| 摘要: |
| 于1990－1993年分别对呼伦湖及乌伦古湖进行了调查，并对其剖面及钻孔进行了孢粉分析，结合14C测年、介形类、硅藻分析资料，对两区孢粉植物群演替、气候与湖泊环境变迁进行了比较。结果表明，10.0kaB．P．前，西北地区湖水位变化与冰川融水有关，东北湖区温凉湿润气候受季风环境影响所致；10.0－7.0kaB．P．及5.0－3.0kaB．P．间，气候干旱，两者受西风带控制；7.0－5.0kaB．P，气候温暖湿润，东亚季风边界推移至我国西北湖区，约2.5-1.0kaB．P．间，季风曾两次在西北湖区作短暂停留，降水略有增多。 |
| 关键词: 孢粉组合 古植被 气候与环境 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金!49172119 |
附件 |
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| THE VEGETATIONAL AND CLIMATIC-ENVlRONMENTAL CHANGES IN HULUN LAKE AND WULUNGU LAKE DURING HOLOCENE |
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Yang Xiangdong, Wang Sumin
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Naning Institute of Geogrophy and Limnology, Nanjing 210008
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| Abstract: |
| In order to reconstruct environmental changes during Holocene from lake sediment in arid and semi-arid areas in Northeast and Northwest China, Hulun Lake and Wulungu Lake sporo-pollen profiles were analysed from 1990 to 1993. The changes of climate and environment in the two regions are discussed and compared in detail based on sporo-pollen assemblage analysis, diatom and ostracods data, and “C dating. About 10.0kaB.P., the water level was related to melting of glacial ice in the Northwest China and the temperate-wet condition was influenced by monsoon change in Northeast China. About 10.0 - 7.0 kaB.P. and 5.0 - 3.0 kaB.P., westerlies prevailed in these areas during the arid period. About 7.0 - 5.0 kaB.P. , the boundary of the eastern monsoon winds reached to the northwest region. During 2.5 - 1.0 kaB. P., monsoon winds prevailed in the northwest region two times, during which precipitation increased slightly. |
| Key words: Sporo-pollen assemblage, Palaeovegetation, Climate and environment |
