Aeolian activity in the southern Gurbantunggut Desert of China during the last 900 years

作     者：LI Wen MU Guijin YE Changsheng XU Lishuai LI Gen LI Wen;MU Guijin;YE Changsheng;XU Lishuai;LI Gen

作者机构：Key Laboratory for Digital Land and Resources of Jiangxi ProvinceEast China University of TechnologyNanchang 330013China School of Earth SciencesEast China University of TechnologyNanchang 330013China Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China College of Resources and EnvironmentShanxi Agricultural UniversityJinzhong 030801China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2023年第15卷第6期

页      面：649-666页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China (42167063) the Open Fund of Key Laboratory for Digital Land and Resources of Jiangxi Province (DLLJ202113) the State Scientific Survey Project of China (2017FY101001) the Natural Science Foundation of Jiangxi Province (20202BABL213028) the Scientific Research Foundation of East China University of Technology (DHBK2019028) 

主　　题：aeolian activity grain size wind regime Little Ice Age Siberian High climatic drying Central Asia 

摘      要：The mineral dust emitted from Central Asia has a significant influence on the global climate ***,the history and mechanisms of aeolian activity in Central Asia remain unclear,due to the lack of well-dated records of aeolian activity and the intense wind erosion in some of the dust source areas(e.g.,deserts).Here,we present the records of aeolian activity from a sedimentary sequence in the southern Gurbantunggut Desert of China using grain size analysis and optically stimulated luminescence(OSL)dating,based on field sampling in ***,we used eight OSL dates to construct chronological frameworks and applied the end-member(EM)analysis for the grain size data to extract the information of aeolian activity in the southern Gurbantunggut Desert during the last 900 *** results show that the grain size dataset can be subdivided into three EMs(EM1,EM2,and EM3).The primary modal sizes of these EMs(EM1,EM2,and EM3)are 126.00,178.00,and 283.00μm,***1 represents a mixture of the suspension components and saltation dust,while EM2 and EM3 show saltation dust transported over a shorter distance via strengthened near-surface winds,which can be used to trace aeolian *** with the OSL chronology,our results demonstrate that during the last 900 a,more intensive and frequent aeolian activity occurred during 450-100 a BP(Before Present)(i.e.,the Little Ice Age(LIA)),which was reflected by a higher proportion of the coarse-grained components(EM2+EM3).Aeolian activity decreased during 900-450 a BP(i.e.,the Medieval Warm Period(MWP))and 100 a BP-present(i.e.,the Current Warm Period(CWP)).Intensified aeolian activity was associated with the strengthening of the Siberian High and cooling events at high northern *** propose that the Siberian High,under the influence of temperature changes at high northern latitudes,controlled the frequency and intensity of aeolian activity in Central *** at high northern latitudes would have si