Low-latitude forcing on 4.2 ka event indicated by records in the Asian monsoon region,Global and Planetary Change

当前位置： X-MOL 学术 › Glob. Planet. Change › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Low-latitude forcing on 4.2 ka event indicated by records in the Asian monsoon region
Global and Planetary Change ( IF 3.9 ) Pub Date : 2024-03-08 , DOI: 10.1016/j.gloplacha.2024.104401
Xin Zhou , Xiaoyan Liu , Tao Zhan , Dorcas B. Oyebanji , Jixiao Zhang , Luyao Tu , Shiwei Jiang

The 4.2 ka event is an important climatic event of the Holocene that is expected to considerably influence the development of human civilizations. However, the forcing mechanism of the 4.2 ka event remains unclear, with current evidence being divided between high-latitude and low-latitude forcings. The Asian climate system contains strong summer and winter monsoon circulations, and thus the region is ideal for studying high- and low-latitude climate forcings on 4.2 ka event. In this study, we present a high-resolution pollen record of the past 5000 years from Wudalianchi Crater Lake in northeastern China in the East Asian monsoon region. An evident decrease in broadleaf trees occurred during the 4.2 ka event, suggesting a decrease in summer monsoon rainfall. Well-dated high-resolution pollen, stalagmite δO, and winter monsoon records were collected to study the possible transportation of high- and low-latitude signals. Most of the pollen records showed significant changes during the 4.2 ka event, while no apparent change was found in winter monsoon records. Meanwhile, more obvious changes in stalagmite δO records were observed in lower- rather than the higher-latitude regions around 4.2 ka. Our results suggest that the signal of the 4.2 ka event might be transported by low-latitude processes, thus corresponding to a low-latitude forcing.

更新日期：2024-03-08

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>