Collaborative Research: Sonic Logging the NEEM Corehole, Greenland

过去从格陵兰冰盖中发现的深冰芯未能获得完整的Eemian冰，即末次间冰期的冰。 最近NEEM的努力已经成功地恢复了约150米的冰。 拟议的冰结构连续声波监测将解决小规模的变化，这是错过了冰芯的薄切片分析，往往采样不足的核心所使用的传统技术。 用声波取样所恢复的鳞片与用新的气体取样技术所能观察到的鳞片更具有可比性。 拟议的工作将增加所需的物理数据集，以充分解释从NEEM冰芯中回收的数据，例如用于推断过去大气条件的气体含量分析。 今年夏天，美国地质勘探局的一个特殊绞车的存在，华盛顿大学仪器的操作所需的绞车拟议部署，并计划放弃NEEM外地营地后，2012年夏天，使这个建议适合快速奖。 更广泛的影响：该项目将为一名研究生提供国际经验，并为一名女科学家在其职业生涯的形成期提供支持。 它将促进与斯堪的纳维亚的国际合作。

Past deep ice cores recovered from the Greenland Ice Sheet have failed to obtain intact Eemian ice, ice from the last interglacial period. The recent NEEM effort has successfully recovered ~150 m of such ice. The proposed continuous sonic monitoring of the ice fabric will resolve small scale variability that is missed by the traditional techniques used in thin section analyses of ice cores, which tend to under-sample the core. The scales to be recovered with the sonic sampling are more comparable to those that can be observed with new gas-sampling technologies. The proposed work would add to the physical data set required to fully interpret data being recovered from the NEEM ice core, such as the gas content analyses used to infer past atmospheric conditions. The presence of a special USGS winch this summer, a winch required for the operation of University of Washington instrument proposed for deployment, and the planned abandonment of the NEEM field camp after the summer of 2012, make this proposal appropriate for a RAPID award. Broader Impacts:The project will provide international experience for a graduate student and support for a female scientist during the formative years of her career. It will contribute to international collaborations with Scandinavia.