| 澳大利亚的第三纪及第三纪一第四纪过渡期 |
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| 引用本文： | J．R．Dodson,A．Ramrath,李玉梅.澳大利亚的第三纪及第三纪一第四纪过渡期[J].第四纪研究,2000,20(5):397-408. |
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| 作者姓名： | J．R．Dodson A．Ramrath 李玉梅 |
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| 作者单位： | 西澳大利亚大学地理系,珀期澳大利亚 |
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| 摘 要： | 第三纪的板块运动驱动着澳大利亚的气候和植被进行演化。广布的湿润森林区是澳 大利亚早第三纪的特征。一直到始新世，生物多样性都在不断地提高。毫无疑问，这是澳大利亚由高南纬区向北部中纬区运移的结果。从始新世到上新世，澳大利亚的气候总体上要比现在湿润，但降水量季节性变化的增强推动了中新世以后硬叶植物和旱生植物的发展。上新世晚期似乎与第四纪一样，都出现过周期性干旱。这种干旱与冰期条件有关，至少由南澳大利亚晚第四纪的记录可以认识到这一点，澳大利亚的这段历史与东亚的气候变迁是同步发生的。在东亚，印-澳板块的运动致使青藏高原抬升，从而引发了区内乃至全球气候的巨变。穿越赤道区的季风和信风的环流格局致使晚第三纪和第四纪中国与澳大利亚的气候系统的相关性更强。
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| 关 键 词： | 澳大利亚 第三纪 第四纪 古气候 古植被 |
| 收稿时间： | 2000-06-15 |
| 修稿时间： | 2000年6月15日 |
THE TERTIARY AND TERTIARY-QUATERNARY TRANSITION IN AUSTRALIA |
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| J. R. Dodson.THE TERTIARY AND TERTIARY-QUATERNARY TRANSITION IN AUSTRALIA[J].Quaternary Sciences,2000,20(5):397-408. |
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| Authors: | J R Dodson |
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| Institution: | Department of Geography, The University of Western Australia, Perth, Australia 6907 |
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| Abstract: | The evolution of the climate and vegetation of Australia was greatly driven by the consequences of plate tectonic movements throughout the Tertiary. Extensive regions of wet forests characterized the Early Tertiary in Australia. These showed an evolution of increasing diversity through to the Eocene. This was undoubtedly due to the northward movement of the Australian region from high southern to a mid latitude position. The Eocene to Pliocene was generally wetter than today but increasing seasonality in rainfall led to the development of scleromorphy and xerophytism from about the Miocene onwards. The upper Pliocene, however, seems to have more in conunon with Quaternary cycles of aridity which are associated with glacial conditions,at least as we recognise them in Late Quaternary records from southern Australia.This history parallels the patterns of eastern Asia where the movement of the Indian-Australian plate contributed signiflcanily to the uplift of the Tibetan Plateau,and caused major climate change in that region and globally. In the Late Teniary and Quatemary the climate systems of China and Australia have become increasingly linked due to the monsoon and trade wind circulation patterns across the equatorial region. |
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| Keywords: | Australia Tertiary Quaternary palaeoclimate palaeovegetation |
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