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      Linking Monsoon Activity with River-Derived Sediments Deposition in the Northern South China Sea

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          The history of the East Asian monsoon (EAM) since Last Glacial Maximum is reconstructed based on records in a sediment core retrieved from the northern South China Sea. The provenance of organic carbon and the EAM’s evolution are investigated using combined organic carbon, grain size, and AMS 14C dating analysis. Responding to the strong winter monsoon, the marine organic matter was dominated in the sediments, and δ 13C of organic matter was high during the last glacial period. During the Holocene, the primary productivity decreased and the dilution effect of riverine inorganic clastics strengthened. Accordingly, the total organic carbon contents and δ 13C values decreased, and terrestrial organic matter content increased in the core sediments. The 4 μm grain size fraction, as the environmental sensitive grain size component, is determined to reconstruct the paleoclimatic records. During the last glacial period, the contents of 4 μm grain size component were mainly controlled by the sea level changes. Upon the Holocene, the influence of the sea level changes weakened and the roles of current system and provenance strengthened. The correlation between the EAM and solar insolation forcing is also discussed in this paper.

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          Author and article information

          Journal of Ocean University of China
          Science Press and Springer (China )
          24 August 2019
          01 October 2019
          : 18
          : 5
          : 1098-1104
          1Key Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China
          2Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
          3Key Laboratory of Physical Oceanography, Ocean University of China, Qingdao 266100, China
          Author notes
          *Corresponding authors: GE Qian and XU Dong
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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