Which method best characterizes how scientists attribute extreme weather events to climate change?

• A. Historical trend analysis alone.
• B. Attribution studies using climate models to quantify the contribution of climate change.
• C. High-resolution forecasts during the event.
• D. Post-event surveys of affected communities.

Answer: (B)

Attribution of extreme weather to climate change relies on formal attribution studies that use climate models to quantify climate-change contributions. Scientists run simulations of the climate with and without human-caused greenhouse gas forcing, often using many ensemble runs to see how the event’s probability or magnitude would differ under different conditions. This approach blends physical understanding of atmospheric processes with observations to separate natural variability from the forced signal, enabling statements like how much more likely an event became or how much stronger it was because of warming. High-resolution forecasts during the event predict what will happen given current conditions, not how the event’s risk changes due to ongoing climate change. Historical trend analysis alone can reveal warming over time but doesn’t isolate whether a specific extreme event was made more likely by climate change. Post-event surveys describe impacts, not causal attribution to climate change.