The Impact of Peroxyacyl Nitrates on the Isolation and Transport of NOx in the Rural Midwest Troposphere

过氧酰基硝酸盐对中西部农村对流层中 NOx 分离和传输的影响

• 批准号: 9616438
• 负责人: Steven Bertman
• 金额: $ 32.3万
• 依托单位: Western Michigan University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-02-15 至 2002-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9616438&HistoricalAwards=false
• 关键词: Impact; Peroxyacyl; Nitrates; Isolation; Transport

9616438 Bertman Peroxyacyl nitrates (PANs) are a major component of total oxidized nitrogen in the atmosphere. More effort is needed to understand their formation, loss and distribution, as well as their impact on local, regional, and global atmospheric chemistry. Measurements of PANs can be sensitive probes of regional influence and of global issues related to pollutant transport. In this project, a dedicated and automated analytical instrument system for measurement of tropospheric PAN and its analogs will be constructed, installed, and operated at the University of Michigan Biological Station (UMBS) located near Pellston, Michigan. PANs will be measured using automated gas chromatography with electron capture detection. The UMBS site allows investigating many questions regarding atmospheric ozone chemistry in the Midwest. Air masses reaching this site are transported either from rural areas or from the industrial/metropolitan areas in the south. The project will have a strong collaborative component since it will be co-located with measurements of ozone, carbon monoxide, nitrogen oxides, organic nitrates, isoprene, carbonyls, meteorological parameters, etc., performed by other scientists. These comprehensive measurements will also allow detailed speciation of reactive nitrogen. The PAN measurements will contribute towards a better understanding of the seasonal fluctuations of nitrate photoproducts, the mechanism of isoprene photochemistry during different seasons, and the photochemical and transport mechanisms that result in the observed species distributions.

小行星9616438 过酰基硝酸盐（PANs）是大气中总氮氧化物的主要成分。需要更多的努力来了解它们的形成，损失和分布，以及它们对当地，区域和全球大气化学的影响。PANs的测量可以灵敏地探测区域影响和与污染物传输相关的全球问题。 在这个项目中，一个专用的和自动化的分析仪器系统测量对流层PAN及其类似物将建造，安装，并在密歇根州Pellston附近的密歇根大学生物站（UMBS）运行。将使用自动气相色谱法和电子捕获检测器测量PAN。 UMBS站点允许调查关于中西部大气臭氧化学的许多问题。到达该地点的气团来自农村地区或南部的工业/大都市地区。 该项目将有一个强有力的合作组成部分，因为它将与臭氧、一氧化碳、氮氧化物、有机硝酸盐、异戊二烯、羰基化合物、气象参数等的测量放在同一地点，由其他科学家完成。这些全面的测量也将允许详细的活性氮的形态。PAN测量将有助于更好地了解硝酸盐光产物的季节性波动，异戊二烯光化学在不同季节的机制，以及导致所观察到的物种分布的光化学和运输机制。