Changes in Dissolved Inorganic Carbon Across Yangtze River Regulated by Dam and River-Lake Exchange
文献类型：期刊论文
| 作者 | Zhao, Chu1; Wang, Chuan1; Li, Jianhong1,2; Meng, Lize1; Xue, Jingya1; Gao, Yang3; Huang, Tao1; Bai, Yixin1; Li, Shuaidong1; Yang, Hao1 |
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 37期号:9页码:19 |
| 关键词 | dissolved inorganic carbon stable isotope hydrological recharge Three Gorges Dam Yangtze River |
| ISSN号 | 0886-6236 |
| DOI | 10.1029/2023GB007749 |
| 通讯作者 | Huang, Changchun(huangchangchun_aaa@163.com) |
| 英文摘要 | The boom in dam construction and continuous river-lake exchange has had a profound impact on the transmission and transformation of riverine dissolved inorganic carbon (DIC). An in-depth understanding of the change mechanisms of DIC concentrations and sources driven by dam operation and lake recharge is crucial for regulating greenhouse gas emissions and evaluating the impact of DIC on the global carbon cycle. This study investigated dam- and lakes-driven DIC via the concentration and delta C-13 of DIC, combined with anions, cations, delta D and delta O-18 in the main stream of the Yangtze River. DIC showed a decreasing trend from upper reach (2,262.31 +/- 113.69 mu mol kg(-1)) to lower reach (1,771.61 +/- 89.36 mu mol kg(-1)). Carbonate dissolution proportion (from 36.45% to 28.44%) and atmospheric CO2 proportion (from 37.51% to 22.94%) of DIC decreased from upper reach to lower reach, whereas soil CO2 proportion of DIC (from 26.01% to 48.63%) increased. The control of dam operation on DIC biogeochemical process was revealed from different time scales. From the perspective of short-term seasonal changes (from 2020 to 2021), the mineralization of organic matter in the dry season strengthened CO2 degassing and calcite precipitation, reducing the DIC and increasing the proportion of soil CO2. Meanwhile, longer periods of runoff retention provided sufficient time for water-rock reactions in the wet season and increased the DIC and carbonate dissolution source in the reservoir area. On a long-term scale (from 2009 to 2021), a decrease in pH driven by sediment mineralization contributed to an annual increase in DIC in the reservoir. The flow of lakes mixed into the mainstream was revealed by the enrichment of delta O-18, and river-communicating recharge decreased the DIC and carbonate dissolution source. We show that dam operation and lake inflow change DIC concentrations and sources and therefore need to be considered in the transmission and transformation processes of DIC in the river-ocean continuum. |
| WOS关键词 | 3 GORGES RESERVOIR ; STABLE ISOTOPIC COMPOSITION ; ORGANIC-CARBON ; MISSISSIPPI RIVER ; NITROGEN BURIAL ; MAJOR ELEMENTS ; WATER ; FLUXES ; CHANGJIANG ; CYCLE |
| 资助项目 | National Natural Science Foundation of China[BE2022612] ; National Social Science Foundation of China[KYCX22_1562] ; Special Science and Technology Innovation Program for Carbon Peak and Carbon Neutralization of Jiangsu Province ; Postgraduate Research Innovation Project of Jiangsu Province ; [42277214] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001067749100001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; National Social Science Foundation of China ; Special Science and Technology Innovation Program for Carbon Peak and Carbon Neutralization of Jiangsu Province ; Postgraduate Research Innovation Project of Jiangsu Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/198492]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Huang, Changchun |
| 作者单位 | 1.Nanjing Normal Univ, Sch Geog, Nanjing, Peoples R China 2.Chinese Acad Geol Sci, Inst Karst Geol, Key Lab Karst Dynam MNR & Guangxi, Guilin, Peoples R China 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Chu,Wang, Chuan,Li, Jianhong,et al. Changes in Dissolved Inorganic Carbon Across Yangtze River Regulated by Dam and River-Lake Exchange[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2023,37(9):19. |
| APA | Zhao, Chu.,Wang, Chuan.,Li, Jianhong.,Meng, Lize.,Xue, Jingya.,...&Huang, Changchun.(2023).Changes in Dissolved Inorganic Carbon Across Yangtze River Regulated by Dam and River-Lake Exchange.GLOBAL BIOGEOCHEMICAL CYCLES,37(9),19. |
| MLA | Zhao, Chu,et al."Changes in Dissolved Inorganic Carbon Across Yangtze River Regulated by Dam and River-Lake Exchange".GLOBAL BIOGEOCHEMICAL CYCLES 37.9(2023):19. |
入库方式： OAI收割
来源：地理科学与资源研究所
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