ABSTRACT

     This research relies on the pollen data retrieved from a lacustrine sediment sequence (i.e., MC-1) in the Mianchi Basin within the Central Plains of China to quantitatively reconstruct the change in Pann (i.e., MAP) of the past ~19,000 years. The reconstruction shows that the Last Deglacial (18.7–11.4 cal ka BP) was the driest interval of the past ~19,000 years. The early Holocene (11.4–7.8 cal ka BP) was the time when the stage average (MAP) was higher than the Holocene average and the mid-Holocene (7.8–5.0 cal ka BP) was the time when the stage average was lower than the Holocene average. The earlier portion of the late Holocene (5.0–2.8 cal ka BP) enjoyed the highest MAP of the past ~19,000 years and the later portion of the late Holocene (2.8–1.2 cal ka BP) was relatively dry. Our regional comparison shows that the Central Plains of China appeared to have shared the climatic controls with the southern region in certain times (8.0–5.0 cal ka BP) and with the northern region in other times (5.0–2.8 cal ka BP). An extended tri-pole mode proposition seems applicable to explaining the regional comparison-displayed spatiotemporal patterns. That is, the switches between the La Nino- and the El Nino-dominating conditions in the Tropical Pacific pushed the Western Pacific Subtropical High shifting between northern and southern positions, leading to the EASM-related rain-belt in the eastern China moving between northern and southern positions.

Hongbin Li a,b,* , Yangyang Zhang a,b,**, Zhaodong Feng a,b,***

a College of Geography and Environmental Science, Henan University, Kaifeng, Henan, 475004, China

b Key Laboratory of Earth System Observation and Simulation of Henan Province, Kaifeng, Henan, 475004, China

E-mail addresses: lihongbin616@163.com (H. Li), zhangyangyang@henu.edu.cn (Y. Zhang), fengzd@vip.henu.edu.cn (Z. Feng).

https://doi.org/10.1016/j.quaint.2023.05.018