Impact of Mountains in Southern China on the Eocene Climates of East Asia
Impact of Mountains in Southern China on the Eocene Climates of East Asia
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DOI：
10.1029/2022jd036510
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发表时间：
2022-08
期刊：
影响因子：
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通讯作者：
Zi-jian Zhang;Zhongshi Zhang;Zhilin He;N. Tan;Zhengtang Guo;Jiang Zhu;S. Steinig;Y. Donnadieu
中科院分区：
文献类型：
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作者：
Zi-jian Zhang;Zhongshi Zhang;Zhilin He;N. Tan;Zhengtang Guo;Jiang Zhu;S. Steinig;Y. Donnadieu
地质研究和模拟都揭示了东亚始新世气候的不一致性。早期的一些重建显示中国中纬度地区为干旱带，但其他重建显示同一地区为湿润气候。此外，以前的始新世模式研究表明，气候模式可以在中国模拟这两种情景。因此，有必要调查这种模型传播的原因。我们利用挪威地球系统模式1‐F进行了一系列实验，研究了中国南方山脉对模拟始新世气候的影响。这些山脉，包括冈底斯山脉和东南山脉，位于水汽输送到东亚的主要路径上。结果表明，东南山脉对始新世中国东部地区的模拟降水起主导作用。当东南山脉海拔高度超过~ 2000 m时，中国中纬度地区出现干旱带，而东南山脉海拔相对较低时，中国东部地区出现湿润气候。
Inconsistencies in the Eocene climates of East Asia have been revealed in both geological studies and simulations. Several earlier reconstructions showed an arid zonal band in mid‐latitude China, but others showed a humid climate in the same region. Moreover, previous Eocene modeling studies have demonstrated that climate models can simulate both scenarios in China. Therefore, it is essential to investigate the cause of this model spread. We conducted a series of experiments using Norwegian Earth System Model 1‐F and examined the impact of mountains in Southern China on the simulated Eocene climate. These mountains, including the Gangdese and Southeast Mountains, are located along the main path of water vapor transport to East Asia. Our results reveal that the Southeast Mountains play the dominant role in controlling the simulated precipitation in Eastern China during the Eocene. When the heights of the Southeast Mountains exceed ∼2,000 m, an arid zonal band appears in mid‐latitude China, whereas humid climates appear in Eastern China when the elevation of the Southeast Mountains is relatively low.