There was rising acidity levels of the continental shelves in Antarctic Marine Protected Areas (MPA) under high levels of greenhouse gas emissions.
Carbon emissions from human activities may be vertically mixed with ocean waters in coastal regions, resulting in severe acidification at all water levels.
The study named Severe 21st-century ocean acidification in Antarctic Marine Protected Areas.
The ocean helps to mitigate the effects of global warming by absorbing some of the carbon dioxide gas (CO2) that is released into the atmosphere.
The pH scale could decline by up to 0.36 (on the total scale) for the top 200metres of the ocean by 2100.