Atmospheric nitrous oxide: patterns of global change during recent decades and centuries.
Atmospheric nitrous oxide: patterns of global change during recent decades and centuries.
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DOI：
10.1016/s0045-6535(01)00297-1
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发表时间：
2002-06
期刊：
影响因子：
8.8
通讯作者：
M. Khalil;R. Rasmussen;M. J. Shearer
中科院分区：
文献类型：
--
作者：
M. Khalil;R. Rasmussen;M. J. Shearer
提供了从1981年到1996年底全球一氧化二氮每周测量的数据。结果表明，北方半球的N2 O含量比南极高0.7±0.04 ppbv，北极与南极的差异约为1.2±0.1 ppbv。受大陆空气影响的地点的浓度高于海洋地点，表明存在大量陆地排放。在研究期间，N2 O的平均增长率约为0.6 ppbv/年（约0.2%/年），尽管有些时期的增长率有很大差异。利用冰芯数据，可以将大约1000年前的N2 O记录放在一起。它显示工业化前的水平约为287±1 ppbv，而在上个世纪，浓度现已上升约27 ppbv或9.4%。冰芯数据显示，N2 O仅在世纪开始增加。这里提供的数据全面反映了目前全球N2 O的分布情况及其历史和近期趋势。
Data from weekly global measurements of nitrous oxide from 1981 to the end of 1996 are presented. The results show that there is more N2O in the northern hemisphere by about 0.7±0.04 ppbv, and the Arctic to Antarctic difference is about 1.2±0.1 ppbv. Concentrations at locations influenced by continental air are higher than at marine sites, showing the existence of large land-based emissions. For the period studied, N2O increased at an average rate of about 0.6 ppbv/year (∼0.2%/year) although there were periods when the rates were substantially different. Using ice core data, a record of N2O can be put together that goes back about 1000 years. It shows pre-industrial levels of about 287±1 ppbv and that concentrations have now risen by about 27 ppbv or 9.4% over the last century. The ice core data show that N2O started increasing only during the 20th century. The data presented here represent a comprehensive view of the present global distribution of N2O and its historical and recent trends.