El Niño and La Niña Effects

The video provides an overview of El Nino and La Nina, explaining their impact on global weather patterns and ocean circulation. It covers the role of trade winds, ocean gyres, and upwelling in these phenomena. The effects of El Nino and La Nina on marine ecosystems, weather patterns, and human activities are discussed, highlighting changes in nutrient distribution and weather events. The video concludes with a summary of key concepts and encourages further exploration of additional resources.

What primarily drives the global weather patterns known as El Niño and La Niña?

• Solar activity

• Ocean currents

• Trade winds

• Mountain ranges

In which direction do ocean gyres move in the northern hemisphere?

• North to South

• East to West

• Clockwise

• Counter-clockwise

What is the primary result of upwelling in marine ecosystems?

• Reduced fish populations

• Decreased salinity

• Increased water temperature

• Enhanced primary productivity

How does El Niño affect the trade winds?

• Changes their direction to north-south

• Weakens or reverses them

• Strengthens them

• Has no effect

During an El Niño year, where does warm water tend to accumulate?

• Western Pacific

• Eastern Pacific

• Indian Ocean

• Atlantic Ocean

What is a significant impact of El Niño on marine life off the coast of western South America?

• Increase in fish populations

• Decrease in nutrient levels

• Rise in water salinity

• Increase in coral reefs

How do the trade winds behave during a La Niña event?

• They stop completely

• They weaken

• They reverse direction

• They become extremely strong

What weather pattern is associated with La Niña in the southeastern United States?

• Cooler and drier

• Warmer and drier

• Colder and wetter

• Warmer and wetter

Which region experiences more torrential rainfall during La Niña years?

• North America

• Southeast Asia

• Western Europe

• Southern Africa

What is a common consequence of La Niña in the Atlantic Ocean?

• Increased sea level

• Fewer hurricanes

• More hurricanes

• No change in hurricane activity