Which risk increases along South America during an El Niño event?

💡 Explanation

Coastal flooding and erosion becomes more likely because El Niño results in a weaker thermocline slope causing the poleward-moving undercurrent to be shallower, reducing cold-water upwelling and enabling storm surges, rather than increasing upwelling or carbon sequestation.

• Which mechanism generates tsunamis after significant seafloor displacement?
• Which geomorphic outcome occurs when slightly acidic groundwater interacts chemically with limestone?
• Which long-term outcome results when boreal pedogenesis experiences increasing temperatures?
• Which outcome accelerates lowland coastal erosion when bioturbation increases?
• Which mechanism causes coastal dune formation along lake shorelines with strong prevailing winds?
• Which outcome arises due to heightened chemical weathering?