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DOI | 10.1038/s41561-019-0359-x |
Periodic changes in the Cretaceous ocean and climate caused by marine redox see-saw | |
Wallmann, Klaus1; Flogel, Sascha1; Scholz, Florian1; Dale, Andrew W.1; Kemena, Tronje P.1; Steinig, Sebastian1; Kuhnt, Wolfgang2 | |
2019-06-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:6页码:456-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Periodic changes in sediment composition are usually ascribed to insolation forcing controlled by Earth's orbital parameters. During the Cretaceous Thermal Maximum at 97-91Myr ago (Ma), a 37-50-kyr-long cycle that is generally believed to reflect obliquity forcing dominates the sediment record. Here, we use a numerical ocean model to show that a cycle of this length can be generated by marine biogeochemical processes without applying orbital forcing. According to our model, the restricted proto-North Atlantic and Tethys basins were poorly ventilated and oscillated between iron-rich and sulfidic (euxinic) states. The Panthalassa Basin was fertilized by dissolved iron originating from the proto-North Atlantic. Hence, it was less oxygenated while the proto-North Atlantic was in an iron-rich state and better oxygenated during euxinic periods in the proto-North Atlantic. This redox see-saw was strong enough to create significant changes in atmospheric p(CO2). We conclude that most of the variability in the mid-Cretaceous ocean-atmosphere system can be ascribed to the internal redox see-saw and its response to external orbital forcing. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469459600013 |
WOS关键词 | FERRUGINOUS CONDITIONS ; BIOGEOCHEMICAL CYCLES ; EARTH HISTORY ; TARFAYA BASIN ; CARBON BURIAL ; MODEL ; OSCILLATIONS ; PHOSPHORUS ; EVOLUTION ; ATLANTIC |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/183935 |
专题 | 地球科学 气候变化 |
作者单位 | 1.GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany; 2.Univ Kiel, Inst Geowissensch, Kiel, Germany |
推荐引用方式 GB/T 7714 | Wallmann, Klaus,Flogel, Sascha,Scholz, Florian,et al. Periodic changes in the Cretaceous ocean and climate caused by marine redox see-saw[J]. NATURE GEOSCIENCE,2019,12(6):456-+. |
APA | Wallmann, Klaus.,Flogel, Sascha.,Scholz, Florian.,Dale, Andrew W..,Kemena, Tronje P..,...&Kuhnt, Wolfgang.(2019).Periodic changes in the Cretaceous ocean and climate caused by marine redox see-saw.NATURE GEOSCIENCE,12(6),456-+. |
MLA | Wallmann, Klaus,et al."Periodic changes in the Cretaceous ocean and climate caused by marine redox see-saw".NATURE GEOSCIENCE 12.6(2019):456-+. |
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