Wednesday, Apr 24 2024 | Time 04:19 Hrs(IST)
image
World


Climate change slowing Antarctic deep sea current, reducing oxy levels

Climate change slowing Antarctic deep sea current, reducing oxy levels

Canberra, May 26 (UNI) Deep ocean currents around parts of Antarctica are slowing down decades earlier than expected as a result of climate change, Australian research has revealed.

In a study published on Friday, a team from the Commonwealth Scientific and Industrial Research Organization (CSIRO) and Australian Center for Excellence in Antarctic Science (ACEAS) found that the Southern Ocean overturning circulation has slowed down by 30 per cent since the 1990s.

The findings were published only two months after a separate study that predicted the circulation would slow by 40 per cent by 2050.

Researchers said the new study showed the slowdown was already underway, warning of potential dire impacts including rising sea levels, altering weather patterns and depriving ecosystems of vital nutrients.

The circulation originates in cold dense waters off Antarctica's continental shelf and plays a key role in influencing the climate by driving a network of ocean currents that pump heat, carbon, oxygen and nutrients into the deep sea around the world.

"We're used to the idea that melting of the Antarctic Ice Sheet causes sea level rise. But this work also shows us that the impacts of melting glaciers in Antarctica extend all the way to the deep sea, affecting climate and ocean chemistry, as well as sea level," Steve Rintoul from CSIRO Environment said in a media release.

The change has been caused by melting of Antarctic glacial ice making water off the shelf fresher and more buoyant, reducing the amount of oxygen-rich water that can sink to the deep sea, and slowing the circulation.

Kathy Gunn, lead author of the study from ACEAS and CSIRO, said the freshening of the water is expected to accelerate as the Antarctic Ice Sheet is subjected to an increasingly warming climate.

"Because of this, we expect a continuing decline of the deep ocean circulation and its oxygen levels. These declines are already significantly changing the deep ocean's structure and chemistry," she said.
UNI/XINHUA AKS ARN

More News

Myanmar plans to cultivate 15 mln acres of monsoon paddy in FY 2024-25

23 Apr 2024 | 4:00 PM

Yangon, Apr 23 (UNI) Myanmar plans to cultivate over 15 million acres of monsoon paddy in fiscal year 2024-25, with an increase of over 8,000 acres from the previous year, a Department of Agriculture official said on Tuesday.

see more..

Over 240 tremors recorded off Taiwan's east coast over past 24 hours

23 Apr 2024 | 3:56 PM

Taipei, Apr 23 (UNI) Taiwan's east coast was shaken by more than 240 tremors over the past day, with the largest one measuring 6.3 in magnitude, data from the Central Weather Administration (CWB) showed on Tuesday.

see more..

42 officials punished over deadly fire in China's Shanxi

23 Apr 2024 | 3:47 PM

Taiyuan, April 23 (UNI) A total of 42 public servants have been punished over a fire that killed 26 people and injured 38 others at a coal mine company building in north China's Shanxi Province.

see more..

Five dead trying to cross from France to Britain in small boats

23 Apr 2024 | 3:41 PM

Paris, Apr 23 (UNI) At least five people died while trying to cross the English Channel to Britain off the coast of northern France on Monday night, French media reported.

see more..

At least 5 dead trying to cross from France to Britain in small boats

23 Apr 2024 | 3:31 PM

Paris, April 23 (UNI) At least five people died while trying to cross the English Channel to Britain off the coast of northern France on Monday night, French media reported.

see more..
image