EAGER: Development of a Novel Double-resonance Fiber-laser-induced Fluorescence Instrument for Long-term, High-sensitivity, Interference-free Measurements of Hydroxyl Radical (OH)

EAGER：开发新型双共振光纤激光诱导荧光仪器，用于长期、高灵敏度、无干扰地测量羟基自由基 (OH)

• 批准号: 1625380
• 负责人: Frank Keutsch
• 金额: $ 4.3万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-02-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1625380&HistoricalAwards=false
• 关键词: EAGER; Development; Novel; Double; resonance

This project focuses on the development of a novel method for measuring ambient hydroxyl radicals (OH) in the atmosphere, based on the use of infra-red, ultra-violet, laser-induced fluorescence (IR-UV LIF). The project is a collaborate effort with scientists in the laboratory of Professor Dr. Andreas Wahner, Director of the Institute for Energy and Climate Research at Forschungszentrum Jülich (FZJ) in Germany. Previous fundamental studies on this method have found that it is highly sensitive and free from chemical interferences, but its use has been restricted to physical-chemistry laboratories due to limitations associated with maintaining the stability of the laser in the field. The scientists will explore the coupling of a highly selective spectroscopic method to the latest advances in fiber laser technology for the development of a novel OH LIF instrument.The hydroxyl radical is the most important oxidizing species in the atmosphere. It reacts with many chemical species in air, oxidizing them and serving as a cleansing mechanism for the ultimate removal of important trace gases such as air pollutants and greenhouse gases. The novel method being developed is expected eventually to be adapted worldwide for field use, enabling long-term measurements of the hydroxyl radical. The resulting data will be critical for improving models of air quality and climate change.

该项目的重点是在Atmospires Ed，Ultra-Violet，激光诱导的荧光（IR-UV LIF）中开发环境羟基自由基（OH）。在德国的OrschungszentrumJülich（FZJ）先前的基本研究。新型Ohlif仪器的作用。羟基是大气中最重要的氧化物种，将其氧化为清洁，以清除机械式机械措施，以消除重要的痕迹，例如育儿和温室气体。在全球范围内，适用于现场使用羟基自由基。