Collaborative Research: Cosmogenic Radionuclides in the Deep WAIS Divide Core

Caffee/0839042 该奖项根据 2009 年美国复苏和再投资法案（公法 111-5）提供资金。该奖项支持一个测量 WAIS 鸿沟冰芯深处的宇宙放射性核素铍 10 浓度的项目。 由于宇宙放射性核素是用于冰芯绝对测年和推导古积累率的关键参数之一，因此必须快速有效地进行这些测量，并且一旦获得结果就必须传播信息。 该项目的智力优势在于，它将允许对 WAIS Divide 的冰芯与之前测量的北极冰芯宇宙放射性核素记录（特别是 GISP2 和 GRIP）进行比较。该项目将使科学家能够将那些在局部层面起作用的过程与产生全球影响的过程区分开来，并将提供独立的年代标记，以帮助重建 WAIS Divide 冰芯年代学。 宇宙 10Be 剖面还可用于研究太阳活动对气候的可能作用。将放射性核素浓度与不同地点冰芯中的古气候记录进行直接比较，将有助于更深入地了解太阳强迫气候的时间和幅度。 该项目更广泛的影响包括：(i) 组建一个多学科合作团队，负责解释来自 WAIS 鸿沟和其他冰芯的宇宙放射性核素数据的未来分析。 (ii) 通过对冰样本的详细研究，让研究生和本科生参与大型气候研究项目并对其进行培训。 (iii) 有机会向广泛的实验室参观者和当地 K-12 学校的学生强调冰芯和气候变化研究的重要性。该奖项不涉及南极洲的实地工作。

Caffee/0839042 This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This award supports a project to measure the concentration of the cosmogenic radionuclide, Beryllium-10 in the deep WAIS divide ice core. Since cosmogenic radionuclides are one of the key parameters used for absolute dating of the ice core and deriving paleoaccumulation rates, it is essential that these measurements be made quickly and efficiently, and that the information is disseminated as soon as the results are available. The intellectual merit of the project is that it will allow a comparison to be made between the core from WAIS Divide and previously measured cosmogenic radionuclide records from Arctic ice cores, particularly GISP2 and GRIP This project will enable scientists to delineate those processes acting at a local level from those that produce global effects and will provide independent chronological markers to aid in the reconstruction of the WAIS Divide ice core chronology. The cosmogenic 10Be profile can also be used to investigate the possible role of solar activity on climate. The direct comparison of radionuclide concentrations with paleoclimate records in ice cores from different sites will provide more insight in the timing and magnitude of solar forcing of climate. The broader impacts of this project include: (i) the formation of a multi-disciplinary team of collaborators for the interpretation of future analyses of cosmogenic radionuclide data from the WAIS divide and other ice cores. (ii) the involvement and training of graduate and undergraduate students in the large scale project of climate research through detailed studies of ice samples. (iii) the opportunity to highlight to a wide range of lab visitors and students from local K-12 schools the importance of ice core and climate change studies.This award does not involve field work in Antarctica.