Seasonal changes of dissolved organic matter chemistry and its linkage with greenhouse gas emissions in saltmarsh surface water and porewater interactions
文献类型：期刊论文
| 作者 | Liang, Wenzhao1; Chen, Xiaogang2; Zhao, Chen1; Li, Ling2; He, Ding1,3,4 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2023-10-15 |
| 卷号 | 245页码:10 |
| 关键词 | Saltmarsh Dissolved organic matter Optical properties Excitation-emission matrix Greenhouse gas Porewater exchange |
| ISSN号 | 0043-1354 |
| DOI | 10.1016/j.watres.2023.120582 |
| 英文摘要 | Dissolved organic matter (DOM) is one of the largest reactive reservoirs of carbon on earth. Saltmarshes play an essential role in shaping the fate of DOM and greenhouse gas (GHG) production in surface water and ground-water interactions in coastal areas. However, the coupling mechanism between DOM and GHG production is poorly understood. In this study, DOM in both surface water and porewater were analyzed by 3D excitation-emission-matrix spectroscopy under different seasonal and tidal conditions in a saltmarsh. Protein-like DOM was likely to produce CH4, while humic-like DOM tended to produce CO2. CH4 concentration was highly enriched in porewater because increasing fresh groundwater flow introduced small-sized protein-like DOM. Based on the mass balance model, >98.5% of CH4 was oxidated to CO2 in sediment-water interface. The degradation of sediment-derived DOC (especially humic-like DOM) contributes similar to 80% of the total amount of CO2 in surface water. Both hydrodynamics and chemical reactions are suggested to influence greenhouse gas (GHG) emissions. Hydrodynamics (e.g., tidal pumping) are controlling factors in short timescales (hourly/weekly) while chemical reactions become crucial in influencing DOM chemistry and related degradation rate on seasonal scales. These findings emphasize the importance of the coupling mechanism at different time scales between DOM characteristics and GHG emissions in saltmarshes. |
| 资助项目 | National Natural Science Foundation of China[42222061] ; National Natural Science Foundation of China[41973070] ; National Natural Science Foundation of China[42006152] ; Hong Kong RGC General Research Fund[26300822] ; State Key Laboratory of Geomechanics and Geotechnical Engineering[SKLGME022008] ; Center for Ocean Research in Hong Kong and Macau (CORE) ; Hong Kong PhD Fellowship Scheme (HKPFS) from Hong Kong RGC |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001080904800001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39681]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Ling; He, Ding |
| 作者单位 | 1.Hong Kong Univ Sci & Technol, Ctr Ocean Res Hong Kong & Macau, Dept Ocean Sci, Hong Kong, Peoples R China 2.Westlake Univ, Sch Engn, Key Lab Coastal Environm & Resources Zhejiang Prov, Hangzhou, Peoples R China 3.City Univ Hong Kong, State Key Lab Marine Pollut, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liang, Wenzhao,Chen, Xiaogang,Zhao, Chen,et al. Seasonal changes of dissolved organic matter chemistry and its linkage with greenhouse gas emissions in saltmarsh surface water and porewater interactions[J]. WATER RESEARCH,2023,245:10. |
| APA | Liang, Wenzhao,Chen, Xiaogang,Zhao, Chen,Li, Ling,&He, Ding.(2023).Seasonal changes of dissolved organic matter chemistry and its linkage with greenhouse gas emissions in saltmarsh surface water and porewater interactions.WATER RESEARCH,245,10. |
| MLA | Liang, Wenzhao,et al."Seasonal changes of dissolved organic matter chemistry and its linkage with greenhouse gas emissions in saltmarsh surface water and porewater interactions".WATER RESEARCH 245(2023):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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