Volcanic signatures of the Toba-Eruption (73 ka B.P.) in the EDML ice core (Antarctica) and southern ocean sediment cores: Implications for climate impact and climate teleconnections

多巴火山喷发（73 ka b.p.，印度尼西亚）是第四纪最大的火山事件，但迄今为止只在格陵兰冰芯中发现了它的硫酸信号。由火山SO2在平流层形成的硫酸气溶胶分散太阳辐射，因此具有显著的全球冷却效应。蕨类植物通过向海洋引入营养物质而使海水施肥，并促进浮游生物的光合作用，通过浮游生物对二氧化碳的固定而导致二氧化碳的净汇，从而增强了冷却效果。因此，本项目旨在核实EDML冰芯（南极洲）中多巴信号的存在和南大洋沉积物岩芯中多巴温层的存在，以提供关于硫酸气溶胶数量和温层向南分布的基本数据。这些导致全面评估其全球影响。它还试图验证作为格陵兰岛和南极冰芯之间的“联络点”的共同火山信号的存在，以使冰芯同步，并估计两极跷跷板现象造成的相位关系。

The Toba eruption (73 ka B.P., Indonesia) is the largest volcanic event in the Quaternary period but its sulfuric acid signal so far has only been found in a Greenland ice core. Sulfuric acid aerosols forming by volcanic SO2 in the stratosphere disperse solar radiation and thereby have a significant global cooling effect. Tephras enhance the cooling effect because they fertilize ocean water by introduction of nutrients to the ocean and promote plankton photosynthetic activity, leading to net sink of CO2 due to planktonic fixation of CO2. This project, therefore, seeks to verify the presences of the Toba signal in the EDML ice core (Antarctica) and the Toba tephra layer in Southern Ocean sediment cores to provide essential basic data on an amount of sulfuric acid aerosols and the southward distribution of tephra. These lead to comprehensively evaluate its global impact. It also seeks to verify the presence of common volcanic signals as “tie-points” between Greenland and Antarctic ice cores to synchronize the cores and estimate a phase relationship due to the bipolar seesaw phenomenon.