An Assigned Amount Unit (AAU) is a financial instrument used in the context of international emissions trading, particularly under the Kyoto Protocol. It represents a specific quantity of greenhouse gas emissions that a country is allowed to emit during a defined commitment period. Each AAU corresponds to one metric ton of carbon dioxide equivalent (CO2e) emission allowances.
In finance, AAUs function as tradeable commodities. Countries or entities that reduce their emissions below their assigned amounts can sell their surplus AAUs to others that exceed their limits. This trading mechanism incentivizes emissions reductions by placing a market value on carbon emissions and allowing countries flexibility in how they meet their reduction targets.
The relevance of AAUs extends to climate finance, as they facilitate investment in clean technologies and sustainable practices. By creating a market for emissions allowances, AAUs help achieve international climate goals while promoting financial flows toward more environmentally friendly initiatives.
