To provide accurate national forest carbon stock data to support informed decision-making in sustainable forest management policies and to facilitate balanced public discussions on the role of forests in climate change mitigation.

Generate precise data on national forest carbon stocks to support evidence-based policymaking and public discourse.

Develop and pilot-test accurate standing-tree carbon equations and create a forest carbon stock map in Ngao Demonstration Forest, Lampang Province.

Formulate an action plan for constructing and promoting national standing-tree carbon equations.

Development and pilot testing of a methodology for constructing new tree carbon equations.

Demonstration of tree carbon equation applications through the creation of a carbon stock map.

Preparation of an action plan for the construction and nationwide promotion of standing-tree carbon equations.

Dissemination of project findings and knowledge among relevant stakeholders.

This project advanced Thailand’s capacity to estimate forest carbon stocks by developing standing-tree carbon equations tailored to three forest types (Mixed Deciduous, Dry Dipterocarp, Dry Evergreen). The derived general equation, C = 0.012348(D².¹⁶⁷⁶ H⁰.⁶⁵³⁹), enabled precise carbon storage calculations. Validation through ground data confirmed the carbon map’s accuracy (92.87% alignment).

Key impacts include challenging Thailand’s use of the IPCC default carbon conversion factor (0.47), suggesting a slight increase to 0.48 for more accurate national reporting. The project also produced a national action plan to expand methodologies across all forest types, enhancing carbon credit transparency and policy decisions.

Knowledge dissemination occurred via workshops, technical reports, a project website, and brochures, engaging stakeholders like the Royal Forest Department and international bodies. Sustainability efforts focus on scaling the initiative nationally, with Kasetsart University seeking funding to implement the action plan.