Coral-derived seasonal seawater 518O records from the Northern South China Sea: Hydroclimatic insights into the Medieval Climate Anomaly and Little Ice Age
文献类型：期刊论文
| 作者 | Guo, Huimin2,3; Chen, Xuefei3; Guo, Yangrui3; Zhao, Jian-xin1; Wei, Gangjian3; Deng, Wenfeng3 |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 246页码:15 |
| 关键词 | Medieval Climate Anomaly Little Ice Age Coral South China Sea East Asian monsoon El Nino Seawater & otilde 18O |
| ISSN号 | 0921-8181 |
| DOI | 10.1016/j.gloplacha.2025.104718 |
| 英文摘要 | Seawater oxygen isotopes ( 5 18 O sw ) are critical for reconstructing past climate and hydrological conditions, yet high-resolution 5 18 O sw reconstructions during the Medieval Climate Anomaly (MCA) and the Little Ice Age (LIA) remain scarce. Using paired monthly coral Sr/Ca-518O records from Hainan Island in the northern South China Sea (NSCS), we reconstructed wet and dry season 5 18 O sw for these periods. During the MCA, 5 18 O sw values were relatively positive, indicating drier conditions, while the LIA exhibited relatively negative 5 18 O sw values, reflecting wetter conditions. Compared to 1984-2014 CE, the frequency of seasonal extreme 5 18 O sw events increased by 25 %-74 %, likely driven by global warming caused by human activities. Long term trends reveal that dry season 5 18 O sw closely mirrored wet season values, emphasizing the key role of the wet season 5 18 O sw baseline in shaping seasonal hydrological conditions. When examined in the broader late Holocene context, East Asia exhibited a persistent meridional dry-wet contrast, with cold periods characterized by wet oceanic and dry inland conditions, and warm periods showing the opposite. These contrasting patterns were primarily driven by the combined influence of the East Asian Summer Monsoon and El Nino, with additional influences from the meridional shifts of the Intertropical Convergence Zone and zonal movements of the Pacific Walker Circulation. These findings underscore the dynamic interplay of regional climate drivers in shaping hydrological variability and highlight the NSCS's critical role in East Asia's climate. They provide valuable baselines for understanding natural climate variability and predicting future climate changes in this densely populated and economically significant region. |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001407946900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82630]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Deng, Wenfeng |
| 作者单位 | 1.Univ Queensland, Sch Environm, Radiogenic Isotope Facil, Brisbane, Qld 4072, Australia 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Huimin,Chen, Xuefei,Guo, Yangrui,et al. Coral-derived seasonal seawater 518O records from the Northern South China Sea: Hydroclimatic insights into the Medieval Climate Anomaly and Little Ice Age[J]. GLOBAL AND PLANETARY CHANGE,2025,246:15. |
| APA | Guo, Huimin,Chen, Xuefei,Guo, Yangrui,Zhao, Jian-xin,Wei, Gangjian,&Deng, Wenfeng.(2025).Coral-derived seasonal seawater 518O records from the Northern South China Sea: Hydroclimatic insights into the Medieval Climate Anomaly and Little Ice Age.GLOBAL AND PLANETARY CHANGE,246,15. |
| MLA | Guo, Huimin,et al."Coral-derived seasonal seawater 518O records from the Northern South China Sea: Hydroclimatic insights into the Medieval Climate Anomaly and Little Ice Age".GLOBAL AND PLANETARY CHANGE 246(2025):15. |
入库方式： OAI收割
来源：广州地球化学研究所
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