AGS-PRF: Constraining Ammonia Emission Sources in Urban Areas Utilizing Nitrogen Stable Isotopes

在美国，产生和中和气溶胶的氨排放正在增加。虽然肥料使用产生的农业氨来源占主导地位，并得到了充分的研究，但实地研究表明，在目前的模型中，城市地区使用化石燃料产生的氨代表性不足。这可能是由于在车辆和发电厂中使用各种催化氮氧化物洗涤技术，以减少可能增加氨产量的空气污染，特别是在城市地区。该提案将使用同位素特定的氨测量来量化罗德岛州、印第安纳波利斯和费城的化石燃料相关来源。研究结果将有助于确定化石能源的使用和污染减排技术如何影响城市氨源和人类健康。该研究将使用同位素（15N/14N）研究来开发指纹识别工具，用于汽车发动机、发电厂、催化NOx洗涤器、农业和海洋来源的化石氨。将在普罗维登斯、印第安纳波利斯和罗德岛进行实地研究，利用氨的15N/14N观测值定量地确定氨的来源。最先进的仪器将用于测量，结果将解决关于化石燃烧对氨预算的贡献有多大以及催化NOx洗涤器技术如何影响它们的悬而未决的争论。

Ammonia emissions that produce and neutralize aerosols are increasing in the US . While the agricultural ammonia sources from fertilizer use dominate and are well studied, field studies show that ammonia produced from fossil fuel use in urban areas is underrepresented in current models. This may be a result of the use of various catalytic NOx scrubber technologies in vehicles and power-plants to reduce air pollution that can increase ammonia production, particularly in urban areas. The proposal will use isotope specific ammonia measurements to quantify the fossil fuel related sources in Rhode Island, Indianapolis and Philadelphia. The results will help determine how fossil energy use and and pollution abatement technologies are affecting urban ammonia sources and human health.The research will use isotopic (15N/14N) studies to develop fingerprinting tools for fossil ammonia sources from automobile engines, power plants, and catalytic NOx scrubbers, agricultural and oceanic sources. Field studies in Providence, Indianapolis, and Rhode Island will be performed to quantitatively attribute the ammonia sources using the 15N/14N observations of ammonia. State of the art instrumentation will be used for the measurements and the results will resolve the outstanding debate on how much fossil combustion is contributing to the ammonia budget and how catalytic NOx scrubber technologies are affecting them.