3.4 El Niño, La Niña, and the Southern Oscillation

strong easterly winds pushing warm water to the western Pacific

weak westerly winds allowing cold water to accumulate in the eastern Pacific

weak easterly winds allowing warm water to accumulate in the eastern Pacific

It is a measure of atmospheric pressure differences between Tahiti and Darwin.

It is a measure of rainfall patterns in the Indian and Pacific Oceans.

It is a measure of the movement of ocean currents in the Pacific Ocean.

increased crop yield due to more rainfall

decreased crop yield due to drought

increased crop yield due to warm weather

The western Indian Ocean becomes warmer than the eastern Indian Ocean.

The western Indian Ocean becomes cooler than the eastern Indian Ocean.

The western Indian Ocean shows drought conditions, while the eastern Indian

Ocean does not.

Atlantic

Pacific

Indian