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<p>The karst geological carbon sink, formed through the chemical weathering of carbonate rocks, is an important part of the global terrestrial carbon sink. It has substantial potential and plays a crucial role in the global carbon cycle and regional carbon neutrality efforts. The fifth (AR5) and sixth (AR6) assessment reports of the Intergovernmental Panel on Climate Change (IPCC) have clearly affirmed the existence of geological carbon sinks associated with the chemical weathering of carbonate rocks, stating that carbon capture and geological storage are key mitigation schemes. However, numerous studies have shown that exogenous acids are widely involved during the chemical weathering of rocks, adding complexity to the carbon sequestration process and its driving mechanisms. This increases the uncertainty in assessing the carbon sequestration potential. Therefore, a key task is to accurately estimate the geological carbon sinks generated by the chemical weathering of carbonate rocks to resolve the problem of the global carbon sink loss, balancing the carbon budget, and achieving carbon neutrality. In this review, we examine assessments of the carbonate rocks chemical weathering carbon sink influenced by exogenous acids, focusing on the principles, frameworks and methodologies of carbon sink estimation. We also highlight recent advancements, key influencing factors, and underlying driving mechanisms. Looking ahead, we highlight key challenges in enhancing the accuracy and precision of carbonate rocks chemical weathering carbon sink assessments under the influence of exogenous acids. Addressing these issues will support more informed policy decisions on pathways to global carbon neutrality.</p>

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Assessment of carbon sinks caused by the chemical weathering of carbonate rocks under the influence of exogenous acids: Methods, progress, and prospects

  • 期刊论文

  • 发表日期：

    2025年5月19日

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  • Luhua Wu,
  • Xiaoyong Bai,
  • Chaojun Li,
  • Huiwen Li,
  • Yue Cao,
  • Chen Ran,
  • Sirui Zhang,
  • Lian Xiong,
  • Chaochao Du,
  • Guangjie Luo,
  • Fei Chen,
  • Heng Wei,
  • Dan Chen,
  • Dongni Yang,
  • Lusha Xiong,
  • Jianlan Jia

摘要

The karst geological carbon sink, formed through the chemical weathering of carbonate rocks, is an important part of the global terrestrial carbon sink. It has substantial potential and plays a crucial role in the global carbon cycle and regional carbon neutrality efforts. The fifth (AR5) and sixth (AR6) assessment reports of the Intergovernmental Panel on Climate Change (IPCC) have clearly affirmed the existence of geological carbon sinks associated with the chemical weathering of carbonate rocks, stating that carbon capture and geological storage are key mitigation schemes. However, numerous studies have shown that exogenous acids are widely involved during the chemical weathering of rocks, adding complexity to the carbon sequestration process and its driving mechanisms. This increases the uncertainty in assessing the carbon sequestration potential. Therefore, a key task is to accurately estimate the geological carbon sinks generated by the chemical weathering of carbonate rocks to resolve the problem of the global carbon sink loss, balancing the carbon budget, and achieving carbon neutrality. In this review, we examine assessments of the carbonate rocks chemical weathering carbon sink influenced by exogenous acids, focusing on the principles, frameworks and methodologies of carbon sink estimation. We also highlight recent advancements, key influencing factors, and underlying driving mechanisms. Looking ahead, we highlight key challenges in enhancing the accuracy and precision of carbonate rocks chemical weathering carbon sink assessments under the influence of exogenous acids. Addressing these issues will support more informed policy decisions on pathways to global carbon neutrality.