Ocean acidification refers to the ongoing decrease in the pH of Earth’s oceans caused by the uptake of carbon dioxide (CO₂) from the atmosphere. As CO₂ levels increase due to human activities, more of it dissolves into seawater, forming carbonic acid, which lowers ocean pH and makes the oceans more acidic.
Change in Acidity: Since the industrial era, ocean acidity has increased by ~30%, with pH dropping from ~8.2 to ~8.1—an unprecedented rate in the last 50 million years.
Ocean acidification is a silent but serious consequence of climate change. It endangers marine life, disrupts global food chains, and affects millions of livelihoods. Urgent global action is needed to cut CO₂ emissions and protect ocean ecosystems. Sustainable fishing, marine protected areas, and public awareness are key to preserving our oceans for future generations.
Q1. What is the main cause of ocean acidification?
The main cause is the absorption of excess atmospheric CO₂ by the oceans, leading to the formation of carbonic acid.
Q2. How does ocean acidification affect marine organisms?
It reduces carbonate ions, making it difficult for organisms like corals and shellfish to form calcium carbonate structures.
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