A record-breaking cold wave has swept through the US hitting sub-zero temperatures. Discuss the causal factor of this event and its link with the climate change. (150 Words)
Refer - The Indian Express
Enrich the answer from other sources, if the question demands.
IAS Parliament 6 years
KEY POINTS
· The extreme cold in USA has been caused by a blast of Arctic air, which in turn is a result of what is known as a “polar vortex” event.
· The Polar Vortex is essentially a low-pressure area, it is a wide expanse of swirling cold air surrounding both polar regions. The counter-clockwise flow of air helps keep the colder air near the poles.
· In winter, the polar vortex sometimes becomes less stable and expands. Many times during winter in the northern hemisphere, the [north] polar vortex will expand, sending cold air southward with the jet stream. This is called a polar vortex event, the “breaking off” of a part of the vortex.
Link with Climate Change:
· The jet stream, a meandering air current that flows over North America and Europe, is slowing and becoming wavier as the planet warms. The jet stream interacts with the polar vortex, helping bring numbing temperatures further south.
Scientists also point to a complex sequence of events involving sea ice, which is rapidly diminishing in the Arctic. As the ice retreats, summertime heat is absorbed by the dark ocean that lies underneath. This heat is released into the atmosphere during winter, spurring winds that can disrupt the polar vortex.
Keeran 6 years
Kindly review my answer sir
IAS Parliament 6 years
Good
answer. Try adding role of global
warming with respect to Jet stream. Keep Writing
Raj 6 years
Kindly Review. Thanks!!
IAS Parliament 6 years
Try providing a pictorial representation of the event. Keep Writing.
MURALIDHARAN 6 years
Pls review....
IAS Parliament 6 years
Good
answer. Try not using short form like Bcz. Keep Writing
Nandadeep 6 years
Kindly review.thanks
IAS Parliament 6 years
Good
answer. Try to add pictorial representations to enrich the answer. Keep Writing.
