Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Marine Geology & Quaternary Geology》 2018-05
Add to Favorite Get Latest Update

Variation of East Asian summer monsoon since MIS3 recorded by an absolutely-dated stalagmite from north China

DONG Jinguo;DONG Mengcai;AO Guifu;HUANG Jiangnan;College of Geography Science,Nantong University;  
The high-resolution oxygen isotope sequence established upon100 oxygen isotope samples and8 ~(230 )Th dates from the Dragon Cave,Shanxi province,north China,provides a detailed history of East Asian summer monsoon(EASM)variation since Marine Isotope Stages(MIS)3.The sample L8 grew discontinuously during the periods from58.0to54.5 kaBP,27.1to18.0kaBP,6.8 to 3.9 kaBP,respectively.On the orbital scale,the long-term trend of theδ~(18 )O record generally follow the North Hemisphere Insolation changes.However,the L8δ~(18 )O value abruptly increased by1‰at 24.5 kaBP,indicating an abrupt weak monsoon event possibly associated with the Heinrich event 2in the North Atlantic region.Moreover,gradual enrichment ofδ~(18 )O since~6 kaBP also indicates steadily weakening of EASM,responding to southward retreat of the Intertropical Convergence Zone.During the early MIS3,our record shows two millennial-scale strong summer events,analogous in timing and structure to the Greenland Dansgaard-Oeschger events 16-15.The latter event(DO15)exhibits two distinct phases,consistent with the centennial shifts in Greenland temperature changes.This relationship reveals a tight coupling between high-and low-latitude climates at sub-millennial scales,implying a role of the large-scale ocean-atmosphere circulation in linking Greenland temperature and the Asian monsoon.
【Fund】: 国家自然科学基金项目“黄土高原末次冰期以来气候变化模式及突变事件的高分辨率石笋记录研究”(41472317);; 江苏省高校优秀中青年教师和校长境外研修计划
【CateGory Index】: P532
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved