Seasonal and diurnal variations in N(2)O concentrations and fluxes from three eutrophic rivers in Southeast China
文献类型：SCI/SSCI论文
| 作者 | Yang L. B. ; Yan W. J. ; Ma P. ; Wang J. N. |
| 发表日期 | 2011 |
| 关键词 | nitrous oxide concentration and flux eutrophic river seasonal and diurnal variations nitrous-oxide n2o transfer velocity seine river emissions denitrification estuary nitrification oxygen sediment patterns |
| 英文摘要 | This study was performed at three eutrophic rivers in Southeast China aiming to determine the magnitude and patterns of dissolved N(2)O concentrations and fluxes over a seasonal (in 2009) and diurnal (24 h) temporal scale. The results showed that N(2)O concentrations varied from 0.28 to 0.38 (mean 0.32 +/- 0.04), 0.29 to 0.46 (mean 0.37 +/- 0.07), and 2.07 to 3.47 (mean 2.84 +/- 0.63) mu g N-N(2)O L(-1) in the Fengle, Hangbu and Nanfei rivers, respectively, in the diurnal study performed during the summer of 2008. The study found that mean N(2)O concentration and estimated N(2)O flux (67.89 +/- 6.71 mu g N-N(2)O m(-2) h(-1)) measured from the Nanfei River with serious urban wastewater pollution was significantly higher than those from the Fengle and the Hangbu Rivers with agricultural runoff. In addition, the seasonal study during June and December of 2009 also showed that the mean N(2)O concentration (10.59 +/- 14.67 mu g N-N(2)O L(-1)) and flux (236.87 +/- 449.74 mu g N-N(2)O m(-2) h(-1)) observed from the Nanfei River were significantly higher than those from the other two rivers. Our study demonstrated both N(2)O concentrations and fluxes exhibited seasonal and diurnal fluctuations. Over three consecutive days during the summer of 2008, N(2)O accumulation rates varied within the range of 3.91-7.21, 2.76-15.71, and 3.23-30.03 mu g N-N(2)O m(-2) h(-1) for the Fengle, Hangbu and Nanfei Rivers, respectively, and exponentially decreased with time. |
| 出处 | Journal of Geographical Sciences |
| 卷 | 21 |
| 期 | 5 |
| 页 | 820-832 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1009-637X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22592]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Yang L. B.,Yan W. J.,Ma P.,et al. Seasonal and diurnal variations in N(2)O concentrations and fluxes from three eutrophic rivers in Southeast China. 2011. |
入库方式： OAI收割
来源：地理科学与资源研究所
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