Scientists identify cleanest air on the Earth | the Earth


The Southern Ocean. Image via Spartan and the green egg.

Researchers have identified Land, cleaner air, free of particles caused by human activity – in a region in the South Ocean off the coast of Antarctica.

The weather and climate are complex processes that connect every part of the world to all the rest of the region. A team of climate scientists from Colorado State University were curious to see to what extent the particles produced by the human industry and activity of reach. To find out, which sailed from Tasmania, in the Southern Ocean surrounding Antarctica below 40 degrees south latitude, and measures the bio-aerosols in the composition of the particles in the atmosphere – on several points.

Map of Antarctica with the surrounding ocean, marked 'Southern Ocean.'

Location of the Southern Ocean. Image through the Encyclopaedia Britannica.

Measurements were taken of the boundary layer, a part of the lower part of the atmosphere that is in direct contact with the surface of the ocean and reaches as high as 1.2 miles (1.9 km) in the atmosphere.

The study, published in the June 1, 2020, in the peer-reviewed journal Proceedings of the National Academy of Sciences, find the limit of the layer of air that feeds the bottom of the clouds over the Southern Ocean to be a virgin, free from particles, called aerosols, connected to pollution, human or other activity or transported from distant lands.

The ship of railing and the equipment mounted on it with the backdrop of the sunset and the sea.

Aerosol filter samplers, probe the air over the Southern Ocean, in Australia’s National Marine Center’s R/V Investigator. Image via Kathryn Moore/ University of the State of Colorado.

The researchers said that it is difficult to find any area or process in the Land untouched by people. The scientists suspected that the air directly on the remote control of the Southern Ocean surrounding Antarctica would be the least impacted by humans, and the dust of continents. Set out to discover what was in the air and where it came from. The Colorado State University research scientist Thomas Hill is a co-author of the study. Hill said in a statement:

We have been able to use the bacteria in the air over the Southern Ocean as a diagnostic tool to infer key properties of the lower atmosphere. For example, aerosols control the properties of Southern Ocean clouds are strongly linked to the ocean’s biological processes, and that Antarctica seems to be insulated from to the south of the dispersion of microorganisms and the deposition of nutrients from the southern continents. In general, it is suggested that the Southern Ocean is one of the few places on Earth that have been minimally affected by anthropogenic activities.

These results counter other studies of the oceans in the subtropics and in the Northern Hemisphere, which found that the majority of the microbes came from upwind continents.

Bottom line: A new study suggests that the cleanest air on the Earth free of pollution from human activities – is located in a region of the Southern Ocean that surrounds Antarctica.

Source: bacteria carried by the Air to confirm the pristine nature of the area South of the Ocean boundary layer

Through Colorado State University

Eleanor Imster

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