Sources and degradation of organic carbon in the surface sediments across the Chukchi Sea, insights from lignin phenols

Wang Xinyi; Li Zhongqiao; Jin Haiyan; Zheng Hao; Chen Jianfang

doi:10.3969/j.issn.0253-4193.2017.10.002

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Wang Xinyi, Li Zhongqiao, Jin Haiyan, Zheng Hao, Chen Jianfang. Sources and degradation of organic carbon in the surface sediments across the Chukchi Sea, insights from lignin phenols[J]. Haiyang Xuebao, 2017, 39(10): 19-31. doi: 10.3969/j.issn.0253-4193.2017.10.002

Citation:

Wang Xinyi, Li Zhongqiao, Jin Haiyan, Zheng Hao, Chen Jianfang. Sources and degradation of organic carbon in the surface sediments across the Chukchi Sea, insights from lignin phenols[J]. Haiyang Xuebao, 2017, 39(10): 19-31. doi: 10.3969/j.issn.0253-4193.2017.10.002

Citation:

Wang Xinyi, Li Zhongqiao, Jin Haiyan, Zheng Hao, Chen Jianfang. Sources and degradation of organic carbon in the surface sediments across the Chukchi Sea, insights from lignin phenols[J]. Haiyang Xuebao, 2017, 39(10): 19-31. doi: 10.3969/j.issn.0253-4193.2017.10.002

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Sources and degradation of organic carbon in the surface sediments across the Chukchi Sea, insights from lignin phenols

doi: 10.3969/j.issn.0253-4193.2017.10.002

1.
Institute of Environment and Marine Chemistry, Zhejiang University, Zhoushan 316021, China;Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
3.
Institute of Environment and Marine Chemistry, Zhejiang University, Zhoushan 316021, China

Received Date: 2017-01-09
Rev Recd Date: 2017-02-16

Abstract

Abstract

Organic carbon (OC) buried in the marine sediments performs as the net sink of atmosphere CO₂. The Arctic Ocean has the largest shelf and receives a mass of terrestrial OC transported by the rivers and coastal weathering. The Chukchi Sea is one of the marginal seas of the Arctic Ocean where terrestrial OC was buried. In this study, surface sediments from the Chukchi Sea and plateau are selected and divided into two groups:the shelf (33-82.69 m) and the slope (164.63-3 763 m). Lignin phenols, in combined with stable carbon isotope (δ¹³C), OC%, grain size and specific surface area (SSA) are used to trace the sources and degradation of terrestrial organic carbon in this region. The results show that OC loading decrees dramatically from the shelf to the slope. The wide range of δ¹³C shows a multi-sourced contribution of plants like shrubs, grasses, and conifers. Gymnosperm tissue is relatively more dominant than angiosperm tissue, whereas non-woody tissue is more dominant than woody tissue upon the surface sediments of the Chukchi Sea, according to the C/V and S/V ratios. In addition, the C9DA, which is obtained from the aliphatic-rich kerogen, is relatively high among Das. This implies that kerogen can play a pregnant role in the sources of the OC in the Chukchi Sea and Plateau.
- the Chukchi Sea,
- surface sediment,
- lignin phenols,
- sources,
- degradation

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References(47)

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