Environmental factors affecting regional differences and decadal variations in the buried flux of marine organic carbon in eastern shelf sea areas of China

Qian Yang Shu Yang Yao Sun Yan Zhang Mingying Zhou

Qian Yang, Shu Yang, Yao Sun, Yan Zhang, Mingying Zhou. Environmental factors affecting regional differences and decadal variations in the buried flux of marine organic carbon in eastern shelf sea areas of China[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-020-1601-5
Citation: Qian Yang, Shu Yang, Yao Sun, Yan Zhang, Mingying Zhou. Environmental factors affecting regional differences and decadal variations in the buried flux of marine organic carbon in eastern shelf sea areas of China[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-020-1601-5

doi: 10.1007/s13131-020-1601-5

Environmental factors affecting regional differences and decadal variations in the buried flux of marine organic carbon in eastern shelf sea areas of China

Funds: The Fund of Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture and Rural Affairs, P. R. China (2021C001), the National Key Research and Development Program of China (2018YFD0900703), the Major Scientific and Technological Innovation Project of Shandong Provincial Key Research and Development Program (2019JZZY020706).
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  • Figure  1.  Sampling stations of Cores B19, B14, A7, and H1-18. YSCC: the Yellow Sea Coastal Current; YSWC: the Yellow Sea Warm Current; WKCC: the West Korean Coastal Current.

    Figure  2.  Vertical distribution of 210Pb activities in sediment cores (squares indicate excess 210Pb (210Pbex) activities).

    Figure  3.  The interdecadal distribution of the buried flux of marine organic carbon (${\rm{BF}}_{{\rm{C}}_{\rm{m}}} $) in cores.

    Figure  4.  Linear regression analysis of ΣCm vs. Year. Cm, marine-derived organic carbon content; ΣCm is the sum Cm content of the increased Cm per year of all the previous years.

    Figure  5.  Temporal variations in the marine organic matter fraction of cores.

    Figure  6.  Temporal variations in the buried flux of marine organic carbon (${\rm{BF}}_{{\rm{C}}_{\rm{m}}} $) and biological silicon (BSi). The triangle represents BSi, the square represents ${\rm{BF}}_{{\rm{C}}_{\rm{m}}} $. BSi data are quoted from Yang et al. (2012).

    Figure  7.  Decadal changes of the buried flux of marine organic carbon (${\rm{BF}}_{{\rm{C}}_{\rm{m}}} $), Pacific Decadal Oscillation (PDO), East Asian Winter Monsoon index (EAWM) and Changjiang River Estuary Sediment load. Raw data of PDO, EAWM and Sediment load are cited from Yang et al. (2017), Huang (2015), and Wang et al. (2008), respectively.

    Table  1.   Sedimentation rate, total nitrogen content (TN), total organic carbon (TOC), the ratio of carbon content vs. nitrogen content (C/N), and marine-derived organic carbon content (Cm) in cores

    StationWater
    depth/m
    Sedimentation
    rate/(cm·a–1)
    TNTOCC/NCm
    Range/%Average/%Range/%Average/%RangeAverageRange/%Average/%
    A7870.140.050−0.0750.0640.37−0.550.466.66−7.687.230.21−0.330.28
    B14800.150.124−0.1710.1401.05−1.521.28 8.06−11.349.190.37−0.630.51
    B19430.440.039−0.0910.0570.36−0.660.436.27−9.427.520.14−0.390.26
    H1-18630.220.038−0.0500.0430.56−0.790.6712.57−17.5615.41 0.04−0.120.07
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  • 网络出版日期:  2021-05-31

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