Sensitivity of the Antarctic Ice Sheet to Late Quaternary Climat Change

南极冰盖对晚第四纪气候变化的敏感性

• 批准号: 9118678
• 负责人: George Denton
• 金额: $ 29.26万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1998-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9118678&HistoricalAwards=false
• 关键词: Sensitivity; Antarctic; Ice; Sheet; Late

This award is for support of a project to assess mechanisms of Antarctic ice-sheet and paleoclimatic evolution through the last glacial cycle in the Ross Embayment. Detailed examination of the glacial geology and isotope chronology of carefully selected field areas will be undertaken in order to test hypotheses of extensive or limited grounded ice in the Ross Embayment at the last glacial maximum. Intergration of this geologic record with ice-core glaciochemistry from the McMurdo Dome core will produce the first isotopically dated Antarctic paleoclimatic curve. This information will allow disentanglement of important paleoclimatic forcings of ice sheet evolution, evaluation of hypotheses of ice-age climate dynamics requiring rapid, synchronous global change, and tests of the sensitivity of the West Antarctic ice sheet to climate change.

该奖项是对一个项目的支持，该项目旨在评估罗斯湾最后一个冰川周期中南极冰盖和古气候演变的机制。将对精心选择的野外区域的冰川地质和同位素年代学进行详细检查，以检验罗斯湾在最后一次冰川高峰期广泛或有限地结冰的假说。将这一地质记录与麦克默多穹顶冰芯的冰芯冰化学相结合，将产生第一条南极古气候同位素测年曲线。这些信息将有助于解开冰盖演化的重要古气候因素，评估需要快速、同步全球变化的冰期气候动力学假说，并测试西南极冰盖对气候变化的敏感性。