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Climate Models Understate Economic Damage
Coverage from Grantham Research Institute on Climate Change and the Environment, Nature Climate Change, and others
Research and investor analysis indicate that widely used climate-risk models may understate physical damages by relying on global average temperatures, GDP effects, and historical relationships that do not fully capture extreme events, tipping points, or cascading disruption.
The gap matters for governments, central banks, pension funds, insurers, and asset managers because understated risks can affect capital allocation, valuations, resilience planning, and financial stability. UK-specific analysis illustrates the range of potential exposure, while broader research calls for models that include regional shocks, inequality, mortality, supply-chain effects, and low-probability high-impact outcomes.
The story is largely stable, but the current version reframes it more explicitly as a financial-stability and portfolio-allocation issue affecting a wider set of stakeholders. It also sharpens the modelling critique by stressing structural, compounding disruption rather than gradual GDP losses.
The story has broadened from a critique of GDP-based climate damage models into a more explicit claim that physical climate risk is already showing up in financial portfolios and could produce very large near-term losses. It also adds more concrete institutional and research actors behind the push for broader risk modeling.