Sediment provenance shifts in the South Yellow Sea: Implications of reduced river discharges over the past 60 years
文献类型：期刊论文
| 作者 | Lu, Jian1,2; Li, Anchun1; Zhang, Jin1; Ma, Xiaochuan1 |
| 刊名 | MARINE GEOLOGY
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 489页码:13 |
| 关键词 | Surface sediments Clay minerals Grain size South Yellow Sea South Yellow Sea |
| ISSN号 | 0025-3227 |
| DOI | 10.1016/j.margeo.2025.107638 |
| 通讯作者 | Lu, Jian(lujian@qdio.ac.cn) |
| 英文摘要 | The Yellow River and Yangtze River significantly influence the South Yellow Sea (SYS) through sediment discharges. Over the past several decades, sediment loads from these rivers into the sea have dramatically decreased due to climate change and intensified human activities. However, there is limited understanding of how this reduction in river discharge might affect the provenance of sediments in the SYS. To address this, surface sediment samples were collected at identical stations in the SYS during two periods: 1958 and 2012. Grain size analysis revealed notable differences: in 2012, clay content decreased, and silt increased, resulting in coarser sediments compared to 1958. Provenance analysis revealed that the fine-grained surface sediments in the SYS were primarily derived from the Yellow and Yangtze Rivers, as evidenced by clay mineral compositions (illite, smectite, kaolinite, and chlorite) and element ratios (Ti/Al vs. Ti/Zr, and Ti/Zr vs. La/Hf). Interestingly, despite reduced sediment loads, the influence of the Yellow River expanded, while the influence of the Yangtze River decreased between 1958 and 2012. These changes in provenance are attributed to differences in sediment transport mechanisms from each source to the SYS. Reduced Yangtze sediment load led to decreased deposition off the Jiangsu coast during summer, limiting Yangtze-derived sediments in the SYS during winter. Conversely, resuspended sediments from the modern and old Yellow River subaqueous deltas provided continuous supply of material to the SYS. This study provides valuable insights into source-to-sink processes in marginal seas, particularly as global rivers continue to experience reductions in sediment discharge. |
| WOS关键词 | YANGTZE-RIVER ; SUBAQUEOUS DELTA ; DEEP-SEA ; CHINA ; CLAY ; DISCRIMINATION ; CIRCULATION ; IMPACTS ; HUANGHE ; WINTER |
| 资助项目 | National Natural Science Foundation of China (NSFC)[42276052] ; Shandong Provincial Natural Science Foundation[ZR2020MD066] |
| WOS研究方向 | Geology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001565855300001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/203329]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Lu, Jian |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao 266237, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Jian,Li, Anchun,Zhang, Jin,et al. Sediment provenance shifts in the South Yellow Sea: Implications of reduced river discharges over the past 60 years[J]. MARINE GEOLOGY,2025,489:13. |
| APA | Lu, Jian,Li, Anchun,Zhang, Jin,&Ma, Xiaochuan.(2025).Sediment provenance shifts in the South Yellow Sea: Implications of reduced river discharges over the past 60 years.MARINE GEOLOGY,489,13. |
| MLA | Lu, Jian,et al."Sediment provenance shifts in the South Yellow Sea: Implications of reduced river discharges over the past 60 years".MARINE GEOLOGY 489(2025):13. |
入库方式： OAI收割
来源：海洋研究所
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