EAGER: The Presence of a Clumped Isotope Signal in Atmospheric Carbon Monoxide (CO)

EAGER：大气一氧化碳 (CO) 中存在聚集同位素信号

• 批准号: 1927950
• 负责人: John Mak
• 金额: $ 29.65万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-05-01 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1927950&HistoricalAwards=false
• 关键词: EAGER; Presence; Clumped; Isotope; Signal

This EAGER project is a high risk, high reward project to measure an isotope of carbon monoxide never before measured in the atmosphere. It is theorized that this particular isotopic anomaly may be used as a tracer to assess the chemical reactivity of the atmosphere. Chemical reactivity in the atmosphere differs depending on the season, the amount of sunlight, and other factors. This project will measure, for the first time, the 'doubly substituted' isotopologue of atmospheric carbon monoxide 13C18O (31CO). The study will quantify the 31CO signal in atmospheric CO during different seasons, corresponding to different hydroxyl radical (OH) abundances, by collecting air samples from a mid-latitude, coastal site along the east coast of North America. Laboratory studies will also be conducted to determine the temperature dependence of 13C18O abundance. This project may find application in paleoatmospheric studies, as a parallel goal of the project is the evaluation of whether this signal is conserved in Holocene and Pleistocene-age polar ice.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个急切的项目是一个高风险，高奖励项目，可以测量从未在大气中测量的一氧化碳同位素。 理论上认为，这种特定的同位素异常可以用作评估大气化学反应性的示踪剂。 大气中的化学反应性取决于季节，阳光的量和其他因素。该项目将首次测量大气一氧化碳13C18O（31CO）的“双重取代”同位素学。 这项研究将在不同季节中量化大气中的31C信号，与不同的羟基自由基（OH）丰度相对应，通过收集北美东海岸的沿海地点的空气样本。 还将进行实验室研究以确定13C18O丰度的温度依赖性。 该项目可能会在佩奇米圈研究中找到应用，作为该项目的平行目的是评估该信号是否在全新世和更新世时代的极地冰中保存。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。