×

UPSC Courses

DNA banner

DAILY NEWS ANALYSIS

  • 12 May, 2020

  • 5 Min Read

Polar vortex brings spring snow

Polar vortex brings spring snow to parts of North America

Part of: GS-I- Geography (PT-MAINS-PERSONALITY TEST)

Winter in May - snowfall covers parts of northeast United States and Canada. A polar vortex has brought cold weather and springtime snow to parts of the northeast United States and Canada.
The stream of arctic air slipped south on Saturday, bringing the unusual weather. In many areas, snow flurries fell against a backdrop of sunny skies, green trees and flowers. The US National Weather Service issued a freeze warning extending into early Sunday for most of the country's northeast.
Parts of New Jersey woke up to a rather cold surprise on Saturday with a dusting of snow as temperatures in some areas of the US state dropped to below zero degrees Celsius.

What it is?

Recently, the United States is grappling with extreme cold with temperature reaching to -30°C in cities like Chicago and Dakota.

  • This is caused by a blast of Arctic air, which is a result of a “polar vortex” event.
  • The polar vortex is a large area of low pressure and cold air surrounding both of the Earth’s poles. It was also known as the Polar Pig.
  • The term "vortex" refers to the counterclockwise flow of air that helps keep the colder air near the Poles. It always exists near the poles, but weakens in summer and strengthens in winter.
  • However, many times during winter in the northern hemisphere, the polar vortex will expand, sending cold air southward. This occurs fairly regularly during wintertime and is often associated with large outbreaks of Arctic air in the United States and portions of Europe and Asia.
  • It is also not a feature that exists at the Earth’s surface, rather it exists tens of thousands of feet up in the atmosphere.
  • By itself, the only danger to humans is the magnitude of how cold temperatures will get when the polar vortex expands, sending Arctic air southward into areas that are not typically that cold.

How is it Linked to Global Warming

  • The global temperature has risen by 0.8°C since 1880.
  • The Arctic has warmed over twice the average.
  • The temperature difference between North Pole and regions like North America has reduced.
  • The energy generated by the jet stream travels upward and disrupts the polar vortex, causing it to split.
  • One of these two "child" vortices has visited North America this week, causing the record temperatures.

Source: AIR


Great Barrier Reef’s Recovery and Vulnerability

Great Barrier Reef’s Recovery and Vulnerability An annual long-term monitoring report on the Great Barrier Reef's recovery and susceptibility to climate threats was just made public by the Australian Institute of Marine Science (AIMS). In-water and airborne methods are used to survey the reefs. Key finding   &n

Council of Scientific and Industrial Research

Council of Scientific and Industrial Research Nallathamby Kalaiselvi, a senior electrochemical scientist, has been named the Council of Scientific and Industrial Research's first female Director General. Her appointment is for a period of two years with effect from the date of assumption of charge of the post or until further orders, w

Significance OF Tribes

Significance OF Tribes Every year on August 9th, there is a celebration known as World Tribal Day or International Day of the World's Indigenous Peoples. Its objectives are to advance and defend the rights of all indigenous peoples worldwide and to recognize their contributions to global issues like environmental preservation. Back

Pharmacopoeia Commission for Indian Medicine

Pharmacopoeia Commission for Indian Medicine The Pharmacopoeia Commission for Indian Medicine & Homoeopathy (PCIM&H) has been formed by the Indian government as a subsidiary office under the Ministry of Ayush.  The Pharmacopoeia Commission of Indian Medicine & Homoeopathy (PCIM&H) and the two central laboratories, Homoeo

Governing Telecommunication in India

Governing Telecommunication in India The Ministry of Communication, Department of Telecommunications (DoT) recently issued an invitation for comments regarding the requirement to update the legal framework governing the telecom sector. It also published a consultation document in which it advocated for the creation of a new legal framework th

Toppers

Search By Date

Newsletter Subscription
SMS Alerts