| 广东省入库河口N2O分布和通量的时空变化 |
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| 引用本文： | 张晓萌,杨扬,蔡楠,刘旺,乔永民.广东省入库河口N2O分布和通量的时空变化[J].生态科学,2012(3):306-311. |
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| 作者姓名： | 张晓萌 杨扬 蔡楠 刘旺 乔永民 |
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| 作者单位： | 暨南大学水生生物研究所;热带亚热带水生态工程教育部工程研究中心;环境保护部华南环境科学研究所 |
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| 基金项目： | 国家重大科技专项(2009ZX07211-009,2008ZX07211-003) |
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| 摘 要： | 本研究于2011年7月(丰水期)和12月(枯水期)分别对广东省13个水库的入库河口进行调查,使用吹扫捕集-气相色谱法测定了水中N2O的浓度并用Liss&Merlivat公式估算出入库河口向大气释放N2O的水-气交换通量。结果表明,河口丰水期N2O溶存浓度范围为15.37～175.22 nmol/L,平均值为(73.77±43.58)nmol/L;N2O水-气交换通量范围为0.26～5.40μmol/(m2.d),平均值是(2.53±1.94)μmol/(m2.d)。河口枯水期N2O溶存浓度范围为44.26～366.11 nmol/L,平均值是(126.61±102.74)nmol/L;N2O水-气交换通量范围是0.86～21.88μmol/(m2.d),平均值是(7.50±6.65)μmol/(m2.d)。河口丰水期N2O溶存浓度和水-气交换通量明显低于枯水期。与其他研究相比,本研究区N2O溶存浓度和水-气交换通量偏低。
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| 关 键 词： | 河口 N2O 分布 通量 时空变化 |
Spatiotemporal variations of nitrous oxide distribution and flux in estuaries of Guangdong Province |
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| ZHANG Xiao-meng,YANG Yang,CAI Nan,LIU Wang,Qiao Yong-min.Spatiotemporal variations of nitrous oxide distribution and flux in estuaries of Guangdong Province[J].Ecologic Science,2012(3):306-311. |
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| Authors: | ZHANG Xiao-meng YANG Yang CAI Nan LIU Wang Qiao Yong-min |
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| Institution: | 1,3 1.Research Center of Hydrobiology,Jinan University,Guangzhou 510632,China;2.South China Institute of Environmental sciences of the Ministry of Environmental Protection,Guangzhou 510655,China;3.Ministry of Education Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering,Guangzhou 510632,China |
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| Abstract: | The concentrations and water-atmosphere fluxes of dissolved N2O were investigated in estuaries of 13 rivers of Guangdong Province during July(flooded season) and December(dry season),2011.N2O concentrations in the surface water were measured by purge and trap-gas chromatography,N2O water-atmosphere fluxes were estimated by Liss & Merlivat formula.The results demonstrated that dissolved N2O concentrations in the flooded season were 15.37-175.22 nmol/L,with an average of(73.77±43.58) nmol/L,N2O water-atmosphere fluxes in flooded season were 0.26-5.40 μmol/(m2.d),with an average of(2.53±1.94) μmol/(m2.d).While in dry season,N2O concentrations ranged from 44.26 nmol/L to 366.11 nmol/L,with an average of(126.61±102.74) nmol/L,N2O water-atmosphere fluxes ranged from 0.86 μmol/(m2.d) to 21.88 μmol/(m2.d),with an average of(7.50±6.65) μmol/(m2.d).N2O concentrations and water-atmosphere fluxes of flooded season were lower than those of dry season.Compared with other studies,the estuaries in this study had lower N2O concentrations and water-atmosphere fluxes. |
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| Keywords: | estuaries nitrous oxide distribution flux spatiotemporal variation |
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