| THE IMPACTS OF GLOBAL CHANGE ON DESERTIFICATION IN CHINA |
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| 作者姓名： | Ci Longjun Commission for Integrated Survey of Natural Resources CAS Beijing People's Republic of China |
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| 作者单位： | Ci Longjun Commission for Integrated Survey of Natural Resources，CAS，Beijing 100101 People's Republic of China |
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| 摘 要： | ＩｎＣｈｉｎａ,ｄｅｓｅｒｔｓｍｏｖｉｎｇｎｏｒｔｈｗａｒｄｄｕｅｔｏｔｈｅｕｐｌｉｆｔｉｎｇｏｆｔｈｅＱｉｎｇｈａｉ-ＴｉｂｅｔＰｌａｔｅａｕａｒｅｄｉｓｔｒｉｂｕｔｅｄｉｎａｒｉｄ,ｓｅｍｉ-ａｒｉｄａｎｄｄｒｙｓｕｂ-ｈｕｍｉｄａｒｅａｓｏｆ35°-50°Ｎａｎｄ75°-125°Ｅ.Ｄｅｓｅｒｔｓ,ＧｏｂｉａｎｄｄｅｓｅｒｔｉｆｉｃａｔｉｏｎａｆｆｅｃｔｅｄａｒｅａｓｈｏｒｉｚｏｎｔａｌｌｙｃｒｏｓｓｅｄＮｏｒｔｈｗｅｓｔ,ＮｏｒｔｈａｎｄＮｏｒｔｈｅａｓｔＣｈｉｎａｉｎａｌｅｎｇｔｈｏｆ4,500ｋｍ.Ｔｈｅｖ…
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THE IMPACTS OF GLOBAL CHANGE ON DESERTIFICATION IN CHINA |
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| Ci Longjun Commission for Integrated Survey of Natural Resources,CAS,Beijing People''s Republic of China.THE IMPACTS OF GLOBAL CHANGE ON DESERTIFICATION IN CHINA[J].Journal of Geographical Sciences,1997(3). |
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| Authors: | Ci Longjun Commission for Integrated Survey of Natural Resources CAS Beijing People's Republic of China |
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| Abstract: | Global change and desertification are the serious environmental problems in the world today and exert great impacts on human existence and social development. Therefore, the United Nations has set up quite a number of relevant organizations to encourage millions upon millions of people to combat this harmful problem. At the same time, since the 1992 UN Conference on Environment and Development (UNCED) in Rio de Janeiro, the UN Convention to Combat Desertification has been signed and this signment of the Convention will powerfully promote the concrete action programs to combat desertification of each affected country and enlarge the exchange and cooperation among the affected countries. According to recent information of UN Organizations, more than 100 countries and their one-fifth world of population are facing the problem of desertification processes and desertification impacts, and are suffering from expansion of desertification. The total areas of arid, semi-arid and dry sub-humid zones cover approximately about 6.5 billion ha, occupying 41 percent of the total land area of the earth. There are 3.6 billion ha of arable land and grazing land under the impact of desertification in the world. From 1984 to 1991, the annual increase of land desertification is 3.4 percent. The harmful results of desertification on human existence in terms of environment, societies and economy are serious and called for great attention from the UN Systems. It is concluded that desertification is the most serious environmental problem in the world and its resulting impact is socially and economically surprising. |
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| Keywords: | desertification global change CO 2 concentration greenhouse effect China |
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