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: 1951632
• 负责人: Anna Gannet Hallar
• 金额: $ 23.15万
• 依托单位: University of Utah
• 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 2023-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1951632&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.

该项目的重点是大气汞的研究。大气中的汞以气相元素形式存在，即气相氧化汞化合物，并与颗粒结合。这项研究的主要努力将是在遥远的大陆大气中的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。更透彻地了解氧化汞在大气中的浓度和化学途径，对于充分确定其最终归宿至关重要。该项目有三个目标：（1）生成一个高质量的数据集，其中包含美国大陆偏远山顶站点的元素汞和氧化汞、卤素氧化物自由基、气溶胶粒度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;以及（3）支持风暴峰实验室现有的长期测量（例如，该奖项反映了NSF的法定使命，并通过使用基金会的知识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

Seasonal significance of new particle formation impacts on cloud condensation nuclei at a mountaintop location

• DOI: 10.5194/acp-22-15909-2022
• 发表时间: 2022-12
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Noah S. Hirshorn;Lauren M. Zuromski;Christopher N. Rapp;I. McCubbin;Gerardo Carrillo-Cardenas;F. Yu;A. Hallar