Shift of the upper ocean thermal structure across the Mid-Brunhes Event in the Eastern Tropical Indian Ocean
文献类型：期刊论文
| 作者 | Zhang, Junru6,7; Chang, Fengming2,6,7; Holbourn, Ann3; Qian, Fang4,5; Tang, Luyao6,7; Li, Tiegang1,2 |
| 刊名 | QUATERNARY SCIENCE REVIEWS
 |
| 出版日期 | 2026-02-01 |
| 卷号 | 373页码:13 |
| 关键词 | IODP Site U1482 Mid-Brunhes event Indonesian throughflow Thermal structure Sea level |
| ISSN号 | 0277-3791 |
| DOI | 10.1016/j.quascirev.2025.109747 |
| 通讯作者 | Chang, Fengming(chfm@qdio.ac.cn) ; Li, Tiegang(tgli@fio.org.cn) |
| 英文摘要 | Upper ocean temperature and stratification play essential roles in regulating hydrological processes from regional to basin scales and in shaping climate systems. The Eastern Tropical Indian Ocean (ETIO), as a major source of heat and moisture, is critical to regional and large-scale hydroclimatic variability. However, the longterm evolution of its upper water thermal structure remains poorly constrained. Here, we reconstruct sea surface temperature (SST) and thermocline water temperature (TWT) records spanning the past 620 ka using planktonic foraminiferal Mg/Ca ratios from Core 18548 and IODP Site U1482 off the northwest Australian margin. The results reveal that both SST and TWT exhibit pronounced glacial-interglacial cyclicity, primarily paced by orbital-scale forcing, including the 100-ka and precession (23/19-ka) periodicities. Notably, TWT displays a stronger precession signal than SST. These orbital-scale variations reflect the modulation of heat transfer to the ETIO through sea-level-controlled Indonesian Throughflow (ITF) dynamics and precession-driven atmospheric circulation. The amplified TWT response arises from the combined effects of ITF-mediated thermocline advection and insolation-induced vertical mixing, which together regulate upper ocean heat redistribution. A significant shift in the gradient between SST and TWT (Delta T) around 400 ka, coinciding with the MBE, indicates a major reorganization of upper ocean thermal structure, likely driven by glacioeustatic sea-level fluctuations and changes in precession-induced wind systems. Our findings highlight the coupled forcing of 100-ka cycle and precession on upper ocean thermal evolution in the ETIO and offer critical insights into orbital-scale heat redistribution and tropical ocean-climate interactions. |
| WOS关键词 | PACIFIC WARM POOL ; LONG-TERM CHANGES ; INDONESIAN THROUGHFLOW ; INTERANNUAL VARIABILITY ; THERMOCLINE STRUCTURE ; LEEUWIN CURRENT ; SOUTHERN-OCEAN ; CLIMATE ; CIRCULATION ; EVOLUTION |
| 资助项目 | Laoshan Laboratory[LSKJ202204201] ; National Natural Science Foundation of China[42076051] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001643024700001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204484]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Chang, Fengming; Li, Tiegang |
| 作者单位 | 1.MNR, First Inst Oceanog, Key Lab Marine Geol & Metallogeny, Qingdao 266061, Peoples R China 2.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao 266237, Peoples R China 3.Univ Kiel, Inst Geosci, D-24118 Kiel, Germany 4.Tulane Univ, Dept Earth & Environm Sci, New Orleans, LA 70118 USA 5.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA 6.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Junru,Chang, Fengming,Holbourn, Ann,et al. Shift of the upper ocean thermal structure across the Mid-Brunhes Event in the Eastern Tropical Indian Ocean[J]. QUATERNARY SCIENCE REVIEWS,2026,373:13. |
| APA | Zhang, Junru,Chang, Fengming,Holbourn, Ann,Qian, Fang,Tang, Luyao,&Li, Tiegang.(2026).Shift of the upper ocean thermal structure across the Mid-Brunhes Event in the Eastern Tropical Indian Ocean.QUATERNARY SCIENCE REVIEWS,373,13. |
| MLA | Zhang, Junru,et al."Shift of the upper ocean thermal structure across the Mid-Brunhes Event in the Eastern Tropical Indian Ocean".QUATERNARY SCIENCE REVIEWS 373(2026):13. |
入库方式： OAI收割
来源：海洋研究所
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