Mapping and modeling deglacial ice dynamics and relative sea-level history in Newfoundland

纽芬兰冰消冰动力学和相对海平面历史的测绘和建模

• 批准号: 203526-2013
• 负责人: Bell, Trevor
• 金额: $ 2.4万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=546356
• 关键词: Mapping; modeling; deglacial; ice; dynamics

This research program focuses on two themes: 1) the history and dynamics of the Newfoundland Ice Cap during the last glaciation, from retreat across the continental shelf to final melting in the interior of the island; and 2) the history of sea-level fluctuations around Newfoundland in response to ice cap retreat and melting. Ice retreat history will be investigated through examination and field mapping of landforms and landscapes preserved from ice cap advance and retreat. A new focus in this proposal is to combine glacial landform data from the inner continental shelf, mapped using sonar surveys, with landform data onshore, mapped from aerial photographs and satellite imagery. Topics of particular research interest are the evidence for former ice streams (fast-flowing glacier ice) in the Newfoundland Ice Cap and the timing and pattern of ice-marginal retreat. Results should provide new potential for understanding the behaviour of a small maritime ice cap during an overall period of climate warming and will have immediate application to the mineral exploration industry in Newfoundland because ice transport distances under rapid flow in an ice stream may be greater than originally thought.

该研究计划侧重于两个主题：1）纽芬兰冰盖在末次冰期的历史和动态，从大陆架的退缩到岛屿内部的最终融化; 2）纽芬兰周围海平面波动的历史，以应对冰盖的退缩和融化。将通过检查和实地测绘冰帽进退保存下来的地貌和景观，调查冰退缩的历史。 这项建议的一个新重点是将利用声纳勘测绘制的内大陆架冰川地貌数据与利用航空照片和卫星图像绘制的陆上地貌数据结合起来。 特别感兴趣的研究课题是前冰流（快速流动的冰川冰）在纽芬兰冰帽和冰边缘撤退的时间和模式的证据。 结果应提供新的潜力，了解一个小的海洋冰帽在整个气候变暖期间的行为，并将立即应用于纽芬兰的矿产勘探行业，因为冰流中的快速流动下的冰运输距离可能比原来想象的要大。