| 黄土高原发展过程中的五大转折 |
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| 引用本文： | 赵景波.黄土高原发展过程中的五大转折[J].地理学报(英文版),2005,15(4):475-483. |
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| 作者姓名： | 赵景波 |
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| 作者单位： | 1.Departm entofGeography，ShaanxiNormalUniversity，Xi’an 710062，China; 2.State Key Laboratory ofLoessand Quaternary Geology，Institute ofEarth Environment，CAS，Xi’an 710054，China |
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| 基金项目： | InternationalItem ofGeologicalComparison Plan,No.IGCP448，ProjectofState Key Laboratory ofLoess andQuaternary Geology,CAS,No.SKLLQG04011，No.SKLLQG0504 |
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| 摘 要： | 1 Introduction W hatim portanttransform ations have taken place during the form ation ofthe Loess Plateau in China? Research on this problem has especially im portantscientific significance forus to learn ofthe evolution oftheLoessPlateau and predictthe f…
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| 关 键 词： | 黄土高原 气候环境 红土 河流 |
| 收稿时间： | 2005-01-30 |
| 修稿时间： | 4/3/2005 12:00:00 AM |
The five major changes in the evolution of the Loess Plateau |
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| Zhao Jingbo Ph.D..The five major changes in the evolution of the Loess Plateau[J].Journal of Geographical Sciences,2005,15(4):475-483. |
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| Authors: | Zhao Jingbo PhD |
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| Institution: | Shaanxi Normal University |
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| Abstract: | On the basis of the geomorphology, paleosol, paleoclimate and loess age, major changes of the Loess Plateau were studied.
There are five major changes in the evolution of the Loess Plateau in China. Among them, the first, second, third and fourth
major changes have taken place since the formation of the Loess Plateau, and the fifth major change will happen in 100 years.
The first major change, which occurred at about 2.50 Ma BP, was a transition from red earth plateau to the Loess Plateau,
and reflects the climate from the warm-sub-humid to the alteration between cold-and-dry and warm-and-humid. The driving force
of this first major change was climate. The second major change, which took place at about 1.60 Ma BP, was a vital transition
of the main rivers in this area from non-existence to existence, and represented an important change on the Loess Plateau’s
neotectonic uplift from the slow rising to periodically accelerated rising, and making the river’s erosion go from feeble
to strong. The driving force of the second major change is tectonic uplift. The third major change which occurred at about
150 ka, was a great transition of the Yellow River’s inpouring from a lake outlet to a sea outlet. At that time, the Yellow
River cut the Sanmen Gorge. The transition led to the transformation of loess material from internal transportation to external
transportation. The driving force of the third major change was running water erosion. The fourth one that occurred at about
1.1 ka was a change of the Loess Plateau from natural erosion to erosion accelerated by human influences. The driving force
of the fourth major change is mainly human activities. The fifth major change, which is the opposite change to the fourth
one, in which the motive power is human activity, too. |
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| Keywords: | the Loess Plateau major changes the driving force the age of change |
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