Collaborative Research: Mercury Oxidation Pathways in a Continental Atmosphere: High Temporal Resolution Measurements of Mercury and Oxidants at Storm Peak Laboratory

合作研究：大陆大气中的汞氧化途径：风暴峰实验室对汞和氧化剂的高时间分辨率测量

• 批准号: 1951514
• 负责人: Rainer Volkamer
• 金额: $ 62.08万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-03-15 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1951514&HistoricalAwards=false
• 关键词: Collaborative; Research; Mercury; Oxidation; Pathways

This project focuses on the study of atmospheric mercury. Mercury in the atmosphere exists in the gas-phase elemental form, as gas-phase oxidized mercury compounds, and bound to particles. The primary effort of this research will be on processes and mechanisms that govern oxidation reactions in the remote continental atmosphere. Mercury is a toxin that impacts neurological health and development in humans. A more thorough understanding of the atmospheric concentrations and chemical pathways of oxidized mercury is central to fully determining its fate. There are three objectives to this project: (1) Generate a high-quality dataset with accurate concentrations of elemental and oxidized mercury, halogen oxide radicals, aerosol size distribution, and other oxidants at a remote mountaintop site over the continental U.S.; (2) Identify the chemical mechanisms and physical processes that influence elemental and oxidized mercury in the free troposphere and the planetary boundary layer air masses; and (3) Bolster existing long-term measurements at Storm Peak Laboratory (e.g., to inform sources of new particle formation) and facilitate dialogue with researchers at other mountain observatories by sharing data analysis tools and expertise on best practices for sampling oxidized mercury, nanoparticles, and halogens from high elevation ground-based platforms.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.

该项目重点研究大气汞。大气中的汞以气相元素形式存在，作为气相氧化汞化合物，并与颗粒结合。这项研究的主要工作将是研究控制遥远大陆大气中氧化反应的过程和机制。汞是一种影响人类神经健康和发育的毒素。更彻底地了解氧化汞的大气浓度和化学途径对于完全确定其命运至关重要。该项目有三个目标：（1）生成高质量的数据集，其中包含美国大陆上偏远山顶地点的元素汞和氧化汞、卤氧化物自由基、气溶胶粒径分布和其他氧化剂的准确浓度； (2) 确定影响自由对流层和行星边界层气团中元素汞和氧化汞的化学机制和物理过程； (3) 支持 Storm Peak 实验室现有的长期测量（例如，告知新颗粒形成的来源），并通过分享数据分析工具和氧化汞、纳米颗粒采样最佳实践的专业知识，促进与其他山区观测站的研究人员的对话，以及来自高海拔地面平台的卤素。该奖项反映了 NSF 的法定使命，并且通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Observed in-plume gaseous elemental mercury depletion suggests significant mercury scavenging by volcanic aerosols

观察到的羽流内气态元素汞消耗表明火山气溶胶有显着的汞清除作用

• DOI: 10.1039/d3ea00063j
• 发表时间: 2024-09-13
• 期刊: Environmental Science: Atmospheres
• 作者: A. Koenig;O. Mag;C. Rose;A. Di Muro;Y. Miyazaki;A. Colomb;M. Rissanen;Christopher F. Lee;T. Koenig;R. Volkamer;J. Brioude;B. Verreyken;T. Roberts;B. Edwards;K. Sellegri;S. Arellano;P. Kowalski;A. Aiuppa;J. Sonke;A. Dommergue
• 通讯作者: A. Dommergue