海洋地质与第四纪地质2017，Vol.37Issue(1)：102-106,5.DOI:10.16562/j.cnki.0256-1492.2017.01.012
川东北石笋记录的334～320ka夏季风变化与影响机制
HIGH-RESOLUTION PALEOCLIMATIC RECORDS OF MIS9 IN NORTHEASTERN SICHUAN, CENTRAL CHINA
摘要
Abstract
Interglacial climate is one of the major concerns in paleoclimate investigations.The stable oxygen isotope of a stalagmite (SJ5-6) from the Songjia Cave in northeastern Sichuan,central China,which is precisely dated with 230Th dating method,show prominent paleoenvironmental changes during the MIS (marine oxygen isotope stage) 9.The stalagmite of SJ5-6 developed from 334 ka to 320 ka,a part of MIS9.The variations in δ18O of the stalagmite are interpreted as the responses to the millennial-scale fluctuations of the Asian summer monsoon intensity during 334～320 ka.The δ18O record studied is roughly parallel with the other speleothem δ18O records recovered from the Asian summer monsoon region.In particular,there is a high similarity of temperature pattern between the stalagmite SJ5-6 and the Antarctic ice core.This suggests that temperature changes over the Antarctica may play an important role in the evolution of the Asian summer monsoon during the past interglacial.关键词
石笋氧同位素/夏季风/MIS9/华中/南极影响Key words
speleothem δ18O/summer monsoon/MIS9/Central China/Antarctic influence分类
天文与地球科学引用本文复制引用
米小建,刘淑华,陈琼,赵建新,周厚云..川东北石笋记录的334～320ka夏季风变化与影响机制[J].海洋地质与第四纪地质,2017,37(1):102-106,5.基金项目
国家自然科学基金项目(41473093,40973009) （41473093,40973009）
黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG1431) （SKLLQG1431）
