Changes in chemical weathering regime of shelf sediments of the East China Sea controlled by sea-level and climatic changes since the last deglaciation
文献类型：期刊论文
| 作者 | Lan, Kai2; Liu, Xiting2,4; Li, Anchun3; Xu, Fangjian5; Qiao, Peijun1; Wang, Houjie2,4 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2024-06-01 |
| 卷号 | 268页码:11 |
| 关键词 | Chemical weathering East China Sea Last deglaciation Sea -level changes Paleoclimate |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2024.106169 |
| 通讯作者 | Liu, Xiting(liuxiting@ouc.edu.cn) |
| 英文摘要 | Chemical weathering of shelf sediments is important in driving the global elemental cycle and climate to maintain the earth's habitability. However, the response mechanism between chemical weathering of shelf sediments and climate and sea-level changes is still unclear. This study focuses on core ECMZ located in the mud area of the East China Sea (ECS) inner shelf. The results indicate that the mechanisms controlling chemical weathering in the sediment of the ECS inner shelf differ at different timescales. On the orbital time scale, the Chemical Index of Alteration (CIA) indicates that the intensity of chemical weathering in sediments during the deglacial period was significantly higher than that during the Holocene. This was caused by shelf exposure during low sea-level periods when the sediments were fully exposed and the residence time in the weathering zone was long, leading the shelf sediments to undergo consistent and complete weathering under supply-limited conditions. In comparison, during cold events on the millennium-centennial time scale, such as Younger Dryas, 8.2 ka, and 4.2 ka, chemical weathering was weaker (lower CIA values) due to accelerated erosion as a result of lower temperatures and higher precipitation, which shortened the rocks' residence in the weathering zone, resulting in the control of chemical weathering shifted from supply factors to kinetic ones, such as temperature and precipitation. Our findings suggest that on the orbital time scale, glacial shelf exposure could enhance chemical weathering, thereby reducing atmospheric CO2; on the millennium-centennial time scale, chemical weathering could rapidly respond to abrupt climate events. |
| WOS关键词 | CHANGJIANG RIVER ; GLACIAL MAXIMUM ; SUSPENDED SEDIMENTS ; LITHIUM ISOTOPES ; ALTERATION CIA ; ASIAN MONSOON ; GEOCHEMISTRY ; ROCKS ; INTENSITY ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[42276060] ; Natural Science Foundation of Shandong Province[ZR2021YQ26] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001265927900001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/186332]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Liu, Xiting |
| 作者单位 | 1.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China 2.Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Technol, Qingdao 266100, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao 266237, Peoples R China 5.Hainan Univ, Sch Marine Sci & Engn, Haikou 570228, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lan, Kai,Liu, Xiting,Li, Anchun,et al. Changes in chemical weathering regime of shelf sediments of the East China Sea controlled by sea-level and climatic changes since the last deglaciation[J]. JOURNAL OF ASIAN EARTH SCIENCES,2024,268:11. |
| APA | Lan, Kai,Liu, Xiting,Li, Anchun,Xu, Fangjian,Qiao, Peijun,&Wang, Houjie.(2024).Changes in chemical weathering regime of shelf sediments of the East China Sea controlled by sea-level and climatic changes since the last deglaciation.JOURNAL OF ASIAN EARTH SCIENCES,268,11. |
| MLA | Lan, Kai,et al."Changes in chemical weathering regime of shelf sediments of the East China Sea controlled by sea-level and climatic changes since the last deglaciation".JOURNAL OF ASIAN EARTH SCIENCES 268(2024):11. |
入库方式： OAI收割
来源：海洋研究所
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