The oceans play a pivotal role in drawing down atmospheric carbon dioxide (CO₂) and have so far acted as a brake on the full impact of climate change. Current estimates of the CO₂ from the atmosphere that disappears in the ocean, commonly referred to as the ocean CO₂ sink, suggests that around 25% of all human CO₂ emissions have been taken up by the oceans.
In our recent journal paper in Nature Geoscience, we show that a thin layer at the ocean surface called the “ocean skin”, a layer thinner than a human hair, increases this ocean CO₂ uptake by about 7%. That sounds like a small difference, but this additional uptake is equivalent to the CO₂ absorbed by the entire Amazon rainforest each year.
