Scientists claim to have identified cleaner air on Earth above the Southern Ocean

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By: Express Web Desk | New Delhi |

Updated: June 3, 2020 1:55:05 p.m.





Aerosol filter samplers probe air over the Southern Ocean on the R / V investigator at the Australian Marine National Facility (Kathryn Moore / Colorado State University)
Colorado State University researchers believe they have found the cleanest air in the world, located over the Southern Ocean, CNN reported. The research team said that the atmospheric region above the ocean – which surrounds Antarctica – has not been affected by human activity.

As air quality continues to deteriorate steadily due to human activity, scientists and researchers are finding it difficult to find pockets across the Earth where air is unaffected by humans. Professor Sonia Kreidenweis and her team at Colorado State University identified one of these pockets in an unprecedented study on the composition of bioaerosols in the Southern Ocean.

The team found that aerosol particles – which are produced by human activity such as burning fossil fuels, planting certain crops, and producing fertilizers – were absent in the boundary layer, which powers the clouds. Lower over the Southern Ocean.

“The aerosols controlling the properties of SO (Southern Ocean) clouds are strongly linked to ocean biological processes, and Antarctica seems to be isolated from the southward dispersal of microorganisms and nutrient deposits from continents of the South, “Thomas Hill, co-author of the study, said in a statement.

The researchers traveled on a research vessel from Tasmania, Australia, to the edge of the Antarctic ice and sampled the air at sea limits – the part of the atmosphere that is in direct contact with the ocean, CNN reported.

According to The Weather Channel, 21 of the 30 most polluted cities in the world are in India. Ghaziabad in Uttar Pradesh was named the most polluted city in the world in 2019, according to the World Air Quality Report 2019. Hotan in China was second on the list and Delhi ranked sixth.

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