Laboratory of Global Marine and Atmospheric Chemistry, School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK.
Philos Trans R Soc Lond B Biol Sci. 2013 May 27;368(1621):20130115. doi: 10.1098/rstb.2013.0115. Print 2013 Jul 5.
Atmospheric organic nitrogen (ON) appears to be a ubiquitous but poorly understood component of the atmospheric nitrogen deposition flux. Here, we focus on the ON components that dominate deposition and do not consider reactive atmospheric gases containing ON such as peroxyacyl nitrates that are important in atmospheric nitrogen transport, but are probably not particularly important in deposition. We first review the approaches to the analysis and characterization of atmospheric ON. We then briefly summarize the available data on the concentrations of ON in both aerosols and rainwater from around the world, and the limited information available on its chemical characterization. This evidence clearly shows that atmospheric aerosol and rainwater ON is a complex mixture of material from multiple sources. This synthesis of available information is then used to try and identify some of the important sources of this material, in particular, if it is of predominantly natural or anthropogenic origin. Finally, we suggest that the flux of ON is about 25 per cent of the total nitrogen deposition flux.
大气有机氮（ON）似乎是大气氮沉降通量中普遍存在但尚未被充分了解的组成部分。在这里，我们主要关注主导沉降的大气有机氮成分，而不考虑含有大气有机氮的反应性大气气体，如过氧酰基硝酸盐，这些气体在大气氮传输中很重要，但在沉降中可能不是特别重要。我们首先回顾了大气有机氮的分析和特性研究方法。然后，我们简要总结了来自世界各地的大气气溶胶和雨水有机氮浓度的现有数据，以及对其化学特性的有限信息。这些证据清楚地表明，大气气溶胶和雨水有机氮是来自多种来源的复杂混合物。然后，我们利用这些现有信息的综合分析来尝试确定这些物质的一些重要来源，特别是如果它主要来自自然或人为来源。最后，我们认为大气有机氮的通量约占总氮沉降通量的 25%。
