编号：CDUT-2023-12

标题：East Asian lake hydrology modulated by global sea-level variations in the Eocene warmhouse

入藏号：WOS:000918089000005

中国科学院文献情报中心期刊分区：地球科学1区/TOP（2022）

本校作者： 马义权；Ogg, James G；张晨；冯俊；周春花；马超*

来源出版物：EARTH AND PLANETARY SCIENCE LETTERS  卷: 602  文献号: 117925

出版年：2023

第一地址：成都理工大学

关键词： cyclostratigraphy；sedimentary noise；astronomical forcing；lake-level；Eocene

代表图：

摘要：Lake hydrological change and its driving mechanisms in the Eocene warmhouse climate are important to evaluating environmental and ecological changes induced by global warming. Our limited understanding of lake hydrological changes during the Eocene is in part due to the scarcity of well-dated and continuous terrestrial records. Here we refine the middle-late Eocene cyclostratigraphy and decipher high-resolution lake hydrology changes using sedimentary noise modeling and proxy data at four terrestrial basins (Dongying Depression, Nanxiang Basin, Jianghan Basin, and Fushun Basin) in mid-latitudes of East Asia. Our new astrochronology provides a robust timescale for the period of 48.5-38.5 Ma, and our tuned magnetostratigraphy is at least comparable with other timescales between Chrons C18n.1r and C20n. The new astrochronology reveals synchronous lake-level changes in the four basins in East Asia following 1.2 Myr obliquity and 2.4 Myr eccentricity cycles, indicating astronomical forcing on lake-level changes. The 2.4 Myr cycles of lake-levels are generally in phase with 2.4 Myr cycles of global sea-level changes, suggesting that East Asian lake hydrology was modulated by global sea-level variations in the Eocene warmhouse. Therefore, global sea-level variations may be an important driver of East Asia hydroclimate and freshwater resources

文章链接地址: https://www.sciencedirect.com/science/article/pii/S0012821X22005611