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Human activity and climate change triggered the expansion of rocky desertification in the karst areas of Southwestern China 被引量:1
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作者 Chaojun CHEN Daoxian YUAN +11 位作者 Hai CHENG Tsailuen YU Chuanchou SHEN RLawrence EDWARDS Yao WU Siya XIAO Jian ZHANG Tao WANG Ran HUANG Ziqi LIU Tingyong LI Junyun LI 《Science China Earth Sciences》 SCIE EI CSCD 2021年第10期1761-1773,共13页
It is conducive to the sustainable development of human beings in karst regions to research the mechanism of karst rocky desertification(KRD)expansion.Whether the large-scale KRD in southwestern China is caused by cli... It is conducive to the sustainable development of human beings in karst regions to research the mechanism of karst rocky desertification(KRD)expansion.Whether the large-scale KRD in southwestern China is caused by climate change or human activities is still controversial.In this study,the evolution of the KRD in southwestern China over the past 2000 years was reconstructed through the high-precisionδ^(13)C record of stalagmites from Shijiangjun(SJJ)Cave,Guizhou Province,China.Theδ^(13)C of the stalagmites from SJJ Cave exhibited heavy values from the Medieval Warm Period(MWP)to the Little Ice Age(LIA).Furthermore,theδ^(13)C records of other stalagmites and tufa from southwestern China also showed the same significant heavy trend.Because the stalagmiteδ^(13)C could record the change of ecological environment,it indicated that the consistent change of the stalagmitesδ^(13)C may record the process of KRD expansion in the karst regions of southwestern China.During the MWP,the stronger Asian summer monsoon and the northward movement of the rain belt led to a dry period in southwestern China and a wet period in northern China.In contrast,it was wet in southwestern China and dry in northern China during the LIA.In addition,after the Jing-Kang event(JK event,AD1127)occurred at the end of the Northern Song dynasty,the political and economic center of China migrated to southern China for the first time,which changed the population distribution pattern of larger population in the north and smaller population in the south.Therefore,the expansion of KRD in southwestern China was exacerbated in the MWP due to the change of climate in southwestern China,the migration of a large number of people,wars,the large-scale reclamation of arable land,and the cultivation of large areas of crops. 展开更多
关键词 Karst rocky desertification Jing-Kang event Stalagmiteδ13C record Medieval Warm Period Little Ice Age
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人类活动和气候变化触发了中国西南石漠化的扩张 被引量:13
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作者 陈朝军 袁道先 +11 位作者 程海 Tsai Luen YU Chuan Chou SHEN R.Lawrence EDWARDS 吴尧 肖思雅 张键 王涛 黄冉 刘子琦 李廷勇 李俊云 《中国科学:地球科学》 CSCD 北大核心 2021年第11期1950-1963,共14页
研究石漠化扩张的机制,有利于岩溶地区人与自然的可持续发展.中国西南大面积的石漠化是受气候变化还是人类活动的主导仍然存在争议.通过贵州省石将军洞高精度的石笋δ^(13)C记录,本研究重建了过去2000年来中国西南区域的石漠化演变.从... 研究石漠化扩张的机制,有利于岩溶地区人与自然的可持续发展.中国西南大面积的石漠化是受气候变化还是人类活动的主导仍然存在争议.通过贵州省石将军洞高精度的石笋δ^(13)C记录,本研究重建了过去2000年来中国西南区域的石漠化演变.从中世纪暖期到小冰期,石将军洞石笋δ^(13)C持续偏重;在同一时期,中国西南区域其他石笋和钙华的δ^(13)C记录都表现出同样显著偏重的趋势.由于石笋δ^(13)C记录能够反映洞穴上部的生态环境变化,因此中国西南区域石笋δ^(13)C一致的变化可能反映了中国西南喀斯特地区石漠化扩张的过程.中世纪暖期亚洲夏季风加强,雨带北移,导致了中国西南干旱,北方湿润;相反,在小冰期中国西南湿润,北方干旱.此外,北宋末年靖康事件(AD1127)后中国政治经济中心首次迁移到中国南方,改变了历史上中国人口北多南少的分布模式.因此,中世纪暖期中国西南干旱的气候和大量人口的迁入、战争、大规模开垦耕地以及大面积农作物的种植,加剧了中国西南石漠化的扩张. 展开更多
关键词 石漠化 靖康事件 石笋δ^(13)C 中世纪暖期 小冰期
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