【作者】 陈垚； 钱会；

【Author】 CHEN Yao;QIAN Hui;School of Environmental Science and Engineering,Chang’an University;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region,Ministry of Education,Chang’an University;

【机构】 长安大学环境科学与工程学院； 旱区地下水文与生态效应教育部重点实验室；

【摘要】 对西安南郊地区全新世以来的环境演变特征进行系统研究,建立该研究区域全新世以来黄土-古土壤沉积年代序列,分析东亚冬、夏季风变迁规律,为揭示人为干扰西安地区的古环境以及如何恢复秀美山川提供依据。本文以西安南郊少陵塬为例,使用"TFPW-MK突变检验"和滑动秩和分析其磁化率序列的变异节点,并得出其变化趋势。结果表明:西安南郊少陵塬磁化率序列在3200a B.P.左右发生了突变,且变异程度较高,与此同时,该研究区域黄土孢粉含量也有较大程度变化,透露出全新世以来西安南郊地区古环境生态条件的突变。其主要原因为自然环境演化过程中叠加人类活动,致使环境的恶化。因此,可利用本文揭示的环境演变与人类活动的规律为黄土高原的改善提供依据。更多还原

【Abstract】 This paper present a systematic study of environmental evolution characteristics in southern suburb of Xi’an area since Holocene.Based on the establishment of the loess-paleosol sedimentary sequence since Holocene in the study areas,analyzing the vicissitudes law of the East Asian winter and summer monsoon,providing the evidence for revealing the interference of human activity on the ancient environment in Xi’an area.In the southern suburb of the Xi’an area Shaolingyuan as example,TFPW-MK mutation test and sliding rank sum test are used to analyze the variation of the magnetic susceptibility sequence and concluded the change trend.The results show that:1)the southern suburbs of Xi’an Shaolingyuan magnetic susceptibility sequence at about 3200 a B.P.mutations and it has a high degree of variability.2) the content of the study area of loess pollen also has a greater degree of change,revealing that the ecological conditions of the paleo-environment has been deteriorating.Therefore,it can be used to provide the basis for the improvement of the Loess Plateau by the law of the environmental evolution and human activities revealed in this paper.更多还原