Measurements of Hydrogen Oxide (HOx) Radical Chemistry Above and Below the Forest Canopy

森林冠层上方和下方的氧化氢 (HOx) 自由基化学测量

• 批准号: 1827450
• 负责人: Philip Stevens
• 金额: $ 76.62万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1827450&HistoricalAwards=false
• 关键词: Measurements; Hydrogen; Oxide; HOx; Radical

This project will improve understanding of the influence of forest emissions on the production of ozone in the atmosphere. Currently, atmospheric chemistry models tend to overpredict the concentration of ozone in forested environments. Atmospheric radicals, such as the hydroxyl radical (OH), play an important role in the chemistry of the atmosphere and in the production of ozone. This project includes additional measurements and modeling of atmospheric radicals to improve the understanding of atmospheric chemistry and for improving models that predict the production of ozone and fine particulates in the atmosphere.The following questions regarding the measurement and modeling of HOx radicals in forested environments will be addressed: (1) What is the source of the interference associated with measurements of OH radical concentrations in forest environments and can it be minimized? (2) How well do we understand the sources, sinks, and recycling of HOx radicals in forest environments? and (3) How does below canopy radical chemistry and transport impact the above canopy environment?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.

该项目将提高人们对森林排放对大气中臭氧产生的影响的了解。 目前，大气化学模型往往高估森林环境中的臭氧浓度。 大气自由基，如羟基自由基（OH），在大气化学和臭氧的产生中起着重要作用。 该项目包括大气自由基的额外测量和建模，以提高对大气化学的理解，并改进预测大气中臭氧和细颗粒物产生的模型。（1）森林环境中OH自由基浓度测量的干扰源是什么？(2)我们对森林环境中HOx自由基的来源、汇和再循环有多了解？（3）冠层下自由基化学和传输对冠层上环境有何影响？该奖项反映了NSF的法定使命，并被认为是值得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的支持。

项目成果

Development of a laser-photofragmentation laser-induced fluorescence instrument for the detection of nitrous acid and hydroxyl radicals in the atmosphere

• DOI: 10.5194/amt-14-6039-2021
• 发表时间: 2021-09-16
• 期刊: ATMOSPHERIC MEASUREMENT TECHNIQUES
• 影响因子: 3.8
• 作者: Bottorff, Brandon;Reidy, Emily;Stevens, Philip S.
• 通讯作者: Stevens, Philip S.