香溪河库湾夏季温室气体通量及影响因素分析  

Fluxes of Greenhouse Gases from Xiangxi River in Summer and Their Influencing Factors

作　　者：王亮[1] 肖尚斌[1] 刘德富[1] 陈文重[1] 王雨春[2] 陈小燕[1] 段玉杰[1] 

机构地区：[1]三峡大学水利与环境学院,宜昌443002 [2]中国水利水电科学研究院,北京100038

出　　处：《环境科学》2012年第5期1471-1475,共5页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2010CB955904);国家自然科学基金项目(51179205);国家水体污染控制与治理科技重大专项(2009ZX07104-001;2008ZX07104-004);湖北省环境保护专项(2008hb08)

摘　　要：采用LGR-密闭式动态通量箱法对三峡水库香溪河库湾夏季水-气界面温室气体(CO2和CH4)通量进行了24 h连续观测.结果表明,观测点处水-气界面CO2和CH4的释放通量具有明显的日变化特征,且二者的日变化过程呈较强的负相关性.监测期间,CO2的吸收和释放过程明显,CH4全天均为释放状态,其全天平均通量分别为0.336 mg.(m2.h)-1和0.088mg.(m2.h)-1.分析发现,水-气界面碳通量与温度、pH、叶绿素a、气压、辐照强度的相关性明显,而Eh对碳通量的影响并不显著,其中,CO2与各环境因子的相关性较CH4更为密切.With the LGR-Airtight Floating Dynamic Flux Chamber method,a 24-hour continuous monitoring was carried out to understand the greenhouse gases fluxes across the water-air interface of the Xiangxi River Bay,the Three-Gorges Reservoir in summertime.It indicated that the fluxes of CO2 and CH4 across the water-air interface appeared an obvious diurnal variation,and they showed a good negative correlation.The absorption and emission process of CO2 showed strong diurnal alteration during the experimental period,whereas CH4 was emitted all day.The average fluxes of CO2 and CH4 were 0.336 mg·（m2·h）-1 and 0.088 mg·（m2·h）-1,respectively.The fluxes of carbon had good correlation with temperature,pH,chlorophyll a,air-pressure,light intensity,but no obvious correlation with Eh.Furthermore,the correlation of CO2 with environment factors was better than that of CH4.

关 键 词：水-气界面 温室气体通量 影响因素 三峡水库 香溪河库湾 

分 类 号：X144[环境科学与工程—环境科学]