Developing Dry Extraction of Ice Core Gases and Application to Millennial-Scale Variability in Atmospheric CO2

开发冰芯气体干法提取及其在大气二氧化碳千年尺度变化中的应用

• 批准号: 0337891
• 负责人: Edward Brook
• 金额: $ 44.41万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-15 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0337891&HistoricalAwards=false
• 关键词: Developing; Dry; Extraction; Ice; Core

This award supports the development of a new laboratory capability in the U.S. to measure CO2 in ice cores and investigate millennial-scale changes in CO2 during the last glacial period using samples from the Byrd and Siple Dome ice cores. Both cores have precise relative chronologies based on correlation of methane and the isotopic composition of atmospheric oxygen with counterpart records from Greenland ice cores. The proposed work will therefore allow comparison of the timing of CO2 change, Antarctic temperature change, and Greenland temperature change on common time scales. Such comparisons are vital for evaluating models that explain changes in atmospheric CO2. The techniques being developed will also be available for future projects, specifically the proposed Inland WAIS ice core, for which a highly detailed CO2 record is a major objective, and studies greenhouse and other atmospheric gases and their isotopic composition for which dry extraction is necessary (stable isotopes in CO2, for example). There are many broad impacts of the proposed work. Ice core greenhouse gas records are central contributions of paleoclimatology to research and policy-making concerning global change. The proposed work will enhance those contributions by improving our understanding of the natural cycling of the most important greenhouse gas. It will contribute to the training of a postdoctoral researcher, who will be an integral part of an established research group and benefit from the diverse paleoclimate and geochemistry community at OSU. The PI teaches major and non-major undergraduate and graduate courses on climate and global change. The proposed work will enrich those courses and the courses will provide an opportunity for the postdoctoral researcher to participate in teaching by giving guest lectures. The PI also participates in a summer climate workshop for high school teachers at Washington State University and the proposed work will enrich that contribution. The extraction device that is built and the expertise gained in using it will be resources for the ice core community and available for future projects. Data will be made available through established national data center and the equipment designs will also be made available to other researchers.

该奖项支持在美国开发一种新的实验室能力，以测量冰芯中的二氧化碳，并使用伯德和西普尔圆顶冰芯的样本调查末次冰期二氧化碳的千年尺度变化。 根据甲烷和大气氧同位素组成与格陵兰冰芯对应记录的相关性，两个冰芯都有精确的相对年代。 因此，拟议的工作将允许在共同的时间尺度上比较二氧化碳变化、南极温度变化和格陵兰温度变化的时间。 这种比较对于评估解释大气CO2变化的模型至关重要。 正在开发的技术也可用于未来的项目，特别是拟议的内陆WAIS冰芯，其主要目标是非常详细的CO2记录，并研究温室气体和其他大气气体及其同位素组成，其同位素组成需要干法提取（例如CO2中的稳定同位素）。 拟议的工作有许多广泛的影响。 冰芯温室气体记录是古气候学对全球变化研究和决策的重要贡献。 拟议的工作将增进我们对最重要的温室气体自然循环的了解，从而加强这些贡献。 它将有助于博士后研究人员的培训，他们将成为一个既定研究小组的组成部分，并从俄勒冈州立大学多样化的古气候和地球化学社区中受益。PI教授关于气候和全球变化的主要和非主要本科和研究生课程。拟议的工作将丰富这些课程，课程将提供一个机会，博士后研究人员参与教学，给予客座讲座。PI还参加了华盛顿州立大学的高中教师夏季气候研讨会，拟议的工作将丰富这一贡献。 建造的提取装置和使用该装置获得的专业知识将成为冰芯社区的资源，并可用于未来的项目。数据将通过已建立的国家数据中心提供，设备设计也将提供给其他研究人员。