近1 ka以来河西地区的沙漠化及对高强度人类活动的响应分析

doi:10.12118/j.issn.1000-6060.2018.05.17

摘要/Abstract

摘要： 河西地区地处青藏高原区与西北干旱区过渡带，是当下推进"一带一路"伟大战略建设的重要通道。同时，该地区也是我国沙漠化最严重地区之一。通过对已发表的河西地区风沙堆积事件与历史时期战争、人口数量、降水变化进行综合对比研究，分析了该地区近1 ka以来沙漠化的主导因素。结果显示：（1）在最近1 ka以来，河西地区的沙漠化主要发生在0.91 ka、0.74 ka、0.68 ka、0.44 ka、0.32 ka、0.24 ka、0.18~0.12 ka和<0.1 ka时段。（2）0.91 ka、0.74 ka、0.68 ka、0.44 ka和0.24 ka时段的沙漠化敏感地响应了高强度的战争活动，0.32 ka时段的沙漠化是对区域低降水量的响应。（3）近200 a以来的沙漠化是对人口快速增长的响应。

关键词: 沙漠化成因, 河西地区, 丝绸之路经济带

Abstract: The mechanism of desertification has always been the hotspot of academic research.The Hexi region,which is located in the transitional zone from the Qinghai-Tibet Plateau to the arid area in Northwestern China,is a key region for construction of the Belt and Road Initiative.Hexi area is the bridge of material and cultural interaction between East and West China during historical period,meanwhile,Hexi is also one of the areas with the most serious desertification in China,the worsening desertification has seriously affected the development of local economy and culture and threatened the smooth implementation of the Belt and Road Initiative.So,grasping the causes and evolution mechanisms of desertification clearly in Hexi area will have great significance in formulating desertification control strategies and controlling desert expansion.The ecology and environment in Hexi area is very sensitive to the intensity of human activities and to climate change,a large number of studies have shown that desertification was controlled by climate change before 3 ka,and then human activities gradually became the dominant factor of desertification after 3 ka.But the way in which human activities affect the desertification process has not been reported.Based on coupling with histories of desertification,warfare,variation of the population and climatic background,this paper analyzed the mechanism of desertification over the past 1 ka.The following results were obtained:(1) During the latest 1 ka,desertification in the Hexi region happened in intervals of 0.91 ka,0.74 ka,0.68 ka,0.44 ka,0.32,0.24 ka,0.18-0.12 ka and <0.1 ka. (2) Desertification sensitively responded to intensified human activities except that happened at around 0.32 ka as a consequence of low precipitation. (3) Desertification during the recent 200 years is a response to rapid growth of human population.Main innovation points of this paper include as follows:(1) There were 8 desertification processes occurred in the Hexi area during the latest 1 ka. (2) the wars occurred in the region was regarded as a strong human activity on desertification in the paper.

Key words: mechanism of desertification, Hexi region, the Silk-road Economic Belt

中图分类号:

P931.3

马俊, 牟雪松, 王永达, 刘文浩, 范育新. 近1 ka以来河西地区的沙漠化及对高强度人类活动的响应分析[J]. 干旱区地理, 2018, 41(5): 1043-1052.

MA Jun, MOU Xue-song, WANG Yong-da, LIU Wen-hao, FAN Yu-xin. Response of desertification to intensified human activities over the latest 1 ka in Hexi region[J]. 干旱区地理, 2018, 41(5): 1043-1052.

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