articleNature CommunicationsNov 28, 2024GOLD OA

Important role of Fe oxides in global soil carbon stabilization and stocks

NJNan JiaLLLei LiHGHui GuoMXMingyu Xie

Chinese Academy of Sciences · Xinjiang Institute of Ecology and Geography · +4 more institutions

PubMed
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Abstract

Iron (Fe) oxides can interact with soil organic carbon (SOC) to form Fe-bound organic carbon (OC-Fe), which strongly promotes SOC protection, mitigating global climate change. However, the global patterns and factors controlling OC-Fe are unclear. Here, we conducted a meta-analysis of 3,395 globally distributed soil profiles to reveal the role of Fe-Al oxides in global soil carbon stabilization and stocks. The global OC-Fe stock in topsoil is 233 PgC, accounting for 33 ± 15% of the total SOC stock. A substantial OC-Fe deficit (difference between OC-Fe and OC-Femax) was observed at the equator and at mid-latitudes. Our findings suggest that mineral factors should be incorporated into soil carbon models to…

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114
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33.87
Percentile
100%
References
81
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Authors

4

Topics & keywords

Topics
Keywords
  • Topsoil
  • Soil carbon
  • Carbon sequestration
  • Environmental chemistry
  • Environmental science
  • Carbon fibers
  • Total organic carbon
  • Soil organic matter
UN Sustainable Development Goals
  • Zero hunger
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