Question

What was the cause of extreme cold in the USA in January and February 2019?

विकल्प

• Strengthening of Polar Vortex

• Weakening of Polar Vortex

• Extreme cold in Antarctica

• Depletion of Ozone layer

Answer 1

Weakening of Polar Vortex

Explanation:

The polar vortex is a large area of low pressure and cold air surrounding the Earth’s North and South poles. In January and February 2019, a severe cold wave caused by a polar vortex hit the midwestern  United States and eastern Canada. It came after a  winter storm that brought nearly 12 inches (30 cm) of snow in some parts of the region.