Records of the East Asian winter monsoon from the mud area on the inner shelf of the East China Sea since the mid-Holocene

• 来源期刊: 科学通报(英文版)
• 学科: 地球科学
• 关键词: 东亚冬季风 中全新世 Sea 内陆架 中期 中国 亚洲 面积
• 年，卷（期）: 2010,（21）
• 所属期刊栏目: ARTICLES
• 页码范围: 2306-2314
• 页数: 9页
• 分类号: P425.42 P532
• 语种: 英文

摘要

AMS14C dating and analysis of grain size,major elements and clay minerals were applied to Core MZ01 from the mud area on the inner shelf of the East China Sea.Based on the environmentally sensitive grain size,clay mineral and major element assemblages,the history of the East Asia winter monsoon since the mid-Holocene could be reconstructed.These three proxies,mean grain size(9.71μm),chemical index of alteration(CIA)and ratio of smectite to kaolinite in particular,show similar fluctuation patterns. Furthermore,10 extreme values corresponding to the contemporary cooling events could be recognized since the mid-Holocene;these extreme values are likely to have been caused by the strengthening of the East Asia winter monsoon.The cooling events correlated well with the results of theδ18O curves of the Dunde ice core and GISP2,which therefore revealed a regional response to global climate change.Four stages of the East Asia winter monsoon were identified,i.e.8300-6300 a BP,strong and unstable;6300-3800 a BP,strong but stable;3800-1400 a BP,weak and unstable;after 1400 a BP,weak but stable.