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

0944307/康韦该奖项支持一项利用罗斯福岛冰芯作为罗斯海东部冰川学标尺的项目。最近的注意力集中在东部的罗斯湾，那里没有对冰层厚度变化的地质限制，因为缺乏突出的岩石“试纸”，那里的冰盖可以留下可测年的高位记录。最近的研究表明，冰芯的年代可以用来作为标尺来得出冰层厚度历史。来自新西兰和丹麦的合作伙伴将在2010-2011年和2011-12年的南半球夏季从罗斯福岛提取冰芯。他们的科学目标是帮助理解过去40年来的气候变化。这个项目的科学目标不是气候记录，而是罗斯海冰川消融的历史。来自罗斯海东部的新历史将与罗斯海中部(Siple Dome和Byrd)的冰川历史以及来自罗斯海西部边缘的地质和海洋记录的现有历史和新兴历史相结合，并将使调查人员能够建立一个关于末次盛冰期罗斯湾冰的形状和厚度以及冰川消融时间的更新的、自洽的模型。这项工作的结果将为包含冰流和快速流动动力学的新一代冰盖模型提供基础事实。现实的冰盖模型不仅用于预测对未来可能的环境的响应，而且还用于研究冰盖过去的行为。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冰盖年对冰盖历史和动态的关注。它还有助于理解过去40年来气候变化和气候动态的时空模式，这是国际冰芯科学伙伴关系的主要目标之一。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生。所有参与者都将从国际合作中受益，这将使他们接触到不同的现场和实验室技术，并有利于未来的合作工作。所有参与者都参与了科学推广和本科教育，并致力于促进多样性。外联将通过定期安排的社区和K-12外联活动、讲座和私人投资机构的通俗写作以及通过大学新闻办公室实现。

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.