Remineralization of sedimentary organic carbon in river dominated ocean margins

Yao Peng; Guo Zhigang; Yu Zhigang

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Yao Peng, Guo Zhigang, Yu Zhigang. Remineralization of sedimentary organic carbon in river dominated ocean margins[J]. Haiyang Xuebao, 2014, 36(2): 23-32.

Citation:

Yao Peng, Guo Zhigang, Yu Zhigang. Remineralization of sedimentary organic carbon in river dominated ocean margins[J]. Haiyang Xuebao, 2014, 36(2): 23-32.

Yao Peng, Guo Zhigang, Yu Zhigang. Remineralization of sedimentary organic carbon in river dominated ocean margins[J]. Haiyang Xuebao, 2014, 36(2): 23-32.

Citation:

Yao Peng, Guo Zhigang, Yu Zhigang. Remineralization of sedimentary organic carbon in river dominated ocean margins[J]. Haiyang Xuebao, 2014, 36(2): 23-32.

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Remineralization of sedimentary organic carbon in river dominated ocean margins

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Qingdao 266100, China;Institute of Marine Organic Geochemistry, Ocean University of China, Qingdao 266100, China
2.
Department of Environment Science and Engineering, Fudan University, Shanghai 200433, China

Received Date: 2013-01-22

Abstract

Abstract

River dominated ocean margins (RiOMars) are the major depocenter of terrestrial organic carbon and are recognized as the most important zone for land-sea interactions, and play a very important role in global biogeochemical cycle of carbon. Effective remineralization of sedimentary organic carbon (SOC) occurs in these systems instead of efficient preservation and burial due to frequent physical and/or biological reworking of sediments in upper layer. In this paper, we introduced two kinds of commonly used methods for the determination of remineralization rate of SOC based on the consumption of O₂ and production of CO₂, respectively. Advantages, disadvantages and applicability of these methods were analyzed. In order to obtain a better understanding of the remineralization of SOC and its impact on carbon sink in continental margins, major processes and characteristics of the remineralization of SOC in RiOMars were summarized into several aspects including transformation of carbon forms, homogeneous vertical distribution of surface sediments, suboxic redox properties, low preservation of organic carbon, occurrence of "reverse weathering" and high microbial biomass.
- river dominated ocean margins,
- sedimentary organic carbon,
- remineralization,
- reverse weathering,
- priming effects

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References(33)

References

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