Collaborative Research: Sonic Logging the NEEM Corehole, Greenland

合作研究：格陵兰岛 NEEM 岩心孔声波测井

• 批准号: 1208806
• 负责人: Erin C Pettit
• 金额: $ 5.84万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-03-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1208806&HistoricalAwards=false
• 关键词: Collaborative; Research; Sonic; Logging; NEEM

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.

过去从格陵兰冰盖恢复的深层冰芯未能获得完整的峨眉冰，即上一个间冰期的冰。 最近的 NEEM 工作已成功恢复约 150 m 的此类冰。 所提出的对冰结构的连续声波监测将解决冰芯薄片分析中使用的传统技术所遗漏的小尺度变化，这些技术往往会对冰芯进行欠采样。 通过声波采样回收的水垢与通过新的气体采样技术观察到的水垢更具可比性。 拟议的工作将增加充分解释从 NEEM 冰芯恢复的数据所需的物理数据集，例如用于推断过去大气条件的气体含量分析。 今年夏天出现了一个特殊的 USGS 绞盘，一个运行华盛顿大学建议部署的仪器所需的绞盘，以及计划在 2012 年夏天之后放弃 NEEM 野外营地，使得该提案适合 RAPID 授予。 更广泛的影响：该项目将为研究生提供国际经验，并为女科学家职业生涯的形成期提供支持。 它将有助于与斯堪的纳维亚半岛的国际合作。