Indian Ocean Dipole Concepts

The Indian Ocean Dipole (IOD) is a climate phenomenon similar to El Nino, affecting global weather patterns. It has three phases: positive, negative, and neutral, each impacting weather differently. A positive IOD causes flooding in East Africa and droughts in Indonesia and Australia, while a negative IOD reverses these effects. The IOD's influence extends globally, affecting regions like the UK. Climate change may increase extreme IOD events.

What is the Indian Ocean Dipole (IOD) similar to?

• The El Nino phenomenon

• The Arctic Oscillation

• The Southern Oscillation

• The Atlantic Oscillation

When was the Indian Ocean Dipole (IOD) discovered?

• 1989

• 1999

• 2009

• 2019

What happens during a positive phase of the IOD?

• Warmer waters on the western side of the Indian Ocean

• Cooler waters on the western side of the Indian Ocean

• Warmer waters on the eastern side of the Indian Ocean

• Increased rainfall in eastern Africa

Which region experiences drought during a positive IOD?

• Eastern Africa

• Indonesia and Australia

• Western Africa

• South America

What characterizes a negative phase of the IOD?

• Warmer waters on the western side of the Indian Ocean

• Warmer waters on the eastern side of the Indian Ocean

• Cooler waters on the eastern side of the Indian Ocean

• Increased rainfall in eastern Africa

During a negative IOD, which region is likely to experience flooding?

• Indonesia and parts of Australia

• Eastern Africa

• South America

• Western Africa

What is the impact of a neutral phase of the IOD?

• No significant impact on weather patterns

• Increased rainfall in eastern Africa

• Increased rainfall in Australia

• Drought in Indonesia

What was a significant consequence of the extremely positive IOD in 2090?

• Drought in South America

• Increased snowfall in Europe

• Severe fire season in Australia

• Flooding in Western Africa

How does a positive IOD affect the North Atlantic Oscillation (NAO)?

• Leads to a positive NAO

• Leads to a negative NAO

• Has no effect on NAO

• Leads to a neutral NAO

What was observed in the UK during early 2020 due to a positive IOD?

• Drier weather

• Increased temperatures

• Wetter and windier weather

• Increased snowfall