Sign In
Learn bits
Ecology & Environment
Admin

09/01/21 08:00 AM IST

Antarctic ozone hole closes

In news

The annually occurring ozone hole over the Antarctic had rapidly grown from mid-August 2020 and peaked at around 24 mln sq km

How?
  • The expansion of the hole was driven by a strong, stable and cold polar vortex and very cold temperatures in the stratosphere.
  • The same meteorological factors also contributed to the record 2020 Arctic ozone hole, which has also closed.
  • A polar vortex is a wide expanse of swirling cold air, a low pressure area, in polar regions. During winters, the polar vortex at the North Pole expands, sending cold air southward.
  • An ozone hole is the thinning of the ozone layer boosted in size by colder temperatures.
  • As the temperatures high up in the stratosphere starts to rise, ozone depletion slows, the polar vortex weakens and breaks down. By the end of December, ozone levels return to normal. 
The Montreal Protocol on Substances that Deplete the Ozone Layer regulates production and consumption of nearly 100 chemicals referred (OSD). Since the ban on halocarbons, the ozone layer has slowly been recovering

More Related Current Affairs View All

15 Nov

Government issues guidelines to curb misleading ads by coaching centres

'The central Government issued new guidelines aimed at curbing misleading advertisements by coaching institutes, specifically prohibiting false promises such as "100 per cent selec

Read More

15 Nov

Janjatiya Gaurav Divas

'Every year on November 15th, Janjatiya Gaurav Divas is celebrated to honor the contributions of these communities, especially in India’s freedom struggle.' 5th November

Read More

15 Nov

Supreme Court’s order on mandatory accessibility standards

'A bench of the Supreme Court last week ordered the Union government to frame mandatory rules for ensuring the accessibility of public places and services to persons with disabilit

Read More

India’s First Ai-Driven Magazine Generator

Generate Your Custom Current Affairs Magazine using our AI in just 3 steps