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Carbonate Mineral Dissolution and Its Carbon Sink Effect in Chinese Loess

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  • Mingyu Shao

    (Institute of Karst Geology, CAGS/Key Laboratory of Karst Ecosystem and Rocky Desertification, Ministry of Natural Resources, Guilin 541004, China
    Ministry of Natural Resources, Guangxi Key Laboratory of Karst Dynamics, Guilin 541004, China)

  • Muhammad Adnan

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Liankai Zhang

    (Kunming Comprehensive Survey Center of Natural Resources, China Geological Survey, Kunming 650111, China
    Technology Innovation Center for Natural Ecosystem Carbon Sink, Ministry of Natural Resources, Kunming 650111, China)

  • Pengyu Liu

    (Institute of Karst Geology, CAGS/Key Laboratory of Karst Ecosystem and Rocky Desertification, Ministry of Natural Resources, Guilin 541004, China
    Ministry of Natural Resources, Guangxi Key Laboratory of Karst Dynamics, Guilin 541004, China)

  • Jianhua Cao

    (Institute of Karst Geology, CAGS/Key Laboratory of Karst Ecosystem and Rocky Desertification, Ministry of Natural Resources, Guilin 541004, China
    Ministry of Natural Resources, Guangxi Key Laboratory of Karst Dynamics, Guilin 541004, China)

  • Xiaoqun Qin

    (Institute of Karst Geology, CAGS/Key Laboratory of Karst Ecosystem and Rocky Desertification, Ministry of Natural Resources, Guilin 541004, China
    Ministry of Natural Resources, Guangxi Key Laboratory of Karst Dynamics, Guilin 541004, China)

Abstract

The relationship between the source and sink of atmospheric CO 2 has always been a widely discussed issue in global climate change research. Recent studies revealed that the chemical weathering of carbonate rocks contributed to 1/3 (~0.5 Pg C/yr) of the missing carbon sinks (MCS) globally, and there are still 2/3 of MCS (~0.5 Pg C/yr) that need to be explored. As one of the main overburdened parts of the earth, loess is one of the important driving factors for atmospheric CO 2 consumption. Here, we elaborated on the dissolution process and the carbon sink effect from carbonate and silicate minerals in loess. The relationship between carbonate dissolution and carbon source/sink is elucidated, and the mechanism of carbon sink formation from secondary carbonates in loess is clarified. Additionally, the commonly used methods for the identification of primary and secondary carbonates are summarized, and the methods for the study of loess carbon sinks and the influencing factors of loess carbon sinks are also revealed. Based on the research results and progress interpretations, the prospects of loess carbon sinks are discussed to provide a scientific basis for further research on loess carbon sinks.

Suggested Citation

  • Mingyu Shao & Muhammad Adnan & Liankai Zhang & Pengyu Liu & Jianhua Cao & Xiaoqun Qin, 2022. "Carbonate Mineral Dissolution and Its Carbon Sink Effect in Chinese Loess," Land, MDPI, vol. 12(1), pages 1-17, December.
    • Handle: RePEc:gam:jlands:v:12:y:2022:i:1:p:133-:d:1021601
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    References listed on IDEAS

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    1. David W. Schindler, 1999. "The mysterious missing sink," Nature, Nature, vol. 398(6723), pages 105-107, March.
    2. Gaohuan Liu & Zhonghe Zhao, 2018. "Analysis of Carbon Storage and Its Contributing Factors—A Case Study in the Loess Plateau (China)," Energies, MDPI, vol. 11(6), pages 1-18, June.
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