Evidence for organic N deposition and its anthropogenic sources in China
Evidence for organic N deposition and its anthropogenic sources in China
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中国有机氮沉降及其人为来源的证据
DOI：
10.1016/j.atmosenv.2007.12.015
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发表时间：
2008-02
影响因子：
5
通讯作者：
Goulding, Keith
中科院分区：
文献类型：
--
作者：
Zhang, Ying;Liu, Xuejun;Jickells, Tim;Zheng, Lixia;Fangmeier, Andreas;Cape, John Neil;Zhang, Fusuo;Goulding, Keith
有机氮（N）是大气沉降活性氮的重要组成部分，但其来源基本上未知。评估这种溶解的有机氮 (DON) 是天然的、人为的还是混合来源的，对于确定人类对全球氮循环的扰动程度至关重要。在这里，我们报告了中国大气有机氮沉降及其人为来源的证据。 2005年至2006年对15个农村、郊区和城市的降水样品进行了采集和分析。DON平均沉积量为8.6kgha−1yr−1，体积加权浓度为111μmolL−1，远高于世界其他地区。 DON 对总溶解氮 (TDN) 的贡献平均约为 30%，与文献中其他报道的数据非常吻合。纯湿沉积和大量沉积的平行收集显示湿沉积平均为 68%，表明有显着的干沉积成分。结合中国和世界其他地方的数据，DON 与 NH4-N、NO3-N 和 TDN 之间的显着相关性 (p<0.0001) 表明，大气有机氮的来源与溶解无机氮 (DIN)（NH4-N 和 NO3-N）相似，这在很大程度上归因于农业和工业来源的人为排放。
Organic nitrogen (N) is an important component of the atmospheric deposition of reactive N, but its sources are essentially unknown. Assessing whether this dissolved organic N (DON) is of natural, anthropogenic or mixed origin is critically important in attempting to determine the scale of human perturbation of the global N cycle. Here we report evidence for atmospheric organic N deposition and its anthropogenic sources in China. Precipitation samples were collected and analyzed from 15 rural, suburban and urban sites during 2005 and 2006. The average deposition of DON was 8.6kgha−1yr−1with a volume-weighted concentration of 111μmolL−1, which was much higher than in other regions of the world. The contribution of DON to total dissolved N (TDN) was approximately 30% on average, agreeing well with other reported data in the literature. Parallel collections of wet-only and bulk deposition showed wet deposition to be 68% on average, indicating a significant dry deposition component. Combining data from the Chinese sites with those from elsewhere in the world, significant (p<0.0001) correlations between DON and NH4–N, NO3–N and TDN suggest that atmospheric organic N originates from similar sources to dissolved inorganic N (DIN) (NH4–N and NO3–N), which are largely attributed to anthropogenic emissions from both agricultural and industrial sources.
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DOI：
--
发表时间：
1999-06
期刊：
AMBIO: A Journal of the Human Environment
影响因子：
--
作者：
H. Paerl;D. Whitall
通讯作者：
H. Paerl;D. Whitall
影响因子：
--
作者：
Ying Zhang;Xuejun Liu;Fusuo Zhang;X. Ju;G. Zou;K. Hu
通讯作者：
Ying Zhang;Xuejun Liu;Fusuo Zhang;X. Ju;G. Zou;K. Hu
影响因子：
5
作者：
W. Keene;J. Montag;J. Maben;M. Southwell;J. Leonard;T. Church;J. Moody;J. Galloway
通讯作者：
W. Keene;J. Montag;J. Maben;M. Southwell;J. Leonard;T. Church;J. Moody;J. Galloway
影响因子：
--
作者：
K. Mace;N. Kubilay;R. Duce
通讯作者：
K. Mace;N. Kubilay;R. Duce
影响因子：
6.6
作者：
He, Chun-E.;Liu, Xuejun;Zhang, Fusuo
通讯作者：
Zhang, Fusuo