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Research advances and applications on oxygen isotope anomaly in atmospheric nitrate.

DONG Xin-yuan1,2, GUO Qing-jun1,3*, WEI Rong-fei1, TAO Zheng-hua1,2, TIAN Li-yan1   

  1. (1State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China).
  • Online:2020-03-10 Published:2020-03-10

Abstract: In recent years, increasing atmospheric nitrate resulted from anthropogenic activities negatively affects human health and ecological environment. It is important to identify the sources and formation mechanisms of nitrate. As a powerful tracer, the multi-oxygen stable isotopes in nitrate are widely used for investigations of aerosol, aquatic ecosystems, soils, forests, and paleoclimate. In this review, experimental methods and causes of oxygen isotope anomaly (Δ17O) in atmospheric nitrate are introduced, and the tracing mechanisms of Δ17O are discussed according to the differences of nitrate formation processes. Finally, the applications of Δ17O are reviewed in the studies of atmospheric chemical reaction mechanism. According to the progress and problems in literature, we proposed the future directions of the researches on Δ17O in nitrate.