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。
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.
出处
《灾害学》
CSCD
1996年第2期71-75,共5页
Journal of Catastrophology
基金
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
关键词
环境变迁
灾害性气候
气候变化
北京地区
Dongganchi, 15000aB.P.,Sporopollen analysis, Paleo-environment, Abrupt climate event, Climate anomaly
