Late Pleistocene Island West Antarctic Ice Sheet Elevations at Mt. Takahe

晚更新世岛西南极洲高河山冰盖海拔

• 批准号: 9814782
• 负责人: Thomas Wilch
• 金额: $ 11.43万
• 依托单位: Albion College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814782&HistoricalAwards=false
• 关键词: Late; Pleistocene; Island; West; Antarctic

*** 9814782 This award is for support for a project to establish a detailed record of volcanism at Mt. Takahe volcano in Marie Byrd Land that will provide absolute age and elevation data on inland paleo-ice levels on the West Antarctic ice sheet (WAIS) during the most recent glacial cycle. Previous work at Mt. Takahe documented volcanic deposits located on the lower flanks that were erupted beneath, at, or above the level of the WAIS. These deposits have been dated to between 104,000 and 7,000 years before present and suggest that the inland WAIS was much higher during the last glacial cycle than it is today. The inland paleo-ice level can be used to test conflicting hypotheses about the configuration of the WAIS in late Wisconsin time and the role of WAIS retreat in global sea level rise. Well constrained limits on inland paleo-ice-levels during the past 100,000 years can be compared with global records of climate change in order to assess the relationship between the WAIS and the climate system. Finally, precisely dated paleo-ice- levels can be used as "hard" input data for numerical models of ice sheet dynamics. ***

* 9814782该奖项是为了支持一个项目，以建立一个详细的火山活动记录在山。位于玛丽伯德地的塔卡赫火山，将提供最近一次冰川循环期间西南极冰盖（WAIS）内陆古冰水平的绝对年龄和海拔数据。 以前在Mt。Takahe记录了位于下翼的火山沉积物，这些火山沉积物在WAIS之下、之处或之上喷发。 这些沉积物可以追溯到距今104，000年至7，000年之间，表明内陆WAIS在末次冰期周期比今天高得多。 内陆的古冰水平可以用来测试相互矛盾的假设的配置WAIS在晚威斯康星州的时间和WAIS撤退在全球海平面上升的作用。 过去10万年来内陆古冰水位的严格限制可以与全球气候变化记录进行比较，以评估WAIS与气候系统之间的关系。 最后，精确定年的古冰层高度可以作为冰盖动力学数值模型的“硬”输入数据。 ***