Integrating terrestrial and marine sediment records from East Antarctica to explore late Pleistocene and Holocene ice sheet instability

整合东南极洲的陆地和海洋沉积物记录，探索晚更新世和全新世冰盖的不稳定性

• 批准号: 463250038
• 负责人: Dr. Sonja Berg
• 金额: --
• 依托单位: Institut für Geologie und Mineralogie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/463250038?language=en
• 关键词: Integrating; terrestrial; marine; sediment; records

Within the proposed project we want to study ice-ocean-climate interactions that potentially affected the stability of the East Antarctic Ice sheet from the late Pleistocene until present day. We select a multi-proxy approach to integrate evidence from terrestrial, lacustrine and marine sedimentary archives. Additionally, mumiyo deposits are used as archives to close the gap between the ice-proximal lacustrine and terrestrial and ice-distal open-marine archives. Three target regions were defined to exemplarily study different processes of ice-ocean-climate interaction: Central Dronning Maud Land and the adjacent ocean, Mawson Coast, part of the Mac. Robertson Land, and Thala Hills, an un-glaciated coastal site at Prince Olav Coast, Enderby Land.Reconstructions in the respective regions will include the temporal development of post-glacial ice retreat and the prevailing climatic conditions. Furthermore, biomarker and stable isotope analyses on marine sediments and mumiyo will be used to study the temporal variability of sea ice extent and polynya activity. Both parameters influence energy and gas exchange between atmosphere and ocean and ocean circulation, which interact with the ice sheet and ultimately affect ice sheet stability.

在拟议的项目中，我们希望研究从晚更新世到现在可能影响南极东部冰盖稳定性的冰-海洋-气候相互作用。我们选择了一种多代理方法来整合陆地、湖泊和海洋沉积档案的证据。此外，mumiyo沉积物被用作档案，填补了冰近端湖相与陆相和冰远端开放海相档案之间的空白。三个目标区域被定义为范例研究冰-海洋-气候相互作用的不同过程：中央Dronning Maud Land和邻近的海洋，Mawson Coast, Mac. Robertson Land的一部分，以及Thala Hills， Enderby Land王子奥拉夫海岸的一个未被冰川覆盖的海岸站点。在各自地区的重建将包括冰川后退缩的时间发展和当时的气候条件。此外，将利用海洋沉积物和沉积物的生物标志物和稳定同位素分析来研究海冰范围和冰湖活动的时间变化。这两个参数都影响大气与海洋之间的能量和气体交换以及海洋环流，它们与冰盖相互作用，最终影响冰盖的稳定性。