An Investigation into the Stability and Dynamics of the Antarctic Peninsular Ice Sheet During the Last Deglaciation

末次冰消期南极半岛冰盖的稳定性和动力学研究

• 批准号: 2843365
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2843365
• 关键词: Investigation; into; Stability; Dynamics; Antarctic

The Antarctic Ice Sheet (AIS) has been thinning and retreating over the past 40 years promptingfears that anthropogenic climate change could initiate a rapid collapse of parts of the West AIS anda subsequent increase in global sea levels. Reliable predictions of the response of this major icesheet to global warming are necessary for effective sea level rise adaptation strategies to beformulated. However, present day observations only cover a very small fraction of its evolutionhistory. Palaeo reconstructions are able to offer information about the past dynamics andmorphology of the AIS, providing the longer term context required to fully understand its possibleresponses to climate change.This project will collect and analyse echo sounding data to produce seafloor morphology maps andacoustic and seismic profiles of the Antarctic Peninsula (AP) continental shelf. The identification ofglacio-marine landforms from these data will enable inferences to be made about the evolution ofthe Antarctic Peninsula Ice Sheet (APIS) since the Last Glacial Maximum. Conclusions drawn fromthese analyses will then be used to help constrain and validate numerical ice sheet models. Assuch, this project will contribute to the body of research required to improved our ability to adapt to,and mitigate, climate change.

过去 40 年来，南极冰盖 (AIS) 一直在变薄和消退，这引发了人们的担忧，即人为气候变化可能会引发西南极冰盖部分地区的迅速崩塌，并随后导致全球海平面上升。为了制定有效的海平面上升适应策略，必须可靠地预测这一主要冰盖对全球变暖的反应。然而，目前的观察只涵盖了其进化历史的一小部分。古重建能够提供有关 AIS 过去动态和形态的信息，为充分了解其对气候变化的可能反应提供所需的长期背景。该项目将收集和分析回声探测数据，以生成海底形态图以及南极半岛 (AP) 大陆架的声学和地震剖面。从这些数据中识别冰川海洋地貌将能够推断自末次盛冰期以来南极半岛冰盖（APIS）的演变。从这些分析中得出的结论将用于帮助约束和验证数值冰盖模型。因此，该项目将为提高我们适应和缓解气候变化的能力所需的研究做出贡献。