ENSO-Like Pacing of the Asian Summer Monsoon during the Early Holocene  

作　　者：Xiaohua SHAO Tao WANG Yongjin WANG Hai CHENG Kan ZHAO Xinggong KONG 

机构地区：[1]School of Geography,Nanjing University of Information Science & Technology,Nanjing 210044,China [2]Public Meteorological Service Center of Anhui Province,Hefei 230031,China [3]Key Laboratory of Virtual Geographic Environment,Ministry of Education,Nanjing Normal University,Nanjing 210023,China [4]Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing 210023,China [5]Institute of Global Environmental Change,Xi’an Jiaotong University,Xi’an 710049,China [6]Department of Geology and Geophysics,University of Minnesota,MN 55455,USA

出　　处：《Journal of Meteorological Research》2020年第2期325-335,共11页气象学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(40701013,41877453,and 41572151);National Key Research and Development Program of China(2018YFA0605603)。

摘　　要：We present a230Th-dated stalagmite oxygen isotope(δ^18O)record from Loushanguan Cave in the Yangtze River valley,China.The^δ18O record,if viewed as a proxy of the Asian summer monsoon(ASM)intensity,provides an ASM history for the early Holocene with clear centennial-scale variability.A significant approximately 200-yr cycle between 10.2 and 9.1 ka BP(before present,where"present"is defined as the year AD 1950),as revealed by spectral power analyses,is of global significance and is probably forced by the Suess or de Vries cycle of solar activity.Here,we explore a physical mechanism to explain the relationship between the solar activity and the ASM.A strong coherence between the ASM and El Ni?o–Southern Oscillation(ENSO)has been observed by performing crosswavelet analyses on this cycle.Our study suggests that a strong(weak)ASM state corresponds to a warm(cold)ENSO,which is consistent with modern meteorological observations but contrasts with previous studies on regions far from the Meiyu rainbelt.We argue that the centennial fluctuations of the ASM are a fundamental characteristic forced by the solar activity,with the ENSO variability as a mediator.The relationship between ENSO and the ASM displayed spatial heterogeneity on the centennial scale during the early Holocene,which is a more direct analogue to the observed modern interannual variability of the ASM.

关 键 词：isotope records Asian summer monsoon El Nino-Southern Oscillation centennial scale solar activity Yangtze River valley early Holocene 

分 类 号：P532[天文地球—古生物学与地层学]