TY - JOUR
T1 - East Asian lake hydrology modulated by global sea-level variations in the Eocene warmhouse
AU - Ma, Yiquan
AU - Fan, Majie
AU - Li, Mingsong
AU - Ogg, James G.
AU - Zhang, Chen
AU - Feng, Jun
AU - Zhou, Chunhua
AU - Liu, Xiaofeng
AU - Lu, Yongchao
AU - Liu, Huimin
AU - Eldrett, James S.
AU - Ma, Chao
N1 - Funding Information:
We thank Shoupeng Zhang, Yunqing Hao, Pu Wang, Jianbin Teng, Zhengwei Fang, Min Wang, Zheng Li, and Jun Liu in the Geological Sciences Research Academy of Sinopec Shengli Oilfield Company for assistance with core observation, photography, sampling, logging interpretation, and laboratory. We also thank Chunju Huang, Juye Shi, Siding Jin, Ke Xu, and He Huang for their helpful suggestions. This work was supported by the National Natural Science Foundation of China [grant numbers 42172181 , 41802175 , 42172137 , 41888101 , 42072040 ], the National Key R&D Program of China [grant numbers 2022YFF0802900 , 2021YFA0718200 ], the Natural Science Foundation of Sichuan Province [grant number 2022NSFSC1075 ], and the National Science and Technology Major Project [grant number 2017ZX05049004 ]. We appreciate Editor-in-Chief Laurence Coogan, Christian Zeeden, and two anonymous reviewers for their careful and constructive comments that helped to improve the manuscript.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1/15
Y1 - 2023/1/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85143698005&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85143698005&partnerID=8YFLogxK
U2 - 10.1016/j.epsl.2022.117925
DO - 10.1016/j.epsl.2022.117925
M3 - Article
AN - SCOPUS:85143698005
SN - 0012-821X
VL - 602
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
M1 - 117925
ER -
