Modelling and Data Constraints Limit the Reliability of Extreme Event Attribution

Gist The World Weather Attribution WWA recently linked a severe South Asian heatwave directly to anthropogenic climate change, bringing the science of Extreme Event Attribution EEA into sharp focus. However, leading climate scientists are increasingly questioning the reliability of attributing specific, localized weather events to global warming due to severe modelling limitations and data constraints. For a civil services aspirant, understanding the limitations of EEA is crucial, as it directly impacts international climate justice arguments, loss and damage negotiations, and potential legal liabilities for major historical polluters. Background Extreme Event Attribution EEA is a branch of climate science that attempts to trace the "human fingerprint" on specific extreme weather events. The mechanism relies on two steps: detection determining if an event falls outside normal natural variations and attribution linking that abnormality specifically to human influence . Scientists achieve this by running computer simulations of a "counterfactual" pre-industrial world where atmospheric carbon dioxide levels were 280 ppm and comparing them against present-day conditions where CO₂ levels are over 420 ppm . The difference in the likelihood or magnitude of the extreme…