Diverse manifestations of insolation forcing of environmental changes during the middle Piacenzian
- Lanzhou University, China (gaop18@lzu.edu.cn)
The middle Piacenzian period is the closest sustained warm interval and a possible analog to the future climate. It is well known that global ice volume exhibits dominant 41-kyr cyclicities. However, high resolution terrestrial paleoenvironmental records are scare. Here we present a 3.6 kyr terrestrial environmental variation record from Teruel Basin of Spain and compare the results with the East Asian monsoon records. The Spain results show dominant 41-kyr cycles during the early Piacenzian (3.3-3.15 Ma) when eccentricity was at minimum, but the 41-kyr cycles weakens during the late Piacenzian 3.15-2.95 Ma when eccentricity got increased, suggesting direct forcing by insolation. This pattern is different from the monsoonal records from China, which demonstrates persistent 20-kyr cycles during the entire middle Piacenzian. The strong 41-kyr cycles in westerly region during the early Piacenzian may originate from its higher latitude and higher sensitivity to insolation gradient forcing.
How to cite: Gao, P. and Nie, J.: Diverse manifestations of insolation forcing of environmental changes during the middle Piacenzian, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-1733, https://doi.org/10.5194/egusphere-egu21-1733, 2021.