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《Chinese Science Bulletin》 2015-04
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Holocene abrupt climate fluctuations: Sedimentary record from the inner-shelf mud area of the East China Sea

LI XiaoYan;JIAN ZhiMin;SHI XueFa;LIU ShengFa;CAO Peng;QIAO ShuQing;ZHU ZhiWei;WANG XuChen;Key Laboratory of Marine Sedimentology and Environmental Geology,First Institute of Oceanography, State Oceanic Administration;National Key Laboratory of Marine Geology, Tongji University;College of Chemistry and Chemical Engineering, Ocean University of China;  
Sediment core MZ02 from the inner-shelf mud area of the East China Sea was studied to address paleoclimate and marine environment change during the Holocene epoch. This core was analyzed for accelerator mass spectrometry(AMS) 14 C dating, grain size, magnetic susceptibility, geochemical index(Al/Ti, Ba/Ti), oxygen isotope, and Mg/Ca ratio of benthic for a minifera. Three significant climate change events were identified, which occurred at 8.4, 7.2 and 6.2 ka BP, respectively. The sediments are characteristic of the period, with coarse grain size and smaller Mg/Ca and 18 δO values. The study revealed that the characteristics of abrupt climate fluctuation were consistent with monsoon and paleoceanographic records of the adjacent land and tropical Pacific. There are century solar cycles in the sedimentary record. The 200-year cycle is the most significant, suggesting that solar activity was the major cause of rapid climate change in the research area during the Holocene.
【Fund】: 国家自然科学基金(41006038);; 国家海洋局第一研究所基本科研业务费专项(GY02-2011G23);; 海洋公益性行业科研专项(200805063);; 我国近海海洋综合调查与评价专项(908-ZC-I-05);; 科技基础性工作专项(2008FY220300)资助
【CateGory Index】: P532
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