Intensified East Asian winter monsoon during the last geomagnetic reversal transition
Intensified East Asian winter monsoon during the last geomagnetic reversal transition
复制标题
DOI：
10.1038/s41598-019-45466-8
复制
发表时间：
2019-06-28
影响因子：
4.6
通讯作者：
Katoh, Shigehiro
中科院分区：
文献类型：
--
作者：
Ueno, Yusuke;Hyodo, Masayuki;Katoh, Shigehiro
地球磁偶极场的强度控制着银河宇宙射线（GCR）通量，而由银河宇宙射线诱发的云的形成会影响气候。在此，我们提供了在上一次地磁倒转过渡期间银河宇宙射线诱发的云对东亚季风产生影响的首个证据。来自中国黄土高原的两百年分辨率的季风记录显示，夏季风（SM）受到倒转前后发生的千年尺度气候事件的影响，并且冬季风（WM）独立于夏季风的变化而增强；粉尘堆积速率增加，这与大阪湾的一次降温事件相吻合。冬季风增强事件在一个夏季风峰值期间持续了约5000年，在此期间地球磁偶极场减弱至……
The strength of Earth's magnetic dipole field controls galactic cosmic ray (GCR) flux, and GCR-induced cloud formation can affect climate. Here, we provide the first evidence of the GCR-induced cloud effect on the East-Asian monsoon during the last geomagnetic reversal transition. Bicentennial-resolution monsoon records from the Chinese Loess Plateau revealed that the summer monsoon (SM) was affected by millennial-scale climate events that occurred before and after the reversal, and that the winter monsoon (WM) intensified independently of SM variations; dust accumulation rates increased, coinciding with a cooling event in Osaka Bay. The WM intensification event lasted about 5000 years across an SM peak, during which the Earth's magnetic dipole field weakened to