All Flashcards
What are the steps of El Niño development?
- Trade winds weaken or reverse. 2. Warm water shifts eastward. 3. Thermocline deepens.
What are the steps of La Niña development?
- Trade winds strengthen. 2. Warm water shifts westward. 3. Upwelling increases; thermocline rises.
What drives ENSO events?
Changes in ocean temperatures and atmospheric pressure in the tropical Pacific.
How do trade winds affect El Niño?
Trade winds weaken or reverse, causing warm water to shift eastward.
How do trade winds affect La Niña?
Trade winds strengthen, pushing warm water further west.
How does El Niño affect the thermocline?
The thermocline deepens, meaning less cool water is near the surface.
How does La Niña affect the thermocline?
The thermocline moves upward, reducing the volume of warm water near the surface.
What is the relationship between El Niño and global warming?
During El Niño, the ocean's ability to absorb heat decreases, contributing to global warming.
How does ENSO affect precipitation patterns?
Both El Niño and La Niña cause shifts in precipitation patterns, leading to increased risks of floods and droughts.
How does ENSO affect species?
Rapid climate changes can force species to relocate, disrupting ecosystems and altering migration patterns.
What is the effect of weakened trade winds?
Warm surface water moves eastward toward the coast of South America (El Niño).
What is the effect of strengthened trade winds?
Warm surface water is pushed further west, away from the South American coast (La Niña).
What are the effects of El Niño on South America?
Drier regions experience higher rainfall, often leading to flooding.
What are the effects of El Niño on the southeastern US?
Colder and wetter winters.
What are the effects of La Niña on the southeastern US?
Warmer and drier conditions.
What are the effects of ENSO on species?
Rapid climate changes can force species to relocate, disrupting ecosystems.
How does El Nino affect global climate?
Changes in ocean temperature can affect weather patterns around the world, potentially leading to droughts in some areas and flooding in others.