Geochemical signatures of tephra layers in Antarctic ice cores (EDML and Dome Fujii) Implications for source identification, palaeoatmospheric circulation and ice core correlations

南极冰芯中的热菌层有助于限制遥远的深层冰芯之间的相关性，并在它们可能与已知年龄的喷发有关的情况下代表重要的时间标记。这些时间标志可与现有的以δ18O和δD/H为基础的地层学参数相结合。为此，我们计划测定EPICA-Dronning Maud Land和Dome Fuji （Dronning Maud Land）深层冰芯中冰层的主要元素和微量元素组成、粒度和形态。这些数据将用于与来自玛丽伯德地（西南极洲）、沃斯托克和Dome C（威尔克斯地）的其他冰芯的相关性。这类数据还将有助于确定潜在的火山来源地区，例如南极洲的火山地区（罗斯海裂谷、玛丽伯德地、南设得兰群岛）以及新西兰、巴塔哥尼亚和南部海洋的火山ozean岛屿。有了这样的相关性，我们希望为相关的冰川学问题提供重要的数据（例如，积雪率，冰的分布模式以及古风模式），这些都是在南极洲研究的普遍兴趣。

Tephra layers in ice cores from Antarctica help to constrain correlations between distant deep ice cores and represent important time markers in the case they can be related to an eruption of known age. These time markers can be combined with existing cherno-stratigraphic parameters such as stratigraphy based on δ18O and δD/H. To that end, we plan to determine major and trace element compositions, grain size and morphologxy of tephra layers from the deep ice cores EPICA-Dronning Maud Land and Dome Fuji (Dronning Maud Land). This data will be used for correlations to other ice cores from Marie Byrd Land (West Antarctica), Vostok and Dome C (Wilkes Land). Such data will also allow the identification of potential source areas for the tephra, e.g. volcanic regions in Antarctica (Ross Sea Rift, Marie Bird Land, South Shetland Islands) as well as New Zealand, Patagonia and the volcanic ozean islands in the southern oceans. With such correlation we hope to provide important data for relevant glaciological problems (e.g. snow accumulation rates, distribution patterns of tephra and thus palaeo-wind patterns), which are of general interest to research in Antarctica.