Fluvial CO2 and CH4 in a lowland agriculturally impacted river network: Importance of local and longitudinal controls*
文献类型：期刊论文
| 作者 | Leng, Peifang1,2; Li, Zhao1,3; Zhang, Qiuying4; Li, Fadong1,3; Koschorreck, Matthias2 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2022-06-15 |
| 卷号 | 303页码:10 |
| 关键词 | Carbon dioxide Methane River network The North China Plain Longitudinal variation Agricultural streams |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2022.119125 |
| 通讯作者 | Li, Fadong(lifadong@igsnrr.ac.cn) |
| 英文摘要 | Despite streams and rivers play a critical role as conduits of terrestrially produced organic carbon to the atmosphere, fluvial CO2 and CH4 are seldom integrated into regional carbon budgets. High spatial variability hinders our ability to understand how local and longitudinal controls affect underlying processes of riverine CO2 and CH4 and challenge the prediction and upscaling across large areas. Here, we conducted a survey of fluvial CO2 and CH4 concentrations spanning multiple stream orders within an agriculturally impacted region, the North China Plain. We explored the spatial patterns of fluvial CO2 and CH4 concentrations, and then examined whether catchment and network properties and water chemical parameters can explain the variations in both carbon gases. Streams and rivers were systematically supersaturated with CO2 and CH4 with the mean concentrations being 111 and 0.63 mu mol L-1, respectively. Spatial variability of both gases was regulated by network properties and catchment features. Fluvial CO2 and CH4 declined longitudinally and could be modeled as functions of stream order, dissolved oxygen, and water temperature. Both models explained about half of the variability and reflected longitudinal and local drivers simultaneously, albeit CO2 was more local-influenced and CH4 more longitudinal-influenced. Our empirical models in this work contribute to the upscaling and prediction of CO2 and CH4 emissions from streams and rivers and the understanding of proximal and remote controls on spatial patterns of both gases in agriculturally impacted regions. |
| WOS关键词 | CARBON-DIOXIDE ; HEADWATER STREAMS ; ORGANIC-CARBON ; CLIMATE-CHANGE ; EMISSIONS ; METHANE ; DYNAMICS ; PATTERNS ; EVASION ; FLUXES |
| 资助项目 | National Natural Science Founda-tion of China[U1906219] ; National Natural Science Founda-tion of China[U2006212] ; National Natural Science Founda-tion of China[42007155] ; National Natural Science Founda-tion of China[41771292] ; Sino-German (CSC-DAAD) Postdoc Scholarship Program |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000782592500007 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Founda-tion of China ; Sino-German (CSC-DAAD) Postdoc Scholarship Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/174333]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Fadong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.UFZ Helmholtz Ctr Environm Res, Dept Lake Res, D-39114 Magdeburg, Germany 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 4.Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Leng, Peifang,Li, Zhao,Zhang, Qiuying,et al. Fluvial CO2 and CH4 in a lowland agriculturally impacted river network: Importance of local and longitudinal controls*[J]. ENVIRONMENTAL POLLUTION,2022,303:10. |
| APA | Leng, Peifang,Li, Zhao,Zhang, Qiuying,Li, Fadong,&Koschorreck, Matthias.(2022).Fluvial CO2 and CH4 in a lowland agriculturally impacted river network: Importance of local and longitudinal controls*.ENVIRONMENTAL POLLUTION,303,10. |
| MLA | Leng, Peifang,et al."Fluvial CO2 and CH4 in a lowland agriculturally impacted river network: Importance of local and longitudinal controls*".ENVIRONMENTAL POLLUTION 303(2022):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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