Spatio-temporal variations of carbon dioxide and its gross emission regulated by artificial operation in a typical hydropower reservoir in China
文献类型：期刊论文
| 作者 | Li, Zhe1,2 ; Zhang, Zengyu1; Xiao, Yan2; Guo, Jinsong2; Wu, Shengjun2; Liu, Jing1
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| 刊名 | ENVIRONMENTAL MONITORING AND ASSESSMENT
 |
| 出版日期 | 2014-05-01 |
| 卷号 | 186期号:5页码:3023-3039 |
| 关键词 | CO2 Gross emission Chlorophyll a Reservoir operation Three Gorges Reservoir |
| ISSN号 | 0167-6369 |
| DOI | 10.1007/s10661-013-3598-0 |
| 通讯作者 | Li, Z (reprint author), Chongqing Univ, Coll Urban Construct & Environm Engn, 83 Shabeijie St,Campus B, Chongqing 400045, Peoples R China. |
| 英文摘要 | Supersaturation and excess emission of greenhouse gases in freshwater reservoirs have received a great deal of attention in recent years. Although impoundment of reservoirs has been shown to contribute to the net emission of greenhouse gases, reservoir age, geographical distribution, submerged soil type and artificial regulation also have a great impact on their emissions. To examine how large scale reservoir operation impact the water column CO2 and its air-water interface flux, a field study was conducted in 2010 to evaluate potential ecological processes that regulate the partial pressure of CO2 (pCO(2)) in the water column in the Pengxi River backwater area (PBA), a typical tributary in the Three Gorges Reservoir, China. Measurements of total alkalinity (TA), pH and water temperature were applied to compute the pCO(2). And this approach was also validated by calculation of pCO(2) from the dissolved inorganic carbon data of samples. Partial least squares (PLS) regression was used to determine how the dynamics of the water pCO(2) were related to the available variables. The estimated pCO(2) in our sample ranged from 26 to 4,087 mu atm in the surface water. During low water operation from July to early September, there was an obvious pCO(2) stratification, and pCO(2) in the surface was almost unsaturated. This phenomenon was also observed in the spring bloom during discharge period. Conversely, there was no significant pCO(2) stratification and the entire water column was supersaturated during high water operation from November to the following February. Significant correlation was observed between the magnitude of pCO(2), DOand chlorophyll a, suggesting that phytoplankton dynamics regulate pCO(2) in the PBA. The average areal rate of CO2 emissions from the Pengxi River ranged from 18.06 to 48.09 mmol m(-2) day(-1), with an estimated gross CO2 emission from the water surface of 14-37 t day(-1) in this area in 2010. Photosynthesis and respiration rates by phytoplankton might be the dominant processes that regulated pCO(2) in the water column. We conclude that pCO(2) values in the surface water of Pengxi River could be regarded as potential sources of CO2 to the atmosphere were smaller or similar to those that have been reported for many other reservoirs to date. |
| 资助项目 | National Natural Science Foundation[51009155] ; National Natural Science Foundation[51179215] ; Western Action Research Program granted by Chinese Academy of Science[KZCX2-XB3-14] ; Chongqing Natural Science Program[CSTC2012JJB20004] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000333801200030 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/1088]  |
| 专题 | 水质生物转化研究中心 生态过程与重建研究中心 |
| 通讯作者 | Li, Zhe |
| 作者单位 | 1.Chongqing Univ, Coll Urban Construct & Environm Engn, Chongqing 400045, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhe,Zhang, Zengyu,Xiao, Yan,et al. Spatio-temporal variations of carbon dioxide and its gross emission regulated by artificial operation in a typical hydropower reservoir in China[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2014,186(5):3023-3039. |
| APA | Li, Zhe,Zhang, Zengyu,Xiao, Yan,Guo, Jinsong,Wu, Shengjun,&Liu, Jing.(2014).Spatio-temporal variations of carbon dioxide and its gross emission regulated by artificial operation in a typical hydropower reservoir in China.ENVIRONMENTAL MONITORING AND ASSESSMENT,186(5),3023-3039. |
| MLA | Li, Zhe,et al."Spatio-temporal variations of carbon dioxide and its gross emission regulated by artificial operation in a typical hydropower reservoir in China".ENVIRONMENTAL MONITORING AND ASSESSMENT 186.5(2014):3023-3039. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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