The Black Sea Palaeoclimate and Environment during the penultimate glacial - reconstructions from lacustrine sediments (BlackPearl)

黑海对冰川-间冰期以及千年时间尺度上的全球气候波动非常敏感。最近的研究表明，在20-64 kaBP的海洋同位素阶段（MIS）2-4，Dansgaard-Oeschger（DO）气候变率明显地影响了前黑海湖的区域气候和环境条件，从而反映了北大西洋和欧亚大陆之间密切的大气遥相关。虽然类似DO的气候变率也可能在倒数第二次冰期（即MIS 6; 130-180 ka BP）期间盛行，但缺少包括定量温度重建在内的大陆证据来支持与末次冰期（MIS 2-4）期间类似的北半球遥相关。在RV Maria S的框架内。2013年，Merian巡航MSM 33，从黑海东南部取回了独特的沉积物岩心，这些岩心延伸到大约1000米。180 ka BP，因此覆盖了整个MIS 6。该项目旨在首次以高分辨率重建MIS 6期间以前孤立的黑海湖的古气候和环境演变。包括有机生物标志物、介形虫地球化学、常量和微量元素地球化学的多代用指标方法将用于以下主要目标：1.重建了MIS 6期间区域气候变化趋势，并详细重建了类似DO的短期千年尺度气候和环境变率.识别可能与Fleuve Manche古河流排放期间主要融化事件有关的水文变化（约150-160 ka BP）的芬诺斯堪的亚冰盖。对最后两次最大冰期的比较将有助于评估不同芬诺斯堪的纳维亚冰盖范围和相关大气环流模式对安纳托利亚/东地中海区域气候和环境变化的重要性，这些分析将得到合作伙伴提供的其他数据的补充，包括花粉和甲藻组合以及介形虫的O-和Sr-同位素。这些数据集将支持重建的盐度和生产力的湖泊黑海，以及在东北安纳托利亚的融水来源和植被变化的特点。

The Black Sea reacts very sensitive to global climate fluctuations occurring on glacial-interglacial but also on millennial timescales. Recent studies have shown that the so-called Dansgaard-Oeschger (DO) climate variability clearly affected the regional climate and environmental conditions in the formerly Black Sea Lake during Marine Isotope Stages (MIS) 2-4 (20-64 ka BP), thus reflecting a close atmospheric teleconnection between the North Atlantic and Eurasia. Although DO-like climate variability may have also prevailed during the penultimate glacial (i.e. MIS 6; 130-180 ka BP), continental evidence including quantitative temperature reconstructions is missing to approve a similar northern-hemispheric teleconnection as during the last glacial (MIS 2-4). In frame of the RV Maria S. Merian cruise MSM 33 in 2013, unique sediment cores were retrieved from the SE Black Sea, which extend back up to ca. 180 ka BP thus covering the entire MIS 6. This project aims to reconstruct for the first time and at high-resolution the palaeoclimate and environmental evolution in the formerly isolated Black Sea Lake during MIS 6. A multi-proxy approach comprising e.g. organic biomarkers, ostracod geochemistry, and major and trace element geochemistry will serve for the following main objectives:1. Reconstruction of the regional climate trends during MIS 6 and the detailed reconstruction of short-term DO-like millennial-scale climate and environmental variability.2. Identification of the hydrological changes possibly linked to the major melting episode during the Fleuve Manche palaeoriver discharge (ca. 150-160 ka BP) of the Fennoscandian Ice Sheet.3. A comparison of the last two glacial maxima will serve for assessing the importance of the different Fennoscandian Ice Sheet extents and associated atmospheric circulation patterns for climate and environmental changes in the Anatolian/eastern Mediterranean region.The analyses will be complemented by additional data including pollen and dinoflagellate assemblages as well as O- and Sr-isotopes on ostracods that will be provided by collaboration partners. These datasets will support the reconstructions of salinity and productivity in the limnic Black Sea as well as the characterisation of meltwater sources and vegetation changes in NE Anatolia.