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.

该项目着重于大气汞的研究。大气中的汞以气相元素形式存在，作为气相氧化的汞化合物，并与颗粒结合。这项研究的主要努力将取决于控制偏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展的毒素。对氧化汞的大气浓度和化学途径的更全面了解对于完全确定其命运至关重要。该项目有三个目标：（1）在美国大陆的偏远山顶地点生成具有准确浓度的元素和氧化汞，卤素氧化物自由基，气溶胶尺寸分布以及其他氧化剂的高质量数据集； （2）确定在自由对流层和行星边界层空气质量中影响元素和氧化汞的化学机制和物理过程； （3）通过共享数据分析工具和对氧化的汞，纳米颗粒的氧化度，通过基于地面的高位奖励，通过共享氧化的汞，纳米颗粒和卤素，通过共享数据分析和对对话，可以通过共享氧化的汞和halogs。基金会的智力优点和更广泛的影响评论标准。

项目成果

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

• DOI: 10.1039/d3ea00063j
• 发表时间: 2023
• 期刊: Environmental Science: Atmospheres
• 作者: A. Koenig;O. Magand;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