Termination shock warnings spark geoengineering risk debate
Executive summary: A coalition of prominent climate scientists issued a joint warning about the potential for termination shock from large‑scale solar geoengineering, urging broader discussion and risk assessment. The warning highlights the possibility of irreversible climate disruption and informs policymakers about the need for regulatory oversight of experimental climate interventions. Raymond Pierrehumbert, Julia Slingo, Michael Mann, Valerie Masson-Delmotte, and The Guardian (publisher). Further scientific review, potential parliamentary inquiries, and increased funding for risk‑assessment studies are expected in the coming months.
On 19 June 2026, a group of leading climate scientists published a joint briefing warning that uncontrolled geoengineering could trigger a rapid climate reversal known as termination shock. The statement, signed by Raymond Pierrehumbert, Julia Slingo, Michael Mann and Valerie Masson-Delmotte, calls for rigorous risk assessment before any deployment. It notes that current research remains speculative and that policy frameworks are insufficient. The article emphasizes the need for transparent international oversight.
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