Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)

Kurbatov/0838843该奖项支持一个项目，为艾伦山蓝冰区（BIA）生成一个绝对时间尺度，然后重建过去气候变化和温室气体浓度的细节，以追溯到2.5 Ma的特定时间段。冰河时代将通过应用新兴的方法来确定被捕获的气泡的绝对和相对年代（基于氩-40/氩-38，氧的δ-18 O和O2/N2比率）。为了证明艾伦山BIA作为古气候档案的潜力，将收集对应于110-140 ka，1 Ma和2.5 Ma的年龄间隔的海沟和冰芯。在拟定的两个油田季节期间，将结合挖沟，对总计6x 100 m和额外15 m的岩芯进行挖掘。 拟议活动的智力价值是，这项工作的成果将扩大南极冰核调查的里程碑式工作和其他深冰取芯工作，这些工作提供了可追溯到0.8 Ma的记录，并将补充国际南极冰核调查计划的工作，即钻取一个可追溯到1.5 Ma的连续南极冰芯。研究结果将有助于进一步了解0-2.5 Ma之间发生的主要气候制度和转变，包括40 kyr世界和中更新世气候转变。一个主要的长期科学目标是通过在艾伦山BIA建立一个“国际气候公园”，为收集古气候记录提供一种变革性的方法，这将使任何感兴趣的美国或外国调查人员能够对大量已知年龄为2.5 Ma的冰进行采样。拟议活动产生的更广泛的影响包括培训精通先进领域的学生，实验室和结合地球化学，冰川学和古气候学的数值模拟方法。我们将把与我们拟议的研究有关的材料纳入我们正在进行的地方教育工作和媒体宣传工作。缅因州大学已经拥有网络基础设施，使用最先进的基于网络的技术，可以为广大的科学家提供快速访问我们的研究成果的机会。这项工作将有助于广泛的气候变化研究，为全世界了解自然和人为强迫气候变化以及应对方案提供信息。 这个奖项在南极洲有实地工作。

Kurbatov/0838843 This award supports a project to generate an absolute timescale for the Allan Hills Blue Ice Area (BIA), and then to reconstruct details of past climate changes and greenhouse gas concentrations for certain time periods back to 2.5 Ma. Ice ages will be determined by applying emerging methods for absolute and relative dating of trapped air bubbles (based on Argon-40/Argon-38, delta-18O of O2, and the O2/N2 ratio). To demonstrate the potential of the Allan Hills BIAs as a paleoclimate archive trenches and ice cores will be collected for age intervals corresponding to 110-140 ka, 1 Ma, and 2.5 Ma. During the proposed two field seasons a total of 6x100 m and additional 15 m cores will be combined with trenching. The intellectual merit of the proposed activity is that the results of this work will extend the landmark work of EPICA and other deep ice coring efforts, which give records dating back to 0.8 Ma, and will complement work planned by IPICS to drill a continuous Antarctic ice core extending to 1.5 Ma. The results will help to advance understanding of major climate regimes and transitions that took place between 0-2.5 Ma, including the 40 kyr world and the mid-Pleistocene climate transition. A major long-term scientific goal is to provide a transformative approach to the collection of paleoclimate records by establishing an "International Climate Park" in the Allan Hills BIA that would enable sampling of large quantities of known age ice as old as 2.5 Ma, by any interested American or foreign investigator. The broader impacts resulting from the proposed activity include training students who are well versed in advanced field, laboratory and numerical modeling methods combining geochemistry, glaciology, and paleoclimatology. We will include material relevant to our proposed research in our ongoing efforts in local education and in our outreach efforts for media. The University of Maine already has cyberinfrastructure, using state of the art web-based technology, which can provide a wide community of scientists with fast access to the results of our research. The work will contribute to the broad array of climate change studies that is informing worldwide understanding of natural and anthropogenic forced climate change, and the options for responding. This award has field work in Antarctica.