Impacts of tectonic changes on the reorganization of the Cenozoic paleoclimatic patterns in China
Impacts of tectonic changes on the reorganization of the Cenozoic paleoclimatic patterns in China
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DOI：
10.1016/j.epsl.2007.03.024
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发表时间：
2007-05
影响因子：
5.3
通讯作者：
Zhongshi Zhang;Huijun Wang;Zhengtang Guo;D. Jiang
中科院分区：
文献类型：
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作者：
Zhongshi Zhang;Huijun Wang;Zhengtang Guo;D. Jiang
地质研究表明，在中国地区渐新世/中新世界线附近，古近纪以行星风为主的气候转变为季风为主的气候。这种演变以区域干旱/湿度对比的变化为标志。始新世中国的南部和北部，以及渐新世/中新世边界附近的东亚中国和中亚地区出现了反差，表明中国进入了季风型气候。喜马拉雅-青藏高原隆升和/或帕拉提斯海退对亚洲季风的影响已经得到了很好的证明。然而，是否有其他因素影响了上述古气候格局的重组，仍是一个有待解决的问题。至少应该解决的其他因素包括印度半岛漂移、南中国海扩张和东中国海侵。在这里，我们利用IAP-AGCM来探讨它们在上述古气候演化中的作用。我们的实验表明，除了帕拉提斯退缩和喜马拉雅-青藏高原隆升的重要作用外，南中国海的扩张是另一个主要的驱动力。相反，印度半岛漂移和东海中国海侵的影响相对较小。喜马拉雅-青藏高原隆升在放大中国南北干湿对比中起着至关重要的作用。帕拉提斯退缩、喜马拉雅-青藏高原隆升和南中国海扩张共同作用，形成了中国东部与中亚地区的干湿差异。退缩和隆升为中国季风气候提供了水汽条件，有利于动力条件的形成。
Geologic studies have illustrated that the planetary-wind-dominant climate in the Paleogene is changed into the monsoon-dominant one near the Oligocene/Miocene boundary in China. The evolution is marked by the changes of regional aridity/humidity contrasts. The contrasts occur between the south and the north part of China in the Eocene, and then between East China and Central Asia near the Oligocene/Miocene boundary, indicating the onset of monsoon-dominant climate in China. The impacts of the Himalaya–Tibetan plateau uplift and/or the Paratethys Sea retreat on the Asian monsoon have been well demonstrated. However, whether or not other factors have affected the above reorganization of paleoclimatic patterns remains a question to be addressed. Additional factors that should be addressed at least include the Indian Peninsular drift, the South China Sea expansion and the East China Sea transgression. Here we use the IAP-AGCM to explore their roles in the above paleoclimatic evolution. Our experiments demonstrate that the South China Sea expansion is another major forcing, in addition to the important roles of the Paratethys retreat and the Himalaya–Tibetan plateau uplift. On the contrary the impacts of the Indian Peninsular drift and the East China Sea transgression are relatively subordinate. The Himalaya–Tibetan plateau uplift plays a crucial role in the magnification of the aridity/humidity contrasts between the south and the north part of China. The Paratethys retreat, the Himalaya–Tibetan plateau uplift and the South China Sea expansion coact to cause the formation of the aridity/humidity contrasts between East China and Central Asia. The retreat and the uplift favor the dynamic condition, and the expansion provides the water vapor condition for the monsoon-dominant climate in China.