Huang Wen-Min, Zhu Kong-Xian, Zhao Wei, Yu Bo-Shi, Yuan Xi-Gong, Feng Rui-Jie, Bi Yong-Hong, Hu Zheng-Yu
Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
Huan Jing Ke Xue. 2013 Apr;34(4):1270-6.
With the closed chamber and gas chromatography 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 Autumn. Results indicated that the fluxes of CO2, CH4 and N2O across the water-air interface showed an obvious diurnal variation. The absorption and emission process of CH4 showed strong diurnal variation during the experimental period, reaching the highest emission at 1 am, whereas CO2 and N2O were emitted all day. The fluxes of CO2 ranged from 20.1-97.5 mg x (m2 x h)(-1) at day and 32.7-42.5 mg x (m2 x h)(-1) at night, the fluxes of N2O ranged from 18.4-133.7 microg x (m2 x h)(-1) at day and 42.1-102.6 microg x (m2 x h)(-1) at night. The fluxes of CO2 had positive correlation with wind speed and negative correlation with pH. The fluxes of N2O had positive correlation with pH.
采用密闭箱-气相色谱法，对三峡水库香溪河湾秋季水-气界面温室气体通量进行了24小时连续监测。结果表明，水-气界面CO2、CH4和N2O通量呈现明显的日变化。实验期间CH4的吸收和排放过程日变化强烈，凌晨1点排放达到最高，而CO2和N2O全天均有排放。白天CO2通量范围为20.1-97.5 mg·(m2·h)-1，夜间为32.7-42.5 mg·(m2·h)-1；白天N2O通量范围为18.4-133.7 μg·(m2·h)-1，夜间为42.1-102.6 μg·(m2·h)-1。CO2通量与风速呈正相关，与pH呈负相关。N2O通量与pH呈正相关。
