Antarctic ozone hole is healing, confirms IIT Kharagpur study

Iit kharagpur, antarctic ozone hole, climate change, global warming, ozone layer, cfc

limate change and global warming are the number one discussion points on Earth now. We swing from hopefulness to hopelessness with various findings showing how Earth is definitely warming drastically with grave consequences coming very soon.

Meanwhile, researchers at IIT Kharagpur have given environmental evangelists a reason to rejoice.

A research team from the Center of Oceans, Rivers, Atmosphere and Land Science (CORAL) at IIT Kharagpur has come up with new data confirming that the Antarctic Ozone Hole is on a healing path.

“We have observed over the past four decades the ozone layer depletion peaked during winters each year except the warm winters of 1988 and 2002,” confirmed Jayanarayanan Kuttippurath, a professor at IIT Kharagpur.

“However, our analysis shows a clear reduction in the frequency of occurrence of ozone loss saturation over the period 2001-2017 consistently throughout various datasets. This reveals the emergence of an important milestone in ozone recovery,” he added.

Read: Ozone depletion caused largest ever mass extinction, finds study: Facts on the 5 extinction events of Earth

How was the study on the Antarctic ozone hole conducted?

  • The researchers collected data from 1979 to 2017, which showed though there was a loss in saturation of Ozone since 1987 over the Antarctic; the saturation of loss at 12-21 km has significantly reduced over the period 2001-2017
  • Over the decades, from Autumn to Spring, data were collected from stations across Antarctica and from different altitudes — including measurements from the Indian station Maitri
  • The reduction of ozone loss saturation in recent years ranged from 20% to 60% across the data spread
  • This is the first of its kind research providing detailed long-term (four decades) analysis of Antarctic ozone loss saturation in terms of its first occurrence, timing, spatial differences, vertical spread, inter-annual changes, and temporal evolution using high-resolution ozonesondes and satellite measurements inside the vortex for the said period
  • The study was conducted by Jayanarayanan Kuttippurath along with Pankaj Kumar, Prijitha J Nair and PC Pandey from the IIT KGP CORAL team
  • The study was published this month in the prestigious Springer Nature’s Climate and Atmospheric Science journal