中文摘要：

近十年来，人工水库是否是温室气体重要来源在国际学术界存在很大争议。本研究为调查中国东北地区两座人工水库水体中溶解二氧化碳分压的分布状况，于2010年7月对丰满水库和镜泊湖水库水体二氧化碳分压（p（CO2））进行了走航观测。结果表明，丰满水库、镜泊湖水库表层二氧化碳分压均较低，分别为8～17Pa和2-19Pa。在对这两座水库剖面分析时发现，随着水深的增加，二氧化碳分压急剧增大，在7-10m处达到最大值。丰满水库、镜泊湖水库夏季二氧化碳分压主要受藻类光合作用的控制。扩散通量计算结果表明，这两座水库减缓了入库河流二氧化碳的净排放，但水库下泄水可能是CO2释放的重要通道。

英文摘要：

In the last decade, a great controversy arose up on whether artificial reservoir is an importance source of greenhouse gases. In this study, the distribution of carbon dioxide in two reservoirs in Northeast China was investigated in July 2010. The results showed that, the partial pressure of carbon dioxide were very low in the surface water of Fengman and Jingbohu reservoirs, with the values of 8-17 Pa and 2-19 Pa respectively. Along the water column of these two reservoirs, the partial pressure of carbon dioxide （p（CO2）） increases downward, and the maximum value ofp（CO2） was detected at the depth of 7 10 m. The quite low value ofp（CO2） in the surface water of these reservoirs revealed the strong aquatic photosynthesis in euphotic layer. Base on flux calculation, it is clear that surface water of these two reservoirs had a role to mitigate the emissions of carbon dioxide compared with that in the inflow rivers. However, discharged water from the reservoirs may be an important channel for CO2 release.