DANGER DML - Deciphering the evolution of an East ANtarctic drainage system over the last Glacial cycle in westERn Dronning Maud Land

危险 DML - 破译 Dronning Maud 地西部最后一个冰川周期东南极排水系统的演变

• 批准号: 506043073
• 负责人: Dr. Steven Franke
• 金额: --
• 依托单位国家: 德国
• 项目类别: WBP Position
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/506043073?language=en
• 关键词: DANGER; DML; Deciphering; evolution; East

An understanding of Antarctic ice-sheet behaviour is critical for evaluating the role of the polar ice caps in the climate system and for constraining the global impact of sea-level rise in a future warming climate. Critical for assessing the potential future behaviour of the East Antarctic Ice Sheet is to document how it changed over the last glacial cycle (~ 0 – 115 thousand years ago) and to identify areas that were vulnerable to these changes. However, there is a lack of suitable observations and models that can realistically simulate East Antarctica's ice-sheet evolution. This deficiency will be addressed in DANGER DML. The overall goal of the project is to better understand how a major sector of the East Antarctic Ice Sheet reacted to ice-sheet changes during the last glacial cycle by applying a novel structural analysis method for internal layers in the ice to reconstruct ice-flow patterns of the past. This enables a new way to investigate the past ice-dynamic behaviour of a major drainage basin in Dronning Maud Land (Jutulstraumen and its neighboring catchments) over the last glacial cycle and in particular the transition from the Last Glacial Maximum to the Holocene.

了解南极冰盖的行为对于评估极地冰盖在气候系统中的作用以及在未来变暖的气候中限制海平面上升的全球影响至关重要。评估南极东部冰盖未来潜在行为的关键是记录它在上一个冰期周期（~ 0 - 11.5万年前）的变化，并确定易受这些变化影响的地区。然而，缺乏合适的观测和模式，可以真实地模拟南极洲东部冰盖的演变。这个缺陷将在DANGER DML中得到解决。该项目的总体目标是通过应用一种新的冰内层结构分析方法来重建过去的冰流模式，更好地了解东南极冰盖的一个主要部分在最后一个冰川循环期间对冰盖变化的反应。这为研究末次冰期旋回，特别是末次盛冰期到全新世的过渡期间Dronning Maud Land （Jutulstraumen及其邻近流域）主要流域的冰动力行为提供了一种新的方法。