地球科学进展 ›› 2012, Vol. 27 ›› Issue (3): 268 -275. doi: 10.11867/j.issn.1001-8166.2012.03.0268

综述与评述 上一篇    下一篇

杨志 1,陈敏 1,2   
  1. 1. 厦门大学海洋学系,福建厦门361005;2.厦门大学近海海洋环境科学国家重点实验室,福建厦门361005
  • 收稿日期:2011-11-30 修回日期:2012-01-05 出版日期:2012-03-10
  • 通讯作者: 陈敏(1970-),男,广东韶关人,教授,主要从事同位素海洋化学研究 E-mail:mchen@xmu.edu.cn
  • 基金资助:


Progress in Nitrogen and Oxygen Isotopic Composition of Nitrate in Seawater

Yang Zhi 1, Chen Min 1,2   

  1. 1. Department of Oceanography, Xiamen University, Xiamen361005, China; 2. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen361005, China
  • Received:2011-11-30 Revised:2012-01-05 Online:2012-03-10 Published:2012-03-10


Marine nitrogen cycle plays a key role in marine biogeochemical cycles, which has its impacts on the structure and function of regional and global marine ecosystem, and is  closely related to global climate change. Nitrogen and oxygen isotopes   of nitrate reflect the major nitrogen transformation processes in the ocean, and become important tools in the study of marine nitrogen cycle. In this paper, we summarized recent progresses in the analysis of nitrogen and oxygen isotopes of nitrate in seawater, the isotopic fractionations during the major nitrogen cycling processes, i.e. assimilation of nitrogen nutrients, nitrification, denitrification, dinitrogen fixation, and their application in marine nitrogen studies. The distribution of nitrogen and oxygen isotopes of nitrate within marine ecosystems can provide a record of the sources of nitrogen supporting biological production and the major pathways and mechanisms moving nitrogen through different pools. Current challenge for successful use of nitrogen and oxygen isotopes of nitrate in resolving nitrogen cycle fluxes and processes requires an analytical advance, an accurate construction of nitrogen budget, and a further understanding of processes affecting nitrogen and oxygen isotopes in the upper ocean. The spatial and temporal variation in the isotopic composition of nitrate requires a sampling extension among global oceans, especially in China marginal seas with little data now.


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