Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island

0944307/康威该奖项支持一个项目，使用罗斯福岛冰芯作为东部罗斯海的冰川学量尺。 最近的注意力集中在罗斯湾东部，那里没有冰厚度变化的地质限制，因为缺乏突出的岩石“量尺”，冰盖可以留下高海拔的可追溯记录。最近的工作表明，可以将日期确定的冰芯用作量油尺，以得出冰厚度的历史。来自新西兰和丹麦的合作伙伴将在2010-2011年和2011-12年的南方夏季从罗斯福岛提取冰芯。他们的科学目标是帮助了解过去40 kyr的气候变化。该项目的科学目标不是气候记录，而是罗斯海冰川消退的历史。罗斯海东部的新历史将与罗斯海中部（Siple Dome和Byrd）的冰川历史以及罗斯海西部边缘沿着的地质和海洋记录的现有和新出现的历史相结合，并将使研究人员能够建立一个更新的，自洽的模型，该模型描述LGM期间罗斯湾的冰的配置和厚度，以及冰川消退的时间。这项工作的结果将为新一代冰盖模型提供地面实况，该模型将冰流和快速流动动力学结合起来。现实的冰盖模型不仅需要预测未来可能的环境的响应，而且还需要研究过去的行为冰盖。这项研究有助于实现西南极冰盖倡议的主要目标以及国际极地年对冰盖历史和动态的关注。它还有助于了解过去40 kyr气候变化和气候动态的时空模式，这是冰芯科学国际伙伴关系（IPICS）的主要目标之一。 该项目将有助于培养下一代科学家，并将有助于教育和培训两名博士。学生所有参与者都将受益于国际合作，这将使他们接触到不同的领域和实验室技术，并有利于未来的合作工作。 所有参与者都参与科学推广和本科教育，并致力于促进多样性。外展将通过定期安排的社区和K-12外展活动，会谈和PI的流行写作，以及通过大学新闻办公室完成。

0944307/ConwayThis award supports a project to use the Roosevelt Island ice core as a glaciological dipstick for the eastern Ross Sea. Recent attention has focused on the eastern Ross Embayment, where there are no geological constraints on ice thickness changes, due to the lack of protruding rock "dipsticks" where the ice sheet can leave datable records of high stands. Recent work has shown how dated ice cores can be used as dipsticks to derive ice-thickness histories. Partners from New Zealand and Denmark will extract an ice core from Roosevelt Island during the 2010-2011 and 2011-12 austral summers. Their science objective is to contribute to understanding of climate variability over the past 40kyr. The science goal of this project is not the climate record, but rather the history of deglaciation in the Ross Sea. The new history from the eastern Ross Sea will be combined with the glacial histories from the central Ross Sea (Siple Dome and Byrd) and existing and emerging histories from geologic and marine records along the western Ross Sea margin and will allow investigators to establish an updated, self-consistent model of the configuration and thickness of ice in the Ross Embayment during the LGM, and the timing of deglaciation. Results from this work will provide ground truth for new-generation ice-sheet models that incorporate ice streams and fast-flow dynamics. Realistic ice-sheet models are needed not only for predicting the response to future possible environments, but also for investigating past behaviors of ice sheets. This research contributes to the primary goals of the West Antarctic Ice Sheet Initiative as well as the IPY focus on ice-sheet history and dynamics. It also contributes to understanding spatial and temporal patterns of climate change and climate dynamics over the past 40kyr, one of the primary goals of the International Partnerships in Ice Core Sciences (IPICS). The project will help to develop the next generation of scientists and will contribute to the education and training of two Ph.D. students. All participants will benefit from the international collaboration, which will expose them to different field and laboratory techniques and benefit future collaborative work. All participants are involved in scientific outreach and undergraduate education, and are committed to fostering diversity. Outreach will be accomplished through regularly scheduled community and K-12 outreach events, talks and popular writing by the PIs, as well as through University press offices.