Specific regional conditions and responses may simplify or complicate attribution on those scales. For example, some human forcings, such as regional land use change or aerosols, may enhance or reduce regional signals of change . In general, regional climate variations are larger than the variations in global mean climate, adding additional uncertainty to attribution . These statistical limitations may be reduced by 'process-based attribution', focusing on the physical processes known to influence the response to external forcing and internal variability .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report