Title: Holocene Climate and Environmental Changes in the Eolian Sand Section of Yulin,Shaanxi Province
Abstract:The eolian-sand section along the Great Wall in Yulin,Shaanxi province,is sensitive to climate and environmental changes.The magnetic susceptibility and particle-size analysis in Dabaodang profile sho...The eolian-sand section along the Great Wall in Yulin,Shaanxi province,is sensitive to climate and environmental changes.The magnetic susceptibility and particle-size analysis in Dabaodang profile showed that the early Holocene(11 500~10 000 a BP),was a transition during the change in eolian regime and dust source because of the weakened northwesterly monsoon along with the global climatic amelioration;the middle Holocene(10 000~4 500 a BP) was relatively humid,while vegetation coverage increased,aeolian activities weakened,silt and clay compositions were significantly increased,weathering pedogenesis was enhanced,and sandy weak paleosols were developed;the late stage of the middle Holocene(4 500~3 000 a BP) was mild and humid in general,but at 4 200~4 000 a BP an arid climate event occurred,with intensive eolian sand activities;the climate was droughty and fluctuating frequently in recent 3 000 a,while eolian sand was significantly coarser,which showing 5 times desert expansions.Natural factors played an important role in the environmental changes in this area,and human activities greatly strengthened and amplified the changes at the modern times.Read More
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 1
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