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第七章 环境演变 - PowerPoint PPT Presentation


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第七章 环境演变. 教学内容 第一节 第三纪的环境演变 第二节 第四纪的环境演变 第三节 全新世的环境演变 第四节 近百年气候变化及演变趋势. 有人 类活 动的 自然 环境 演化 过程. 人文 - 自然 环境演化过程. 自然 - 人文 环境演化过程. 纯自然环境演化过程. 中国自然地理环境演变认识思路. 36 亿年. 距今. 公元. 67 百万年. 170 万年. 6000 年. 1736 年. 1949 年. 现在. 未来. 自 然 环 境 演 化 进 程. 华北

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第七章 环境演变

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36

67

170

6000

1736

1949

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1.

2.

3.


1000 m

2000 m


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.-

1.

2.

3.

4 .

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  • 2 000 m

  • 5 200~5 300 m

    4 500 ~5 000 m

  • 5~6 mm/a

  • (120~180104a.B.P)

    3 000 m

  • 3 500 ~4 000 m4 500 m

  • 4 500 m, 4 000 m







---

6 000


170


5 000-6 000

/ O C

/100m








5000

2-17 5 000

1972


IPCC1995190.30.61001025 cm

20198020102020402050702070204060208020802040

19511990


20181920105030607070

2027460.5(0.5)18()


2-18 2070(CO2)


190620050.74211.16.420

..


190820071.11986212007195150300.990


6.


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