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

9725910麦金托什该奖项是为了表彰对一个项目的支持，该项目旨在建立一个详细的火山活动记录。该项目将提供最近一次冰川周期期间西南极冰盖内陆古冰层(WAIS)的绝对年龄和海拔数据。之前在Mt.Takahe记录了位于WAIS下侧的火山沉积，这些火山沉积在WAIS水平以下或之上喷发。这些沉积物的年代是在距今10.4万年到7000年之间，这表明在上一次冰川周期中，内陆的WAIS比现在高得多。内陆古冰面可以用来检验关于WAIS在威斯康星州晚期的配置以及WAIS在全球海平面上升中的作用的相互矛盾的假设。可以将过去100,000年来内陆古冰平面的严格限制与全球气候变化记录进行比较，以评估世界气候变化系统与气候系统之间的关系。最后，精确测年的古冰层可以作为冰盖动力学数值模型的“硬”输入数据。

9725910 McIntosh 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.