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Spatial–Temporal Variations in Soil Organic Carbon and Driving Factors in Guangdong, China (2009–2023)

Author

Listed:
  • Mi Tian

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Chao Wu

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Xin Zhu

    (Guangdong Geological Survey Institute, Guangzhou 510440, China)

  • Qinghai Hu

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Xueqiu Wang

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Binbin Sun

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Jian Zhou

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Wei Wang

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Qinghua Chi

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Hanliang Liu

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Yuheng Liu

    (Key Laboratory of Geochemical Exploration, Institute of Geophysical and Geochemical Exploration, Langfang 065000, China
    International Centre on Global-Scale Geochemistry, Langfang 065000, China)

  • Jiwu Yang

    (Guangdong Geological Survey Institute, Guangzhou 510440, China)

  • Xurong Li

    (Guangdong Geological Survey Institute, Guangzhou 510440, China)

Abstract

Spatial–temporal variation in soil organic carbon is an important factor for national targets to mitigate climate change and land degradation impacts. In this research, we took Guangdong Province of China as the study area, evaluated the spatial–temporal distributions of soil organic carbon using data from three China Geochemical Baseline projects (conducted in 2009, 2016, and 2023, respectively), and quantified the main driving factors of spatial–temporal variations in soil organic carbon using the random forest algorithm, further predicting the density and inventories of soil organic carbon. The results demonstrate that the mean value of SOC in Guangdong in 2009 was 0.81%; in 2016 it was 1.13%; and in 2023 it was 1.02%. The inventories of soil organic carbon (0–30 cm) in Guangdong Province were 0.61 Pg in 2009, 0.74 Pg in 2016, and 0.62 Pg in 2023. Soil in Guangdong acted as a carbon sink from 2009 to 2023 as a whole, and the most important driving force behind spatial–temporal variations in soil organic carbon was temperature, followed by precipitation and vegetation cover.

Suggested Citation

  • Mi Tian & Chao Wu & Xin Zhu & Qinghai Hu & Xueqiu Wang & Binbin Sun & Jian Zhou & Wei Wang & Qinghua Chi & Hanliang Liu & Yuheng Liu & Jiwu Yang & Xurong Li, 2024. "Spatial–Temporal Variations in Soil Organic Carbon and Driving Factors in Guangdong, China (2009–2023)," Land, MDPI, vol. 13(7), pages 1-18, July.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:7:p:1096-:d:1439215
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    References listed on IDEAS

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