Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)

智力优势：PIS提议使用航空地球物理学在西南极的玛丽·伯德陆地穹顶上提供详细的地球物理测绘。他们将使用配备有先进的冰层穿透雷达、磁强计、航空重力仪和激光高度计的巴斯勒。他们将通过三种方式测试玛丽·伯德陆地岩石圈演化模型：1)首次约束玛丽·伯德陆地中部的基岩地形和地壳结构；2)绘制玛丽·伯德陆地的冰下地貌图，以约束地形演化；以及3)绘制冰下火山中心的分布图，并识别活动来源。玛丽·伯德大陆是南极西部为数不多的基岩位于海平面以上的地区之一；因此，它在西南极冰盖(WAIS)的形成和衰变中发挥着关键作用，从而对新近纪期间海平面的变化起到了关键作用。几条证据表明，玛丽·伯德大陆的地形在新生代的过程中发生了变化，这对冰盖的起源和演化具有重要意义。更广泛的影响：这项工作将对冰冻圈和地球动力学群落产生重要影响。这些数据还将利用POLENET项目的成果。PIS将对研究生和本科生进行解释大型地球物理数据集的培训，使他们有机会共同撰写同行评审的论文，并向更广泛的科学界介绍他们的工作。这项研究还将支持一位年轻的女性研究员。私人投资机构将利用其极地研究网站开展非正式教育，并正式参与K-12课程的开发。这项研究将结合微博和数据访问，使S的一阶假说得到公开证实或否认。

Intellectual Merit: The PIs propose to use airborne geophysics to provide detailed geophysical mapping over the Marie Byrd Land dome of West Antarctica. They will use a Basler equipped with advanced ice penetrating radar, a magnetometer, an airborne gravimeter and laser altimeter. They will test models of Marie Byrd Land lithospheric evolution in three ways: 1) constrain bedrock topography and crustal structure of central Marie Byrd Land for the first time; 2) map subglacial geomorphology of Marie Byrd Land to constrain landscape evolution; and 3) map the distribution of subglacial volcanic centers and identify active sources. Marie Byrd Land is one of the few parts of West Antarctica whose bedrock lies above sea level; as such, it has a key role to play in the formation and decay of the West Antarctic Ice Sheet (WAIS), and thus on eustatic sea level change during the Neogene. Several lines of evidence suggest that the topography of Marie Byrd Land has changed over the course of the Cenozoic, with significant implications for the origin and evolution of the ice sheet.Broader impacts: This work will have important implications for both the cryospheric and geodynamic communities. These data will also leverage results from the POLENET project. The PIs will train both graduate and undergraduate students in the interpretation of large geophysical datasets providing them with the opportunity to co-author peer-reviewed papers and present their work to the broader science community. This research will also support a young female researcher. The PIs will conduct informal education using their Polar Studies website and contribute formally to K-12 curriculum development. The research will incorporate microblogging and data access to allow the project?s first-order hypothesis to be confirmed or denied in public.