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

在过去的40年里，南极冰盖(AIS)一直在变薄和退缩，这引发了人们的担忧，即人为气候变化可能会引发西AIS部分地区的迅速崩溃，并随后导致全球海平面上升。对这一主要冰盖对全球变暖的反应进行可靠预测，对于制定有效的海平面上升适应战略是必要的。然而，目前的观测只涵盖了其进化史的一小部分。古重建能够提供有关AIS过去动态和形态的信息，提供充分了解其对气候变化的可能响应所需的更长期的背景。该项目将收集和分析回波探测数据，以制作南极半岛大陆架的海底地貌图和声学和地震剖面。从这些数据中识别冰海地貌将有助于对南极半岛冰盖(APIs)自上一次冰盛期以来的演变做出推断。从这些分析中得出的结论将被用来帮助约束和验证数值冰盖模型。因此，该项目将有助于提高我们适应和减缓气候变化的能力所需的研究主体。

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.