大气硝酸盐中氮氧稳定同位素研究进展  

Review of the Study on the Stable Isotopes of Nitrogen and Oxygen in Atmospheric Nitrate

作　　者：秦瑞 史贵涛 陈振楼[1] Qin Rui;Shi Guitao;Chen Zhenlou(Key Laboratory of Geographic Information Science Ministry of Education,School of Geographic Sciences,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学地理科学学院地理信息科学教育部重点实验室,上海200241

出　　处：《地球科学进展》2019年第2期124-139,共16页Advances in Earth Science

基　　金：国家自然科学基金项目"东南极冰盖中山站至昆仑站断面雪层中NO3的沉积后机制研究:δ15N;δ18O和Δ17O证据"(编号:41576190)资助~~

摘　　要：受人类活动和工农业快速发展的影响,大气硝酸盐(NO_3^-)污染越来越严重且已成为世界范围内的环境问题之一。探究大气NO_3^-的稳定同位素组成(δ15N,δ18O和Δ17O),可以为深入理解大气氮循环、有效控制大气NO_3^-污染提供有力依据。综述了目前大气NO_3^-不同来源NOx的δ15N值、NO_3^-的δ15N季节变化特征及主要影响因素,总结了大气中不同氧化剂的δ18O值和Δ17O值,归纳了全球范围内部分大气NO_3^-中δ18O值和Δ17O值的时空分布特征及可能影响因素,回顾了NO_3^-同位素分析测试技术的主要进展,在前期工作基础上提出未来大气NO_3^-稳定同位素研究应更多关注NO_3^-的氧化生成机制(不同类型氧化剂同位素组成时空差异)、不同NOx来源的δ15N组成、借助化学模型开展大气NO_3^-循环过程等方面的研究。Due to the emissions from intensive human activities and rapid development of industry and agriculture,atmospheric nitrate(NO3^-) contamination is becoming more serious and now is a worldwide environmental problem. The isotopic compositions of NO3^-(δ^15 N,δ^18 O and Δ^17 O)can deliver more information than the concentration alone,i.e.,the nitrogen and oxygen isotopes can suggest the sources of NO3^- and oxidation capability of the atmosphere,providing a powerful tool for investigating atmospheric nitrogen cycling and atmospheric NO3^- pollution control. The δ^15 N of different sourced NO3^- in the atmosphere,as well as the seasonal variation of δ^15 N(NO3^-)and the associated mechanisms were reviewed. In addition,the oxygen isotopes of various oxidants and NO3^-(δ^18 O and Δ^17 O) in the atmosphere were summarized,and the global distribution patterns of the oxygen isotopes of NO3^- were discussed. Lastly,the available analysis techniques of isotopic compositions of NO3^- were reviewed. Based on the research progress of NO3^- isotopes in the atmosphere,it was suggested that further investigations should focus on measuring the isotopic compositions of oxidants and NOx from different sources,characterizing the production mechanisms of NO3^-,as well as investigating chemical recycling between NOx and NO3^- with the aid of atmospheric chemical models.

关 键 词：大气 硝酸盐 稳定同位素 

分 类 号：P593[天文地球—地球化学] X51[天文地球—地质学]