Which risk increases when atmospheric jet streams weaken?

💡 Explanation

Weakened jet streams promote Rossby wave amplification, so high-and-low pressure systems stall because the reduced pressure gradient weakens the geostrophic wind effect; therefore anomalous weather becomes likelier rather than fluvial, glacial, or algal changes.

• Which risk increases during volatile lava dome formation?
• What outcome occurs when differential erosion acts on cirques?
• Why may a growing lava dome collapse suddenly?
• Which outcome occurs when a subducting plate hydrates mantle peridotite?
• Which effect primarily results when coastal upwelling significantly diminishes due to weakened trade winds?
• Which risk increases along South America during an El Niño event?