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

*** 9814782该奖项是为了支持一个项目，该项目旨在建立玛丽伯德地的Takahe火山的火山活动的详细记录，该项目将提供南极西部冰盖（WAIS）最近一次冰川循环期间内陆古冰水平的绝对年龄和高度数据。先前在高河山的工作记录了位于较低侧面的火山沉积物，这些火山沉积物是在WAIS的下方，上方或上方喷发的。这些沉积物的年代可以追溯到距今10.4万年至7000年前，这表明，在最后一次冰期循环期间，内陆WAIS比现在要高得多。内陆古冰位可以用来检验关于威斯康星晚期WAIS结构和WAIS退缩在全球海平面上升中的作用的相互矛盾的假设。为了评估WAIS与气候系统之间的关系，可以将过去10万年的内陆古冰位限制与全球气候变化记录进行比较。最后，精确定年的古冰位可以作为冰盖动力学数值模型的“硬”输入数据。＊＊＊

*** 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. ***