Decoupled Land and Ocean Temperature Trends in the Early‐Middle Pleistocene

Autor: Hongxuan Lu, Weiguo Liu, Hong Yang, Qin Leng, Zhonghui Liu, Yunning Cao, Jing Hu, Weijuan Sheng, Huanye Wang, Zheng Wang, Zeke Zhang, Youbin Sun, Weijian Zhou, Zhisheng An
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Geophysical Research Letters, Vol 49, Iss 17, Pp n/a-n/a (2022)
Druh dokumentu: article
ISSN: 1944-8007
0094-8276
DOI: 10.1029/2022GL099520
Popis: Abstract Record of long‐term land temperature changes remains ephemeral, discontinuous, and isolated, thus leaving the common view that Pleistocene land temperature evolution should have followed ocean temperatures unconfirmed. Here, we present a continuous land surface temperature reconstruction in the Asian monsoon region over the past 3.0 Myr based on the distribution of soil bacterial lipids from the Chinese Loess Plateau. The land temperature record indicates an unexpected warming trend over the Pleistocene, which is opposite to the cooling trend in Pleistocene ocean temperatures, resulting in increased land‐sea thermal contrast. We propose that the previously unrecognized increase of land‐sea thermal contrast during much of the Pleistocene is a regional climate phenomenon that provides a likely mechanism in favor of the long‐term enhancement of the Pleistocene East Asian summer monsoon.
Databáze: Directory of Open Access Journals
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