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，将对海洋污染源排放的氮氧化物(NOx)和亚硝酸(HONO)以及海洋和城市排放共同演变的羽流中的氮氧化物(NOx)和亚硝酸(HONO)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，将作为美国国家海洋和大气局支持的从超大城市到海洋区域观测到的大气排放和反应(AEROMMA)实地活动的一部分。这项研究将为评估有效缓解大都会地区臭氧和二次空气污染的策略提供相关数据和信息。这项研究中稳定的同位素组成测量将有助于利用与这些源和过程相关的同位素特征来限制活性氮(Nr)物种的源、汇和化学加工路径。实地工作将在两个地面站点进行：位于曼哈顿上城的NYC-CUNY城市站点和位于城市站点下风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，通过高时间分辨率测量排放因子、浓度分布以及氮和氧的稳定同位素组成，表征和量化氮氧化物(NOx)、亚硝酸(HONO)、硝酸(HNO3)和颗粒态硝酸盐(p-NO3-)。该项目包括一名研究生和一名本科生参加。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势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.