Constraining climate model projections with observations amplifies future runoff declines

Key Points

• Runoff declines are projected to increase significantly under future climate conditions, impacting freshwater supplies.
• Findings indicate that constraining models with current observations leads to more accurate predictions, with a noted decrease in runoff trends.
• Observational analysis of climate models suggests reduced impacts on the hydrological cycle as a result of refined parameterization.
• The findings highlight the potential for improved water resource management based on enhanced climate model projections.