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The burial of permafrost organic carbon in the Chukchi Sea and its response to climate change in the past 200 years
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Qianqian Wu1, 2, Zhongqiao Li1, 2, *, Song Zhang1, 2, Jian Ren1, 2, Youcheng Bai1, 2, Zhongqiang Ji1, 2, Hongliang Li1, 2, 3, Haiyan Jin1, 2, Jianfang Chen1, 2, 4
Haiyang Xuebao | 2024, 46(9) : 29 - 37
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Haiyang Xuebao | 2024, 46(9): 29-37
• Article •
The burial of permafrost organic carbon in the Chukchi Sea and its response to climate change in the past 200 years
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Qianqian Wu1, 2, Zhongqiao Li1, 2, *, Song Zhang1, 2, Jian Ren1, 2, Youcheng Bai1, 2, Zhongqiang Ji1, 2, Hongliang Li1, 2, 3, Haiyan Jin1, 2, Jianfang Chen1, 2, 4
Affiliations
  • 1. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
  • 2. Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources, Hangzhou 310012, China
  • 3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
  • 4. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
Published: 2024-09-01 doi: 10.12284/hyxb2024112
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Against the backdrop of global warming, the Arctic has experienced a series of changes, including permafrost degradation, reduced summer sea ice, increased land runoff, and intensified coastal erosion. With global warming, organic carbon (OC) stored in permafrost is accelerating its migration and release to the sea, which will affect the pattern of carbon cycling in the Arctic Ocean. However, there is currently little evidence to directly confirm this inference. This article analyzes the lignin and carbon isotopes of two hundred year scale sedimentary cores in the Chukchi Sea, and discusses the sources and profile changes of the buried organic matter. The results showed that the organic carbon in the columnar sediments of the Chukchi Sea came from a mixed contribution of herbaceous tissue of terrestrial C3 plants and marine source production. The absolute content of lignin Σ8 in sediment shows an overall upward trend, indicating that with global warming, more terrestrial materials are being transported to the Chukchi Sea. This study indicates that global warming caused by human activities has indeed increased the migration of organic carbon from permafrost to the sea, and the increase in lignin content due to enhanced terrestrial inputs is direct evidence of the enhanced melting of permafrost caused by global warming on a century scale.

Arctic  /  global warming  /  permafrost  /  lignin  /  organic carbon  /  Chukchi Sea
Qianqian Wu, Zhongqiao Li, Song Zhang, Jian Ren, Youcheng Bai, Zhongqiang Ji, Hongliang Li, Haiyan Jin, Jianfang Chen. The burial of permafrost organic carbon in the Chukchi Sea and its response to climate change in the past 200 years[J]. Haiyang Xuebao, 2024 , 46 (9) : 29 -37 . DOI: 10.12284/hyxb2024112
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Article Info
doi: 10.12284/hyxb2024112
  • Receive Date：2024-05-23
  • Online Date：2025-11-26
  • Published：2024-09-01
Article Data
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History
  • Received：2024-05-23
  • Revised：2024-05-31
  • Accepted：2024-08-12
Funding
Affiliations
    1. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
    2. Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources, Hangzhou 310012, China
    3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
    4. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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