Development of a Standard Antarctic Nearshore Diatom Biozonation

该奖项由极地方案办公室南极地质学和地球物理学方案提供，支持为南极海洋近岸环境制定标准化硅藻生物区划。该项目需要对从南极大陆边缘恢复的近岸沉积序列进行硅藻生物地层学和古环境分析。这项工作的核心是硅藻分类调查，使用将从麦克默多湾恢复的序列作为罗伯茨角项目（CRP）的一部分，并辅以其他相关的钻孔岩心材料。南极近岸新生代海相生物的分类分析与精化，2.生物地层的厘定及应用;建立和公布南极近岸硅藻生物地层综合分区，为今后的南极大陆架取样提供框架（例如，ANDRILL），4.对极地硅藻谱系的演化模式和克里思进行了评价。评估南极古环境的演变，特别是持续海冰的起源和分析海冰随时间的波动。这项工作将提高我们对南极新生代气候发展的认识，并为冰川波动和海冰历史提供有价值的见解，这是气候模式发展的重要因素。它将通过提供直接适用于未来南极钻探的生物地层分区来支持科学知识的基础设施。因此，这项工作将大大改善和简化初始岩心表征，从而增加ANDRILL和其他拟议的未来钻探工作的直接科学影响。

This award, provided by the Antarctic Geology and Geophysics Program of the Office of Polar Programs, supports the development of a standardized diatom biozonation for Antarctic marine near-shore environments. The project entails diatom biostratigraphic and paleoenvironmental analyses of recovered near-shore sediment sequences from the margins of the Antarctic continent. At the heart of the work is diatom taxonomic investigation using will be sequences recovered from McMurdo Sound as part of the Cape Roberts Project (CRP), supplemented by other relevant drill core material.Scientific Objectives and Intellectual Merit of the Proposal Include:1. Taxonomic analysis and refinement of Antarctic near-shore Cenozoic marine diatoms,2. Biostratigraphic determination and application of these diatoms,3. Establishment and publication of an integrated Antarctic near-shore diatom biostratigraphic zonation, providing a framework for future Antarctic continental shelf sampling (e.g., ANDRILL),4. Evaluation of the mode and tempo of evolution of polar diatom lineages, and5. Evaluation of the evolution of Antarctic paleoenvironments, especially the origin of persistent sea ice and analysis of sea-ice fluctuations through time.Broader Impact of the Project:This work will train a graduate student in diatom biostratigraphy and paleoenvironmental studies. The work will improve our understanding of Cenozoic climatic development of Antarctica, and contribute valuable insights into glacial fluctuations and sea ice history, which are important elements for climate model development. It will support the infrastructure of scientific knowledge by providing a biostratigraphic zonation directly applicable to future Antarctic drilling. As such, this work will greatly improve and streamline initial core characterization, thus increase the immediate scientific impact of ANDRILL and other proposed future drilling efforts.