文章基本信息

标题：Temporal variation of methane flux from Xiangxi Bay of the Three Gorges Reservoir
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作者：Shangbin Xiao ; Defu Liu ; Yuchun Wang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
期号：1
DOI：10.1038/srep02500
语种：English
出版社：Springer Nature
摘要：Three diel field campaigns and one monthly sampling campaign during June 2010-May 2011 were carried out to investigate the CH₄ flux across the water-gas interface in Xiangxi Bay of the Three Gorges Reservoir, China. The average CH₄ flux was much less than that reported from reservoirs in tropic and temperate regions. The photosynthesis of phytoplankton dominated the diel gas fluxes during alga bloom in spring and summer. The maximum monthly flux occurred in June 2010 and corresponded to the lowest water level. Water temperature, sediment temperature, and TOC did not have significant correlation with the monthly CH₄ fluxes. Continuously decreasing hydrostatic pressure and the low water level resulted in more CH₄ emission at the sediment-water during the discharging period, and thus increases the CH₄ effluxes because the diffusion time through a thin water column is shorter and less CH₄ may be oxidized compared with that in a long water column.