1. [Diurnal changes in greenhouse gases at water-air interface of Xiangxi River in autumn and their influencing factors].
- Author
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Huang WM, Zhu KX, Zhao W, Yu BS, Yuan XG, Feng RJ, Bi YH, and Hu ZY
- Subjects
- Air analysis, China, Environmental Monitoring, Gases analysis, Nitric Oxide analysis, Rivers chemistry, Seasons, Water chemistry, Water Supply analysis, Air Pollutants analysis, Carbon Dioxide analysis, Greenhouse Effect, Methanol analysis, Water Pollutants, Chemical analysis
- Abstract
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.
- Published
- 2013