Climate of the Past
Climate of the Past
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Articles | Volume 19, issue 7
Articles | Volume 19, issue 7
https://doi.org/10.5194/cp-19-1305-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-19-1305-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 7
Research article
 | 
05 Jul 2023
Research article |  | 05 Jul 2023

Changing sources and burial of organic carbon in the Chukchi Sea sediments with retreating sea ice over recent centuries

Liang Su, Jian Ren, Marie-Alexandrine Sicre, Youcheng Bai, Ruoshi Zhao, Xibing Han, Zhongqiao Li, Haiyan Jin, Anatolii S. Astakhov, Xuefa Shi, and Jianfang Chen

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Short summary
We reconstructed sea ice and organic carbon composition variabilities based on biomarkers and carbon stable isotopes in the northern Chukchi Sea, western Arctic Ocean, over the past 200 years. Under permanent ice cover, organic carbon was dominated by land sources transported by sea ice and ocean currents, while local primary productivity was suppressed by light limitation. Since ice retreated in 20th century, organic carbon from primary production gradually overtook the terrestrial component.
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