International ozone treaty stops changes in Southern Hemisphere winds

The video discusses the phenomenon of Antarctica's ozone hole and its impact on atmospheric circulation, including the shift of the mid-latitude jet stream. The Montreal Protocol, signed in 1987, aimed to phase out CFCs, which has helped halt the jet stream's southward drift. Researchers from the University of Colorado Boulder suggest that climate warming is pushing the jet stream south, while ozone layer recovery is counteracting this shift. Ozone depletion is also linked to the expansion of the southern hemisphere's tropical dry region, affecting rainfall in South America, East Africa, and Australia.

What is one of the effects of the ozone hole over Antarctica?

• It has increased the temperature in the northern hemisphere.

• It has caused more rainfall in the southern hemisphere.

• It has shifted the mid-latitude jet stream poleward.

• It has reduced the size of the polar ice caps.

What was the main goal of the Montreal Protocol signed in 1987?

• To reduce greenhouse gas emissions globally.

• To promote the use of alternative refrigerants.

• To phase out the use of chlorofluorocarbons (CFCs).

• To increase the use of CFCs in industrial applications.

According to a study published in Nature, what impact did the Montreal Protocol have on the jet stream?

• It accelerated the jet stream's drift to the north.

• It had no impact on the jet stream.

• It caused the jet stream to become more erratic.

• It halted the jet stream's drift to the south.

What do researchers at the University of Colorado Boulder believe is driving the jet stream towards the southern pole?

• Increased volcanic activity.

• Rising sea levels.

• Climate warming.

• Decreased solar activity.

How does ozone depletion affect the southern hemisphere's tropical dry region?

• It increases rainfall in the region.

• It leads to the southward expansion of the region.

• It has no effect on the region.

• It causes the region to shrink.