Dr. Hanifrahmawan Sudibyo, a lecturer at Indonesia’s Universitas Gadjah Mada (UGM), has been selected as a Lead Author for a crucial methodology report coordinated by the Intergovernmental Panel on Climate Change (IPCC). This global effort, which commenced with its first Lead Author Meeting at the Food and Agriculture Organization headquarters in Rome, focus on updating national greenhouse gas inventory guidelines for carbon dioxide removal, utilization, and storage. Dr. Sudibyo’s role specifically addresses carbon accounting methodologies within the agriculture, forestry, and other land use sectors. His participation ensures that the agricultural realities and rich natural resources of developing tropical nations, particularly within Southeast Asia, are accurately represented in global climate mitigation frameworks.

The prominent challenge addressed by Dr. Sudibyo and the IPCC team is the scientific ambiguity remaining in the IPCC’s 2019 Refinement regarding how biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More interacts with organic soils and peatlands. Historically, existing inventory guidelines have not explicitly determined whether incorporating biochar into organic soils triggers positive priming, which accelerates the decomposition of existing soil organic matter, or negative priming, which slows it down. Without precise, scientifically validated carbon accounting methodologies, nations cannot accurately calculate biochar’s long-term carbon persistence or its net impact on non-carbon-dioxide greenhouse gases, such as nitrous oxide and methane, in complex agricultural systems like tropical rice paddies.

To resolve these accounting limitations, the IPCC author team is developing updated, quantitative carbon-accounting frameworks that incorporate recent scientific literature from the past five years. The solution relies on evaluating physical indicators, specifically pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More temperature and the organic hydrogen-to-carbon (H/Corg) ratio, to determine the persistent carbon fraction (Fperm​) and evaluate non-persistent carbon in the broader soil carbon balance. Additionally, the team is building robust mathematical approaches to estimate biochar carbon stocks over timelines spanning up to a century. This methodology accounts for variables such as soil temperature, the vertical distribution of biochar within the soil profile, and the predominant role of negative priming in organic soils.

The successful compilation of this methodology report, scheduled for finalization in 2027 after subsequent drafting meetings in Mexico and Nepal, will deliver vital standardization tools for global climate action. By establishing precise calculation standards for mineral soils, organic soils, and peatlands, the updated IPCC guidelines will enable countries to accurately report biochar-mediated carbon stocks and non-carbon-dioxide emissions reductions. For tropical developing nations like Indonesia, these refined guidelines will provide a scientifically backed pathway to validate domestic soil carbon sequestration efforts. Ultimately, this work elevates tropical land systems within global climate policy, offering a reliable framework to incentivize large-scale biochar application worldwide.