中国岩溶2017，Vol.36Issue(2)：162-170,9.DOI:10.11932/karst20170202
MIS 5a/5b时期亚洲夏季风变化的高分辨率石笋记录
Variation of the Asian summer monsoon during the MIS 5a/5b period inferred from a new high-resolution stalagmite record
摘要
Abstract
Due to the paucity of the high-resolution records of the Asian summer monsoon (ASM) during the marine isotope stage (MIS) 5,our understanding about the ASM in this period is limited.In this study,a 38 -yr resolution stalagmite oxygen isotope record from the Yangkou Cave,Chongqing,southwestern China,is used to reconstruct the detailed evolution of the ASM during the period of MIS 5a/5b.The Yangkou record exhibits a close correlation between the ASM and the climate of the North Atlantic at a centennial-millennial-scale.In terms of the precise 230Th dating with error less than 0.4％,the onset and termination of Chinese Interstadial (CIS) 22 are constrained to 91.2±0.3 ka BP and 88.9±0.3 ka BP,respectively,and the beginning of the CIS 21 is defined at 84.6±0.3 ka BP.In addition,the evolution pattern of CIS 22 and CIS 21 recorded in the stalagmite from the Yangkou Cave is slightly different from those recorded in NGRIP,which is anti-phased with the trend of temperature change in the Antarctica.We speculate that the ASM during MIS 5a/5b may be affected by climate variation in the southern hemisphere.关键词
亚洲夏季风/石笋δ18O/深海氧同位素阶段5a/5b/230Th年代/南半球气候变化Key words
Asian summer monsoon/stalagmite δ18O/marine isotope stage 5a/5b/230Th dating/climate change in the southern hemisphere分类
天文与地球科学引用本文复制引用
张涛涛,李廷勇,韩立银,程海,李俊云,赵鑫,周菁俐..MIS 5a/5b时期亚洲夏季风变化的高分辨率石笋记录[J].中国岩溶,2017,36(2):162-170,9.基金项目
国家自然科学基金项目(41172165,41302138,41440020) （41172165,41302138,41440020）
中央高校基本科研业务费专项资金项目(XDJK2013A012,XDJK2014C010) （XDJK2013A012,XDJK2014C010）
岩溶动力学重点实验室开放基金资助课题(KDL201301)和西南大学博士基金项目(SWU114022) （KDL201301）
