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首页> 外文会议>2013 Third International Conference on Intelligent System Design and Engineering Applications. >Research of Greenhouse Gases (CH4 and CO2) Emission Flux in Baiyangdian Wetland
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Research of Greenhouse Gases (CH4 and CO2) Emission Flux in Baiyangdian Wetland

机译：白洋淀湿地温室气体（CH4和CO2）排放通量的研究

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CH4 and CO2 are important greenhouse gases, playing a very important role in greenhouse effect. In order to estimate the current situation of source and sink of main greenhouse gases in Baiyangdian wetland and evaluate the influences of wetland system to the greenhouse effect of North China, static closed chamber-gas chromatogram method was adopted to study the space-time variation characteristics of N2O, CH4, and CO2 emission fluxes in Baiyangdian wetland. The analysis results indicate: the lake wetland which was abundant in organic matters and nutritive salt was an important greenhouse gases emission source. During one year of observation, it was found out that the fluxes of N2O, CH4, and CO2 of Baiyangdian wetland posses a very high time variability, with the range of variation being-0.08~0.33 mg•m-2•h-1, -5.40~328.65 mg•m-2•h-1 and -814.06~2934.93 mg•m-2•h-1. The emission fluxes of N2O, CH4, and CO2 reaches to maximum in summer, respectively being 62.09%, 92.15% and 87.04% of the annual total emission flux, The lakeside was a core area of N2O, CH4 emission, with annual average emission flux respectively reaching up to 0.11 mg•m-2•h-1 and 40.86 mg•m-2•h-1. Although the main emission area of CO2 was land, the emission flux of lakeside, with annual average emission flux being 692.35 mg•m-2•h-1, was also very high, ranking only second to land, the lakeside area of Baiyangdian wetland was only 12.60% of the whole lake wetland area, but the emission loads of N2O, CH4, and CO2 were respectively 26.51%, 43.96% and 23.76% of the total emission load, which explains that the lakeside was leading the greenhouse gases emission of Baiyangdian wetland.
机译：CH4和CO2是重要的温室气体，在温室效应中起着非常重要的作用。为了估算白洋淀湿地主要温室气体的源，汇现状，评估湿地系统对华北地区温室效应的影响，采用静态密闭室-气相色谱法研究时空变化特征。白洋淀湿地N2O，CH4和CO2排放通量变化分析结果表明：湖泊湿地有机物和营养盐含量丰富，是重要的温室气体排放源。在一年的观测中，发现白洋淀湿地的N2O，CH4和CO2通量具有很高的时间变化性，变化范围为-0.08〜0.33 mg•m-2•h-1， -5.40〜328.65 mg•m-2•h-1和-814.06〜2934.93 mg•m-2•h-1。夏季N2O，CH4和CO2的排放通量达到最大值，分别占年总排放通量的62.09％，92.15％和87.04％。湖畔是N2O，CH4排放的核心区域，年均排放通量分别达到0.11 mg•m-2•h-1和40.86 mg•m-2•h-1。尽管CO2的主要排放区域是陆地，但湖边的排放通量也很高，年平均排放通量为692.35 mg•m-2•h-1，仅次于陆地，仅次于白洋淀湿地的湖边仅占湖湿地总面积的12.60％，但N2O，CH4和CO2的排放负荷分别占总排放负荷的26.51％，43.96％和23.76％，这说明湖边是该湖区温室气体排放的主导。白洋淀湿地。

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