Impact of La Nina and El Nino

This video, the final in Unit 4 for AP Environmental Science, covers the phenomena of El Nino and La Nina. It begins with an introduction to gyres and upwelling, explaining how these oceanic processes are influenced by the Coriolis effect and geography. The video then delves into the mechanisms and effects of El Nino, highlighting changes in weather patterns and ocean temperatures, and their impact on marine life and global climates. It also covers La Nina, contrasting its effects with those of El Nino, such as increased hurricanes and altered weather patterns. The video concludes with a recap of the unit and encourages students to ask questions for further clarification.

What is the primary cause of gyres in the ocean?

• Ocean salinity

• Tidal forces

• The Coriolis effect

• The gravitational pull of the moon

Which of the following best describes upwelling?

• The mixing of freshwater and saltwater

• The upward movement of nutrient-rich water

• The horizontal movement of ocean currents

• The downward movement of warm water

Where does equatorial upwelling typically occur?

• In the deep ocean trenches

• Along the eastern coasts

• At the equator

• Near the poles

What happens to the trade winds during an El Nino event?

• They remain unchanged

• They disappear completely

• They weaken or reverse direction

• They strengthen and move westward

How does El Nino affect marine life along the South American coast?

• Decreases nutrient availability

• Increases nutrient availability

• Increases fish populations

• Has no effect on nutrients

Which regions are most affected by the weather changes during an El Nino year?

• The Pacific and Indian Oceans

• The Atlantic Ocean

• The Arctic Ocean

• The Mediterranean Sea

What is a typical weather pattern during a La Nina event in the Pacific Northwest?

• Drier winters

• Wetter winters

• Warmer summers

• Colder summers

How does La Nina affect hurricane activity in the Atlantic?

• Decreases hurricane activity

• Increases hurricane activity

• Prevents hurricanes from forming

• Has no effect on hurricanes

What is the impact of La Nina on wheat yields in Argentina?

• Increases wheat yields

• Improves wheat quality

• Decreases wheat yields

• Has no effect on wheat yields

What should students do if they have questions after watching the video?

• Wait until the next class

• Search online for answers

• Rewatch the video or ask the teacher

• Ignore their questions