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🌍 '''Climate modeling''' in the insurance context refers to the use of scientific and statistical models to simulate how long-term shifts in climate patterns — including rising temperatures, changing precipitation regimes, sea-level rise, and increased frequency or severity of extreme weather events — affect insured losses, [[Definition:Risk assessment | risk assessment]], and portfolio management. Unlike traditional [[Definition:Catastrophe model | catastrophe models]] that focus on the current hazard environment, climate models project how physical risks evolve over future time horizons spanning decades, making them essential for strategic planning, [[Definition:Reserving | reserving]] for long-duration liabilities, and pricing [[Definition:Property insurance | property]], [[Definition:Agriculture insurance | agricultural]], and [[Definition:Casualty insurance | casualty]] exposures in a warming world.

⚙️ Insurers and [[Definition:Reinsurer | reinsurers]] integrate climate modeling into their operations through several channels. At the underwriting level, models developed by vendors such as [[Definition:Moody's RMS | RMS]], [[Definition:Verisk | AIR Worldwide]], and specialized climate analytics firms layer future climate scenarios — often aligned with Intergovernmental Panel on Climate Change (IPCC) pathways — onto existing [[Definition:Catastrophe model | catastrophe model]] frameworks to adjust [[Definition:Expected loss | expected loss]] estimates for perils such as tropical cyclones, wildfires, inland flooding, and drought. At the enterprise level, [[Definition:Solvency II | Solvency II]] regulators in Europe, the UK's Prudential Regulation Authority, and supervisors in markets including Singapore, Hong Kong, and Australia have introduced climate stress testing and scenario analysis requirements that compel insurers to quantify the financial impact of various warming trajectories on their [[Definition:Asset-liability management (ALM) | asset and liability]] positions. Japan's Financial Services Agency and China's [[Definition:C-ROSS | C-ROSS]] framework are also increasingly incorporating climate-related risk assessments. On the asset side, climate models inform [[Definition:Investment | investment]] strategies by identifying transition risks in carbon-intensive sectors held in insurer portfolios.

💡 The stakes of getting climate modeling right are enormous — and the consequences of ignoring it are already materializing. Regions once considered low-risk for certain perils are experiencing unprecedented loss events: record wildfire seasons, intensifying hurricanes, and urban flooding driven by heavier rainfall. Insurers that fail to incorporate forward-looking climate projections risk mispricing multi-year policies, accumulating unsustainable [[Definition:Catastrophe | catastrophe]] exposures, and facing [[Definition:Rating agency | rating agency]] downgrades for inadequate risk governance. At the same time, climate modeling remains an evolving discipline fraught with deep uncertainty — model outputs diverge significantly depending on emission scenarios, time horizons, and regional downscaling techniques. The insurance industry sits at a unique crossroads: it possesses decades of granular loss data and sophisticated modeling infrastructure, yet must grapple with the reality that the past may no longer reliably predict the future. How well insurers bridge this gap will shape the industry's relevance and solvency for generations to come.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Catastrophe model]]
* [[Definition:Natural catastrophe (Nat Cat)]]
* [[Definition:Climate risk]]
* [[Definition:Stress testing]]
* [[Definition:Solvency II]]
* [[Definition:Risk assessment]]
{{Div col end}}

Definition:Climate modeling - Revision history

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