Coupled forcing of long eccentricity and silicate weathering on the carbonate dissolution in Southern Ocean during the late Eocene
文献类型：期刊论文
| 作者 | Fan, Qingchao5,6,7; Xu, Zhaokai5,8; von Strandmann, Philip A. E. Pogge7; Chen, Hongjin1; Wang, Wei2; Sun, Tianqi3; Li, Tiegang4 |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 255页码:14 |
| 关键词 | Late Eocene IODP Expedition 369 Southern Ocean Carbonate dissolution Eccentricity forcing Silicate weathering |
| ISSN号 | 0921-8181 |
| DOI | 10.1016/j.gloplacha.2025.105056 |
| 通讯作者 | Xu, Zhaokai(zhaokaixu@qdio.ac.cn) ; von Strandmann, Philip A. E. Pogge(ppoggevo@uni-mainz.de) |
| 英文摘要 | The late Eocene (39-35 Ma), a pronounced greenhouse interval, was characterized by a series of shoaling events of the carbonate compensation depth and widespread carbonate dissolution. However, the mechanisms causing these high-amplitude and rhythmically paced climate-carbon cycle perturbations over this unusually prolonged period (>1 Myr) remain enigmatic, especially in climatically sensitive mid-to-high latitudes. Here, we present the first high-resolution sedimentary carbonate and discrete geochemical data from late Eocene successions (38.5-35.5 Ma) recovered at International Ocean Discovery Program Site U1514 (paleolatitude similar to 53-54 degrees S) in the Southern Ocean. Our results reveal a distinct carbonate-depleted sedimentary interval during the late Eocene warmth (37.5-36.5 Ma), reflecting intense carbonate dissolution in the Southern Ocean. This interval was marked by intensified hydrological cycling and continental erosion, accompanied by a reduction in silicate weathering intensity across southwestern Australia. Simultaneously, peaks in carbonate dissolution in the Southern Ocean coincided with warm phases associated with 405-kyr eccentricity maxima. Given the coherence with multi-ocean carbonate records, we propose that the 405-kyr eccentricity forcing exerted a first-order control over the rhythmic fluctuations of the global calcite compensation depth during the late Eocene. Meanwhile, the inefficiency or failure of the silicate weathering thermostat driven by clay mineral dynamics, superimposed on the orbital forcing, contributed to the extended similar to 1 Myr complete carbonate dissolution. These results, corroborated by carbon cycle modeling simulations, highlight the fundamental role of orbital forcing and silicate weathering in regulating and stabilizing the Earth's climate and carbon cycle over tectonic timescales. |
| WOS关键词 | ANTARCTIC GLACIATION ; ATMOSPHERIC CO2 ; LATE PALEOCENE ; MIDDLE EOCENE ; CHINA SEA ; RECORD ; COMPENSATION ; EROSION ; CLIMATE ; ACIDIFICATION |
| 资助项目 | National Natural Science Foundation of China[42125602] ; National Natural Science Foundation of China[42576077] ; National Natural Science Foundation of China[42306089] ; National Key Research and Development Program of China[2022YFF0800503] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40010100] ; Laoshan Laboratory[LSKJ202204200] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001584069900001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/203515]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Xu, Zhaokai; von Strandmann, Philip A. E. Pogge |
| 作者单位 | 1.Minist Nat Resources, Key Lab Marine Mineral Resources, Guangzhou Marine Geol Survey, Guangzhou 511458, Peoples R China 2.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 3.China Geol Survey, Qingdao Inst Marine Geol, Qingdao 266237, Peoples R China 4.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Metallogeny, Qingdao 266061, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 7.Johannes Gutenberg Univ Mainz, Mainz Geochem & Isotope Ctr MIGHTY, D-55122 Mainz, Germany 8.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao 266237, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Qingchao,Xu, Zhaokai,von Strandmann, Philip A. E. Pogge,et al. Coupled forcing of long eccentricity and silicate weathering on the carbonate dissolution in Southern Ocean during the late Eocene[J]. GLOBAL AND PLANETARY CHANGE,2025,255:14. |
| APA | Fan, Qingchao.,Xu, Zhaokai.,von Strandmann, Philip A. E. Pogge.,Chen, Hongjin.,Wang, Wei.,...&Li, Tiegang.(2025).Coupled forcing of long eccentricity and silicate weathering on the carbonate dissolution in Southern Ocean during the late Eocene.GLOBAL AND PLANETARY CHANGE,255,14. |
| MLA | Fan, Qingchao,et al."Coupled forcing of long eccentricity and silicate weathering on the carbonate dissolution in Southern Ocean during the late Eocene".GLOBAL AND PLANETARY CHANGE 255(2025):14. |
入库方式： OAI收割
来源：海洋研究所
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