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DOI | 10.1021/acs.est.3c09508 |
Enhanced Role of Streamflow Processes in the Evolutionary Trends of Dissolved Organic Carbon | |
Wu, Jiefeng; Yao, Huaxia | |
发表日期 | 2024 |
ISSN | 0013-936X |
EISSN | 1520-5851 |
起始页码 | 58 |
结束页码 | 10 |
卷号 | 58期号:10 |
英文摘要 | Investigating dissolved organic carbon (DOC) dynamics and drivers in rivers enhances the understanding of carbon-environment linkages and support sustainability. Previous studies did not fully consider the dynamic nature of key drivers that influence the long-term changing trends in DOC concentration over time (the controlling factors and their roles in DOC trend can undergo alterations over time). We analyzed 42 years (1979-2018) of hydrometeorology, sulfate SO4, and DOC data from a 5.42 km(2) watershed in central-southern Ontario, Canada. Our findings reveal a significant (p <= 0.01) overall increase in DOC concentrations, mainly due to the coevolution of SO4 and streamflow trends, especially the extreme flows. Over the 42-year period, the changing trend of streamflow (especially the extreme high or low flows) have significantly (p < 0.05) intensified their influence on DOC trends, increasing by an average of 30%. Conversely, the impact of SO4 has weakened, experiencing an average decrease of 32.6%. The upward trend in the annual average DOC concentration is attributed to the increasing number of maximum flow days within a year, while the decreasing trend in the number of minimum flow days has a contrasting effect. In other words, changes in maximum and minimum flow days have a counteracting effect on the DOC concentration trends. These results underscore the importance of considering the effects of altered streamflow processes on carbon cycle changes under evolving environmental conditions. |
英文关键词 | DOC; trends; streamflow; SO4; coevolution; extremes |
语种 | 英语 |
WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
WOS类目 | Engineering, Environmental ; Environmental Sciences |
WOS记录号 | WOS:001179262700001 |
来源期刊 | ENVIRONMENTAL SCIENCE & TECHNOLOGY |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/296939 |
作者单位 | Nanjing University of Information Science & Technology; Nanjing University of Information Science & Technology |
推荐引用方式 GB/T 7714 | Wu, Jiefeng,Yao, Huaxia. Enhanced Role of Streamflow Processes in the Evolutionary Trends of Dissolved Organic Carbon[J],2024,58(10). |
APA | Wu, Jiefeng,&Yao, Huaxia.(2024).Enhanced Role of Streamflow Processes in the Evolutionary Trends of Dissolved Organic Carbon.ENVIRONMENTAL SCIENCE & TECHNOLOGY,58(10). |
MLA | Wu, Jiefeng,et al."Enhanced Role of Streamflow Processes in the Evolutionary Trends of Dissolved Organic Carbon".ENVIRONMENTAL SCIENCE & TECHNOLOGY 58.10(2024). |
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