| 北京地区15000年以来环境变迁中灾害性气候突变事件的讨论 |
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| 引用本文： | 张佳华,孔昭宸.北京地区15000年以来环境变迁中灾害性气候突变事件的讨论[J].灾害学,1996,11(2):71-75. |
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| 作者姓名： | 张佳华 孔昭宸 |
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| 作者单位： | 中国科学院植物研究所 |
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| 基金项目： | 中国科学院古生物与古人类学科基础研究特别支持，国家自然科学基金 |
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| 摘 要： | 通过高分辨率孢粉分析及烧失量、炭屑实验结果的统计分析，结合１４Ｃ、古地磁等，对北京房山东甘池１５０００ａ以来植被变化和环境变迁进行了较为深入的研究，特别强调气候变化的灾害性突变事件。初步得知约在１４１００～１４０００ａＢ．Ｐ．前后曾出现与哥得堡反转相对应的事件，在１００００ａＢ．Ｐ．左右出现类似与新仙女木事件相对应的事件，在大约５７７０ａＢ．Ｐ．和４５６０ａＢ．Ｐ．左右及２８５０～２６５０ａＢ．Ｐ．出现了大暖期的突然降温事件。
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| 关 键 词： | 北京东甘池 15000年 孢粉 古环境 突变性事件 气候异常 |
DISASTROUS ABRUPT CLIMATE EVENTS OF ENVIRONMENT CHANGE IN BEIJING IN RECENT 15 000 YEARS |
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| Zhang Jiahua, Kong Zhaochen,Du Naiqiu.DISASTROUS ABRUPT CLIMATE EVENTS OF ENVIRONMENT CHANGE IN BEIJING IN RECENT 15 000 YEARS[J].Journal of Catastrophology,1996,11(2):71-75. |
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| Authors: | Zhang Jiahua Kong Zhaochen Du Naiqiu |
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| Abstract: | In this paper, 197 samples were gathered from a 820 cm profile in Dongganchi of Fangshan, Beijing. They provided a continuous records of vegetation and environmental changes over ca. 15000a. B. P.. By these records, it is concluded that about 14100-14000aB.P.,the climate was cold and dry, which corresponds to Gothenburg Drift and interval between 10620 to 10310aB. P.. The rapid decline in pollen,charcoal concentrations and LOI implied a more colder climate and probably corresponded to Younger Dry as cooling event,at 5770aB.P.and 4650aB.P.and 2850-2650aB.P.,while the decline of forest cover showed three abrupt cold episodes. |
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| Keywords: | Dongganchi 15000aB P Sporopollen analysis Paleo-environment Abrupt climate event Climate anomaly |
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