。结合正在进行的对相同岩心的隐晶层和XRF分析（DFG项目KO 4960/3-1），将根据一个强大的年代地层框架对所确定的植被事件进行校准，从而可以与东地中海（ODP站点967）、伊比利亚边缘和北大西洋（ODP站点980和983）的海洋记录进行详细比较。该项目将提供新的见解短期气候和环境变化的性质在东地中海地区在第四纪;最终，它将有助于更好地了解触发机制的气候变化下的边界条件端元，因为他们是在MIS 12和11实现。

The project aims to generate a new terrestrial pollen record for Marine Isotope Stages (MIS) 12 and 11 at unprecedented temporal resolution (~150 years) for that time interval. This will provide detailed insight into the climate evolution of the most extreme glacial and interglacial intervals of the Quaternary, thus contributing to a better understanding of the mechanisms responsible for abrupt climate change. The project goals will be achieved via analysis of the iconic terrestrial climate archive of Tenaghi Philippon (NE Greece) using new cores recovered in 2009. Specifically, the project will reconstruct (i) the D-O- and Heinrich-like climate variability during MIS 12, which represents the coldest glacial of the Quaternary in marine and ice records; and (ii) the ecosystem response to gradual climate warming and abrupt change during MIS 11, which serves as one of the best orbital analogues for the current interglacial. The Tenaghi Philippon archive is optimally suited for addressing these objectives due to (i) its exceptional stratigraphical completeness; (ii) its proximity to glacial refugia of thermophilous plants, which minimizes the time lag between climate forcing and vegetation response as documented in pollen data; and (iii) its high sensitivity in recording Northern Hemisphere high-latitude climate variability. The project goals will be reached based on the analysis of 394 pollen samples that will yield a ~5x higher resolution than previously available for Tenaghi Philippon. In combination with ongoing cryptotephra and XRF analyses on the same cores (DFG project KO4960/3-1), the identified vegetation events will be calibrated against a robust chronostratigraphical framework, allowing detailed comparison with marine records from the Eastern Mediterranean (ODP Site 967), the Iberian Margin, and the North Atlantic (ODP Sites 980 and 983). The project will provide new insights into the nature of short-term climate and environmental change in the Eastern Mediterranean region during the Quaternary; ultimately, it will contribute to a better understanding of the trigger mechanisms of climate change under boundary-condition endmembers as they were realized during MIS 12 and 11.