Acta Geographica Sinica ›› 2023, Vol. 78 ›› Issue (9): 2209-2222.doi: 10.11821/dlxb202309006

• Land Use and Carbon Peak & Carbon Neutrality • Previous Articles     Next Articles

Estimation of soil carbon storage change from land use and management at a high spatial resolution in China during 2000-2020

TONG Rongxin1,2(), LIANG Xun1,2,3(), GUAN Qingfeng1,2,3, SONG Yu1, CHEN Yuling3, WANG Qinyi2,3, ZHENG Lina4, JIN Qun4, YU Yanping4, HE Jie5, XIONG Xuehui6, LIAO Weilin7   

  1. 1. National Engineering Research Center for Geographic Information System, China University of Geosciences, Wuhan 430078, China
    2. Technology Innovation Center for Intelligent Monitoring and Spatial Regulation of Land Carbon Sink, MR of China, China University of Geosciences, Wuhan 430078, China
    3. School of Geography and Information Engineering, China University of Geosciences, Wuhan 430078, China
    4. Information Center of Department of Natural Resources of Hubei Province, Wuhan 430071, China
    5. Geological Environmental Center of Hubei Province, Wuhan 430034, China
    6. Guangdong Province Academy of Environmental Science; Guangzhou 510045, China
    7. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2022-11-11 Revised:2023-06-12 Online:2023-09-25 Published:2023-09-28
  • Contact: LIANG Xun E-mail:tongrx@cug.edu.cn;liangxun@cug.edu.cn
  • Supported by:
    National Natural Science Foundation of China(42271437);National Natural Science Foundation of China(42171466);Scientific Research Program of the Department of Natural Resources of Hubei Province(ZRZY2022KJ12)

Abstract:

Soil organic carbon (SOC) storage and soil carbon sinks play a crucial role in the global carbon cycle of terrestrial ecosystem. However, many previous studies of soil carbon storage and sinks utilized low-resolution land use dataset, with limited focus on soil carbon sinks from farmland and grassland management. To address this issue, this study employed a series of accounting models to estimate the carbon sink from farmland and grassland management, the carbon sink from forest management, changes in soil carbon storage, changes in carbon storage due to land use conversion from 2000 to 2020, as well as the soil carbon storage in China in 2000 and 2020 using a 30 m-resolution land use dataset. The results showed that the national carbon sink from farmland management in China was approximately 17.918 Tg C a-1 and the carbon sink from grassland management was approximately 20.171 Tg C a-1 during 2000-2020. The carbon sink from forest management in China was approximately 81.622 Tg C a-1 during 2000-2020. The soil carbon storage (0-100 cm) in China increased from 86.074 Pg C in 2000 to 86.771 Pg C in 2020. The soil carbon storage increased by approximately 34.850 Tg C a-1 from 2000 to 2020. The land use transformation during the study period resulted in a decrease of approximately 17.621 Tg C a-1 in soil carbon storage. The findings of this study can help researchers understand China's carbon storage and provide scientific data to China's 2060 Carbon Neutrality Target.

Key words: soil carbon storage, carbon sinks, high resolution, land use change, carbon sinks from management