Preliminary report on methane emissions from the Three Gorges Reservoir in the summer drainage period

查看全文 作　　者：Fei [1]Lu;Le [1,2]Yang;Xiaoke [1]Wang;Xiaonan [3]Duan;Yujing [4]Mu;Wenzhi [1]Song;Feixiang [1]Zheng;Junfeng [1,2]Niu;Lei [1,2]Tong;Hua [1]Zheng;Yongjuan [1]Zhou;Jiangxiao [1,2]Qiu;Zhiyun [1]Ouyang

机构地区：[1]State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;[2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China;[3]General Office of Chinese Academy of Sciences, Beijing 100864, China;[4]Laboratory of Atmospheric Chemistry and Air Pollution Control Techniques, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

出　　处：《Journal of Environmental Sciences》索引2011年第23卷第12期,共5页

基　　金：supported by the National Natural Science Foundation of China (No. 50809067);the National Basic Research Program (973) of China (No.2010CB955904-03);the Chinese Academy of Sciences for Strategic Priority Research Program (No.XDA05060102, XDA05050602) 摘　　要：Recently reported summertime methane (CH4) emissions (6.7 ± 13.3 mg CH4/(m2·hr)) from newly created marshes in the drawdown area of the Three Gorges Reservoir (TGR), China have triggered broad concern in academic circles and among the public. The CH4 emissions from TGR water surfaces and drawdown areas were monitored from 3rd June to 16th October 2010 with floating and static chambers and gas chromatography. The average CH4 emission flux from permanently flooded areas in Zigui, Wushan and Yunyang Counties was (0.33 ± 0.09) mg CH4/(m2·hr). In half of these hottest months of the year, the wilderness, cropland and deforested drawdown sites were aerobic and located above water level, and the CH4 emissions were very small, ranging from a sink at 0.12 mg CH4/(m2·hr) to a source at 0.08 mg CH4/(m2·hr) except for one mud-covered site after flood. Mean CH4 emission in flooded drawdown sites was 0.34 mg CH4/(m2·hr). The emissions from the rice paddy sites in the drawdown area were averaged at (4.86 ± 2.31) mg CH4/(m2·hr). Excepting the rice-paddy sites, these results show much lower emission levels than previously reported. Our results indicated considerable spatial and temporal variation in CH4 emissions from the TGR. Human activities and occasional events, such as flood, may also affect emission levels. Long-term CH4 measurements and modeling in a large region are necessary to accurately estimate greenhouse gas emissions from the TGR. 关键词：甲烷排放量三峡库区夏季水期温室气体排放排放水平三峡水库 CH4

相关文献

参考文献（12）
引证文献（13）
耦合文献（3）

参考文献(12)

引证文献(13)

耦合文献(3)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Preliminary report on methane emissions from the Three Gorges Reservoir in the summer drainage period

参考文献(12)

引证文献(13)

耦合文献(3)

用户提示