【摘要】 为揭示杨官寨遗址仰韶文化中晚期文化与环境的关系,我们对遗址区实测剖面进行沉积物磁化率强度、孢粉等分析研究,表明自距今6000年,受全新世以来陕西关中地区东亚季风气候变化控制,杨官寨遗址古气候呈现温暖湿润与干旱寒凉相互交替的特征。距今6000年到5400年,该地古气候温暖湿润,宜于植被生长,以农业种植与畜牧业为主,为庙底沟文化大型环壕聚落的出现提供了有利基础;距今5400年左右,古气候出现短暂的降温期,呈现干燥低温特征,受此影响,杨官寨遗址聚落规模大幅萎缩。出现了以半坡四期文化,古气候呈现由冷转暖、降温、暖湿、较冷四个阶段的特征。更多还原

【Abstract】 In order to investigate the relationship between the Middle-Late Yangshao cultures and the environment at the Yangguanzhai site,this paper presented the results of magnetic susceptibility and pollen study at the site.The results suggest that the climatic system in the Guanzhong basin was dominated by the East Asian Monsoon since 6,000 B.P.The palaeo-environment reconstruction shows a repeated alteration between warm-wet and dry-cold climate conditions occurred the site.Between 6,000 and 5,400 B.P.,the warm-wet climate condition was optimal for vegetation growth.As a result,the subsistence economies were based upon agriculture and animal husbandry,which eventually laid down an important environmental foundation for the emergence of the large-scale moated settlement during the Miaodigou culture.But starting from 5,400 B.P.,there was a temporary cooling event characterized by a return to the dry and cold climate condition.The climatic event might have led to the significant decrease at the settlement size of Yangguanzhai.Thus,the palaeo-environmental changes could be characterized by four major phases,namely changing from cold to warm,temperature decrease,warm-wet,and relatively cold,during the entire Forth-phase of the Banpo culture.更多还原