Collaborative Research: Development of Tunable Infrared Laser Direct Absorption Spectroscopy (TILDAS) for clumped isotope analysis of CO2

合作研究：开发用于 CO2 聚集同位素分析的可调谐红外激光直接吸收光谱 (TILDAS)

• 批准号: 1649986
• 负责人: Katharine Huntington
• 金额: $ 0.44万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1649986&HistoricalAwards=false
• 关键词: Collaborative; Research; Development; Tunable; Infrared

This project is enabling the University of Arizona, University of Washington, and private sector partner Aerodyne Research to develop a next-generation laser spectroscopy system to measure combinations of carbon and oxygen isotopes that are known as "clumped isotopes." The new technology will enable researchers to study the earth's past climate at lower cost, with smaller sample sizes, and in greater numbers than is currently possible by mass spectrometry. The new instrument will make possible a large increase in the number of proxy measurements of past earth temperatures because it eliminates the need for separate estimates of oxygen isotopes. Such a system is expected to be adopted quickly by laboratories around the world for application to geologic, oceanographic, biologic, and atmospheric samples. This project links the University of Arizona and the University of Washington with Aerodyne Research in improving the precision of Aerodyne's Tunable Infrared Laser Direct Absorption Spectroscopy (TILDAS) system to make clumped isotope measurements of carbon dioxide that are competitive with current techniques using mass spectrometry. The key measurement is of the different isotopic combinations of carbon dioxide, such as carbon 13, oxygen 18, and oxygen 16. The ability to analyze samples that are 30 to 80 times smaller means that higher spatial resolution can be obtained to allow research into better time resolution such as that afforded by seasonally-banded shells. Other research opportunities include the ability to study soil processes and Holocene paleoclimate using layered soil carbonates from the Andes and northwestern US; seasonality and carbon cycle during the Early Eocene Climatic Optimum and Cretaceous greenhouse from lake and soil carbonates; and the detailed history of fluid-fault interactions, cross cutting relationships and multiple fluids preserved in calcite veins from paleo and active fault zones and hydrothermal systems.

该项目正在使亚利桑那大学，华盛顿大学和私营部门合作伙伴Aerdodne Research开发下一代激光光谱系统，以测量被称为“团块同位素的碳和氧同位素的组合”。这项新技术将使研究人员能够以较低的成本研究地球过去的气候，其样本量较小，而且数量较大，而质谱法的数量要大。新仪器将使过去地球温度的代理测量数量大大增加，因为它消除了对氧同位素单独估计的需求。预计世界各地的实验室将迅速采用这种系统，以应用于地质，海洋学，生物学和大气样品。该项目将亚利桑那大学和华盛顿大学与Aerodyne研究联系起来，以提高Aerodyne的可调红外激光直接吸收光谱（TILDAS）系统的精确度，以使二氧化碳二氧化碳的同位素测量与当前技术相结合的同位素测量。关键的测量是二氧化碳的不同同位素组合，例如碳13，氧18和氧16。分析较小30至80倍的样品的能力意味着可以获得较高的空间分辨率，可以使较高的空间分辨率可以允许进行更好的时间分辨率，例如由季节性散发贝壳提供的较高时间分辨率。其他研究机会包括使用来自安第斯山脉和西北部的分层土壤碳酸盐来研究土壤过程和全新世的能力；始新世早期气候最佳和白垩纪温室中的季节性和碳循环来自湖泊和土壤碳酸盐；以及流体过失相互作用，交叉切割关系和多种流体的详细历史记录，这些液体保存在古细胞和活性断层区和热液系统中。