RAPID: Characterizing the Sources and Chemistry of Nitrogen Oxides, Nitrous Acid, and Particulate Nitrate during the AEROMMA Campaign

在这个RAPID项目中，将对海洋源排放的氮氧化物（NOx）和亚硝酸盐（HONO）的同位素特征以及海洋和城市排放共同演变的羽流进行表征。稳定同位素技术与浓度测量相结合，将作为美国国家海洋和大气管理局支持的纽约地区超大城市到海洋地区大气排放和反应观测（AEROMMA）实地活动的一部分。这项研究将为评估纽约市大都市区臭氧和二次空气污染的有效缓解战略提供相关数据和信息。本研究中的稳定同位素组成测量将有助于利用与这些来源和过程相关的同位素特征来约束活性氮（Nr）的来源、汇和化学加工途径。现场工作将在两个地面站点进行：位于曼哈顿上城的纽约市立大学城市站点和位于康涅狄格州吉尔福德的耶鲁沿海站点，位于城市站点的下风。这项工作包括在不同气象和污染条件下，通过测量排放因子、浓度曲线和氮氧稳定同位素组成，对氮氧化物（NOx）、亚硝酸盐（HONO）、硝酸（HNO3）和硝酸盐颗粒（p-NO3-）进行表征和量化。这个项目包括一个研究生和一个本科生的参与。该奖项反映了美国国家科学基金会的法定使命，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。

In this RAPID project, the isotopic signatures of nitrogen oxides (NOx) and nitrous acid (HONO) emitted from marine sources and in plumes where marine and urban emissions co-evolve will be characterized. Stable isotope techniques in combination with concentration measurements will be employed as part of the NOAA-supported Atmospheric Emissions and Reactions Observed from Megacities to Marine Areas (AEROMMA) field campaign in the New York City region. This research will provide data and information relevant for assessing effective mitigation strategies for ozone and secondary air pollution over the greater metropolitan NYC area.The stable isotopic composition measurements in this research will help to constrain the sources, sinks, and chemical processing pathways of reactive nitrogen (Nr) species using the isotopic signatures associated with these sources and processes. Field work will be performed at two ground sites: the NYC-CUNY urban site located in Upper Manhattan and the Yale Coastal site in Guilford, CT located downwind of the urban site. This effort includes the characterization and quantification, under different meteorological and pollution conditions, of nitrogen oxides (NOx), nitrous acid (HONO), nitric acid (HNO3), and particulate nitrate (p-NO3-) through measurements of emission factors, concentration profiles, and nitrogen and oxygen stable isotopic composition in high time resolution. The project includes the participation of both a graduate and an undergraduate student.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.