Tibetan uplift intensified the 400 k.y. signal in paleoclimate records at 4 Ma
Document Type
Article
Date of Original Version
9-1-2008
Abstract
Knowledge of when and how a specific climatic threshold is crossed is one key to an understanding of the evolution of Earth's climate system. We have observed a simultaneous intensification of the ∼400 k.y. cycle, in both proxy records for global ice volume and for East Asian monsoon precipitation on the Chinese Loess Plateau at ca. 4 Ma, indicating that important climatic thresholds were crossed. The 400 k.y. climatic cycles can be substantially intensified by clipped responses to insolation. We argue that Tibetan uplift accelerated at ca. 4 Ma and triggered such responses. The weaker orbital-band climatic signal during the interval 4-3.6 Ma indicates that the thresholds were only crossed slightly. © 2008 Geological Society of America.
Publication Title, e.g., Journal
Bulletin of the Geological Society of America
Volume
120
Issue
9-10
Citation/Publisher Attribution
Nie, Junsheng, John W. King, and Xiaomin Fang. "Tibetan uplift intensified the 400 k.y. signal in paleoclimate records at 4 Ma." Bulletin of the Geological Society of America 120, 9-10 (2008). doi: 10.1130/B26349.1.