Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sources
Study Region: This study is conducted in the southeastern coastal city of Fuzhou, China. Study Focus: Carbon emissions have significantly increased under the rapid urbanization. Wet deposition (rainwater) serves as a major sink for atmospheric organic carbon (OC) and acts as a potential source of di...
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Elsevier
2025-04-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581825001247 |
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| author | Qing Ma Jie Zeng Qixin Wu Wanfa Wang Shijun Mao Zixuan Liu Jingwen Chen Zhiheng Ma Zhong-Jun Wang Xinyi He Jie Zhang Xin Ge |
| author_facet | Qing Ma Jie Zeng Qixin Wu Wanfa Wang Shijun Mao Zixuan Liu Jingwen Chen Zhiheng Ma Zhong-Jun Wang Xinyi He Jie Zhang Xin Ge |
| author_sort | Qing Ma |
| collection | DOAJ |
| description | Study Region: This study is conducted in the southeastern coastal city of Fuzhou, China. Study Focus: Carbon emissions have significantly increased under the rapid urbanization. Wet deposition (rainwater) serves as a major sink for atmospheric organic carbon (OC) and acts as a potential source of dissolved organic carbon (DOC) in the Earth’surface. This study aims to clarify the status, variations, sources, and deposition flux in rainwater DOC in coastal urban hotspot area, in order to enhance the understanding of atmospheric OC in coastal area. New Hydrological Insights for the Region: The analysis revealed that the rainwater DOC volume-weighted mean (VWM) concentration during the study period was 1.77 mg C L-¹ , with an associated deposition flux of 2.02 g C m-² yr-¹ . The dilution effect of continuous precipitation affects the rainwater DOC concentrations. In addition, the concentration of rainwater DOC in Fuzhou was influenced by atmospheric OC from long-distance migration and local inputs. Characteristic ion ratios and positive matrix decomposition (PMF) model revealed that anthropogenic emissions driven by industrial activities, fossil fuel burning, and traffic contribute 93.7 % to rainwater DOC. The estimation of atmospheric wet deposition contributed 1.82 × 105 t yr−1 of OC to Taiwan Strait, dominating the external DOC input with a proportion of 67 %. This work gained insights into the wet deposition process of atmospheric OC in coastal cities and underscored the importance of this process in the global carbon cycle. |
| format | Article |
| id | doaj-art-7f63b7bf2fa34592a4b229ff3da7d6ac |
| institution | DOAJ |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-7f63b7bf2fa34592a4b229ff3da7d6ac2025-08-20T02:57:47ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-04-015810230010.1016/j.ejrh.2025.102300Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sourcesQing Ma0Jie Zeng1Qixin Wu2Wanfa Wang3Shijun Mao4Zixuan Liu5Jingwen Chen6Zhiheng Ma7Zhong-Jun Wang8Xinyi He9Jie Zhang10Xin Ge11Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China; North Alabama International College of Engineering and Technology, Guizhou University, Guiyang 550025, China; Corresponding author at: Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China.Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China; North Alabama International College of Engineering and Technology, Guizhou University, Guiyang 550025, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaNorth Alabama International College of Engineering and Technology, Guizhou University, Guiyang 550025, ChinaNorth Alabama International College of Engineering and Technology, Guizhou University, Guiyang 550025, ChinaFujian Key Laboratory of Mineral Resources, Fuzhou University, Fuzhou 350108, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaSchool of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China; Corresponding author.Study Region: This study is conducted in the southeastern coastal city of Fuzhou, China. Study Focus: Carbon emissions have significantly increased under the rapid urbanization. Wet deposition (rainwater) serves as a major sink for atmospheric organic carbon (OC) and acts as a potential source of dissolved organic carbon (DOC) in the Earth’surface. This study aims to clarify the status, variations, sources, and deposition flux in rainwater DOC in coastal urban hotspot area, in order to enhance the understanding of atmospheric OC in coastal area. New Hydrological Insights for the Region: The analysis revealed that the rainwater DOC volume-weighted mean (VWM) concentration during the study period was 1.77 mg C L-¹ , with an associated deposition flux of 2.02 g C m-² yr-¹ . The dilution effect of continuous precipitation affects the rainwater DOC concentrations. In addition, the concentration of rainwater DOC in Fuzhou was influenced by atmospheric OC from long-distance migration and local inputs. Characteristic ion ratios and positive matrix decomposition (PMF) model revealed that anthropogenic emissions driven by industrial activities, fossil fuel burning, and traffic contribute 93.7 % to rainwater DOC. The estimation of atmospheric wet deposition contributed 1.82 × 105 t yr−1 of OC to Taiwan Strait, dominating the external DOC input with a proportion of 67 %. This work gained insights into the wet deposition process of atmospheric OC in coastal cities and underscored the importance of this process in the global carbon cycle.http://www.sciencedirect.com/science/article/pii/S2214581825001247RainwaterDissolved organic carbonSource apportionmentFlux and influenceFuzhou |
| spellingShingle | Qing Ma Jie Zeng Qixin Wu Wanfa Wang Shijun Mao Zixuan Liu Jingwen Chen Zhiheng Ma Zhong-Jun Wang Xinyi He Jie Zhang Xin Ge Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sources Journal of Hydrology: Regional Studies Rainwater Dissolved organic carbon Source apportionment Flux and influence Fuzhou |
| title | Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sources |
| title_full | Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sources |
| title_fullStr | Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sources |
| title_full_unstemmed | Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sources |
| title_short | Dissolved organic carbon of rainfall in coastal urban hotspot area, southeast China: Variations, determinants, and sources |
| title_sort | dissolved organic carbon of rainfall in coastal urban hotspot area southeast china variations determinants and sources |
| topic | Rainwater Dissolved organic carbon Source apportionment Flux and influence Fuzhou |
| url | http://www.sciencedirect.com/science/article/pii/S2214581825001247 |
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