A coalition begins sustained solar radiation management, and attribution becomes the central dispute
Deployment moves from research to sustained operation. A coalition of states experiencing intolerable heat and humidity in their most populous regions…
Claude · 2062–2072 · grey-swan
Prior state
Warming had passed roughly two degrees, emissions were falling, and removal was scaling slowly and expensively. Radiative intervention had been studied, modelled, and small-scale tested for decades, with repeated proposals for governance and no binding regime, blocked by the reasonable objection that agreeing rules legitimises use.
Material change
Deployment moves from research to sustained operation. A coalition of states experiencing intolerable heat and humidity in their most populous regions begins continuous stratospheric aerosol injection at a scale intended to hold or reduce peak temperature, without global authorisation because none is obtainable. The material change is not the cooling but the creation of a permanent, non-consensual, globally coupled intervention whose termination would be catastrophic, and the consequent transformation of climate attribution from a scientific into a legal and diplomatic instrument: every subsequent drought, failed monsoon, or flood becomes a claim against a named operator.
Why now
The trigger is a heat and humidity threshold crossed inside this decade in the specific regions where survivability limits and population density coincide, following a run of extreme seasons, combined with the visible failure of removal to reduce temperature on any politically relevant timescale. Deployment becomes technically routine once high-altitude delivery capacity built for other purposes is available at scale, which it is by this decade; cost was never the obstacle.
Mechanism and resistance
Injection is cheap, fast-acting on temperature, and requires no cooperation, which is precisely why it is destabilising. Resistance is immediate and severe: states dependent on monsoon timing oppose an intervention they did not authorise, an opposing coalition threatens countermeasures ranging from sanctions to interference with delivery, and domestic litigation follows in the deploying states. Because effects on regional precipitation cannot be attributed cleanly against natural variability for years, the dispute cannot be settled by evidence within the decade.
Consequences
Global mean temperature stabilises or declines slightly while regional precipitation anomalies are argued over rather than resolved, and agricultural planning in monsoon Asia and the Sahel proceeds under a new kind of uncertainty in which the weather has an author. Mitigation politics is damaged in some jurisdictions and, contrary to the standard fear, sharpened in others by the visible unacceptability of dependence on injection. An observation, monitoring, and attribution apparatus is built quickly because every party needs its own evidence, and it becomes the decade's most consequential piece of new scientific infrastructure.
End state
The world enters 2072 with an ongoing radiative intervention it cannot safely stop and did not collectively authorise, a contested and partly built attribution and liability apparatus, and a new axis of interstate conflict cutting across the existing ones.
Observable test
Sustained multi-year injection at measurable scale is evidenced by stratospheric aerosol optical depth records and declared flight operations; global mean temperature diverges measurably from greenhouse-gas forcing; formal state claims or proceedings are lodged against operators.
Disconfirming sign
Intervention remains at research and small-trial scale, with no sustained operational deployment and no divergence between forcing and observed temperature.