EU to launch climate-attribution service for extreme weather

The European Union is launching a dedicated service under its Copernicus Climate Change programme to assess how much human-driven climate change is contributing to extreme weather events, such as heatwaves and heavy rainfall. The system will use attribution science: running simulations both with and without current greenhouse gas levels to estimate the influence of climate change on each event.

Funded with around €2.5 million over the next three years, the service will issue assessments twice a month, each within a week after an extreme event. For the first time, there will be a continuous “attribution office” dedicated to this work - rather than one-off studies.

Experts say the data generated will help governments craft more informed climate policies, allow financial institutions to quantify climate risks more precisely, and provide a robust evidential basis for legal claims tied to climate damage. Some scientists and legal practitioners have welcomed the move. They say improved attribution tools could make it easier for impacted communities to bring cases to court and for insurers to better assess exposure.

Climate attribution science has matured rapidly over the past decade, moving from academic exercise to actionable evidence. The Copernicus service - with continuous operation, twice-monthly assessments issued within a week of extreme events, and €2.5 million over three years - represents institutionalisation of what has previously been done through ad-hoc research consortia. This will materially change how climate risk is quantified in policy, finance and litigation.

For financial institutions and insurers, attribution data allows more precise pricing of climate-related physical risk in specific geographies and asset classes. For governments, it provides evidence for adaptation-priority setting and international climate-negotiation positioning.

For legal practitioners, quantified attribution supports climate-liability litigation - including damages claims against fossil-fuel companies and negligence cases against public authorities that failed to prepare for foreseeable climate risk.

For insurance companies, banks, corporates with material physical-climate exposure, and their legal advisors, Cognitud's climate action, impact assessment and sustainability due diligence teams help clients incorporate attribution science into risk assessment, structure adaptation-investment cases informed by attribution evidence, and prepare disclosures aligned with TCFD, ISSB S2 and jurisdictional climate-risk frameworks that increasingly demand quantified physical-risk analysis grounded in attribution methodology.