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

在这个快速项目中，将对海洋排放源和海洋与城市排放共同演变的羽流中排放的氮氧化物和亚硝酸的同位素特征进行表征。稳定同位素技术与浓度测量相结合，将作为国家海洋和大气管理局支持的“从特大城市到海洋地区观测大气排放和反应”实地活动的一部分，在纽约市区域使用。这项研究将提供相关的数据和信息，以评估有效的缓解策略，臭氧和二次空气污染的大都市NYC地区。在这项研究中的稳定同位素组成测量将有助于限制源，汇，和化学处理途径的活性氮（Nr）物种使用与这些源和过程相关的同位素签名。现场工作将在两个地面站点进行：位于上曼哈顿的NYC-CUNY城市站点和位于城市站点下风处的康涅狄格州吉尔福德的耶鲁海岸站点。这项工作包括在不同的气象和污染条件下，通过测量排放因子、浓度分布以及高时间分辨率的氮和氧稳定同位素组成，对氮氧化物（NOx）、亚硝酸（HONO）、硝酸（HNO 3）和颗粒硝酸盐（p-NO3-）进行表征和量化。该项目包括一名研究生和一名本科生的参与。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。

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.