Large spatiotemporal shifts of CO2 partial pressure and CO2 degassing in a monsoonal headwater stream
文献类型：期刊论文
| 作者 | Luo, Jiachen1,2; Li, Siyue1 ; Ni, Maofei1,2; Zhang, Jing1,3
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| 刊名 | JOURNAL OF HYDROLOGY
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| 出版日期 | 2019-12-01 |
| 卷号 | 579页码:10 |
| 关键词 | Carbon degassing The Yangtze River Partial pressure of CO2 Spatial-temporal variation Water-air gas exchange |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2019.124135 |
| 通讯作者 | Li, Siyue(syli2006@163.com) |
| 英文摘要 | Carbon dioxide (CO2) emissions from rivers are a vital part of the global carbon budget. However, data from subtropical areas, especially in the headwater streams, are scare. Spatiotemporal dynamics and drives of partial pressure of CO2 (pCO(2)) and water-air CO2 fluxes (FCO2) in a monsoonal headwater stream Jinshui River of the Yangtze were unraveled. Our findings suggested that natural process (i.e., hydrology, CO2 outgassing and lithology) and human activities were recognized as significant players in regulating the variability of riverine pCO(2). The mean pCO(2) was significantly higher in the dry season (1562 +/- 975 mu atm) than the wet season (834 +/- 639 mu atm), seasonal trends of pCO(2) were controlled by in situ biogenic activities and rainfall events. The slight fluctuations of pCO(2) from upstream to downstream along main stem implied the mixed influences of distinct water environments and anthropogenic disturbance. Correlation analysis showed that environmental factors, i.e., temperature, pH, TN and DOC were relevant to pronounced spatial and seasonal variability of pCO(2). We highlighted that high water-air CO2 flux was estimated at 343 +/- 413 mmol/m(2/)d (dry: 542 +/- 477 mmol/m(2/)d vs wet: 192 +/- 278 mmol/m (2/)d) in the monsoonal headwater stream, and the watershed-scale carbon budget demonstrated carbon loss via atmospheric exchange was 1.2 times the riverine dissolved carbon export. Our results would fill a large gap in the headwater stream of the Yangtze, and help to accurately estimate the regional to global CO2 outgassing from rivers to the atmosphere. |
| 资助项目 | Natural Science Foundation of China[31670473] ; Key Program of the Chinese Academy of Sciences[ZDRW-ZS-2016-7-2] ; 100-Talent Program of the Chinese Academy of Sciences, China |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000500371200006 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/10021]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Li, Siyue |
| 作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Ecohydrol, Chongqing 400714, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Southwest Univ, Coll Resources & Environm, Chongqing 400716, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Jiachen,Li, Siyue,Ni, Maofei,et al. Large spatiotemporal shifts of CO2 partial pressure and CO2 degassing in a monsoonal headwater stream[J]. JOURNAL OF HYDROLOGY,2019,579:10. |
| APA | Luo, Jiachen,Li, Siyue,Ni, Maofei,&Zhang, Jing.(2019).Large spatiotemporal shifts of CO2 partial pressure and CO2 degassing in a monsoonal headwater stream.JOURNAL OF HYDROLOGY,579,10. |
| MLA | Luo, Jiachen,et al."Large spatiotemporal shifts of CO2 partial pressure and CO2 degassing in a monsoonal headwater stream".JOURNAL OF HYDROLOGY 579(2019):10. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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