| 关于对流层大气N2O氮、氧稳定同位素负荷平衡的初步探讨 |
| 摘要点击 1648 全文点击 1933 投稿时间：1998-12-02 |
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| 中文关键词 N2O 氮氧稳定同位素负荷 全球源汇 对流层 平流层回流 |
| 英文关键词 N2O nitrogen and oxygen isotope budget global sources and sinks troposphere returned N2O from stratosphere |
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| 中文摘要 |
| 对流层大气N2O的氮、氧稳定同位素负荷由地表和海洋释放的富轻同位素的N2O与平流层回流的富重同位素的N2O来平衡,但Kim和Craig的计算方案无法使之平衡[1].笔者根据全球N2O释放源最近的年释放量估算值,对Kim和Craig[1]的计算方案进行了初步改进,在考虑土壤N2O生成过程中氮、氧稳定同位素的分馏效应和氧同位素的纬度变化效应后,推论出全球N2O释放源最近的年释放量估算值能使对流层大气N2O氮、氧稳定同位素负荷分别接近于平衡。并提出验证该推论的未来研究方向。 |
| 英文摘要 |
| In steady state,the nitrogen and oxygen isotope budgets from the global N2O sources which are uniformly depleted in heavy isotopes and isotopically lighter than the tropospheric N2O are balanced respectively to the returned N2O from stratosphere enriched in the heavy isotopes.Kim and Craig(1993)[1] failed to make their estimated results balance.This paper improves Kim and Graigs estimation method based upon global N2O sources and their emissions updated.When considering isotopic fractionation effects during N2O producing in soils and the latitude effect for nitrogen and oxygen isotopic ratios of N2O,the results can make nitrogen and oxygen isotopes budget of tropospheric N2O approximately balance.Furthermore,this paper puts forward future studies which can validate above results. |
