Stronger westerly winds in the Southern Ocean could be the cause of a sudden rise in atmospheric CO2 in a period of less than 100 years about 16,000 years ago, according to a study published in Nature Communications.
Stronger westerly winds in the Southern Ocean could be the cause of a sudden rise in atmospheric CO2 in a period of less than 100 years about 16,000 years ago, according to a study published in Nature Communications.
The westerly winds during that event strengthened as they contracted closer to Antarctica, leading to a domino effect that caused an outgassing of carbon dioxide from the Southern Ocean into the atmosphere.
This contraction and strengthening of the winds is very similar to what we are already seeing today as a result of human caused climate change.
“During this earlier period, known as Heinrich stadial 1, atmospheric CO2 increased by a total of ~40ppm, Antarctic surface atmospheric temperatures increased by around 5°C and Southern Ocean temperatures increased by 3°C,” said lead author Dr Laurie Menviel, a Scientia Fellow with the University of New South Wales (Sydney).
Read more at University of New South Wales
Image: Strengthening westerly winds close to Antarctica could lead to a significant spike in atmospheric CO2 as occurred 16,000 years ago. (Credit: Picture: Ameen Fahmy (Unsplash.com))
