Changes in the climate system are becoming increasingly apparent, as are the climate-related impacts on natural and human systems. Attri- bution is the process of evaluating the contribution of one or more causal factors to such observed changes or events. Typical questions ad- dressed by the IPCC are, for example: 'To what degree is an observed change in global temperature induced by anthropogenic GHG and aero- sol concentration changes or influenced by natural variability?' or 'What is the contribution of climate change to observed changes in crop yields that are also influenced by changes in agricultural management?' Changes in the occurrence and intensity of extreme events can also be attributed, addressing questions such as: 'Have human GHG emissions increased the likelihood or intensity of an observed heat wave?'
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report