Deglacial Radiocarbon Chronology of the Western Ross Sea from Relative Sea-Level Curves

从相对海平面曲线看西罗斯海冰消期放射性碳年代学

• 批准号: 9615285
• 负责人: George Denton
• 金额: $ 2.76万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-12-01 至 1998-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9615285&HistoricalAwards=false
• 关键词: Deglacial; Radiocarbon; Chronology; Western; Ross

This award provides support for one year of funding to perform carbon-14 analyses on samples (seal skin and Adamussium colbecki shells) collected in firm stratigraphic position within numerous raised beaches along the Scott Coast of the western Ross Sea, Antarctica. These measurements will enable the development of a radiocarbon chronology and will result in detailed relative sea- level curves for five separate localities along the Scott Coast. These relative sea-level curves will help to constrain the timing of deglaciation in the western Ross Sea. During the last glaciation, West Antarctic ice expanded into the Ross Sea, merged with East Antarctic ice emanating from outlet glaciers in the Transantarctic Mountains, and extended to (or close to) the edge of the continental shelf. With an accurate, well-constrained chronology for ice recession in the western Ross Sea, those factors that could have triggered deglaciation and hence may have controlled the extent of the West Antarctic ice sheet will be able to be evaluated.

该奖项为一年的资金提供支持，用于对在南极洲罗斯海西部斯科特海岸沿着众多凸起海滩的坚固地层位置收集的样本（海豹皮和Adamussium colbecki贝壳）进行碳14分析。 这些测量将使放射性碳年代学的发展成为可能，并将导致沿着斯科特海岸五个不同地点的详细相对海平面曲线。 这些相对海平面曲线将有助于限制西部罗斯海冰川消退的时间。 在最后一次冰期，南极西部的冰扩展到罗斯海，与南极东部的冰合并，并延伸到（或接近）大陆架的边缘。 有了罗斯海西部冰层衰退的准确、严格的年表，就能够评估那些可能引发冰川消退、从而可能控制南极西部冰盖范围的因素。