Scientists confirm oceans acidifying at unprecedented speed
The acidification of the world’s oceans, caused by the absorption of huge volumes of carbon dioxide, is accelerating at an unprecedented rate, threatening marine ecosystems and the livelihoods of tens of millions of people, concluded scientists attending the Second International Symposium on the Ocean in a High CO2 World held in Monaco from 6-9 October. … “Our oceans are sick. We don’t quite know how sick, but there is enough evidence now for us to say that ocean chemistry in changing, that as a result some marine organisms will be affected, and that decision makers need to sit up and take notice,” said James Orr of the IAEA and Chairman of the meeting. … “Since the industrial revolution, the acidity of ocean surface waters has increased by 30 percent. This change is greater and happening about 100 times faster than for previous acidification events experienced in many millions of years,” said Dr. Orr. “Published research indicates that by 2030, the Southern Ocean will start to become corrosive to the shells of some marine snails that swim in surface waters. These snails provide a major source of food for Pacific Salmon. If they decline or disappear in some regions, such as the North Pacific, what will happen to the salmon – and the salmon fishing industry? And what will happen as ocean acidification increasingly affects coral reefs, which are home to one-quarter of the world’s fish during at least part of their lifetime, and which support a multi-billion dollar tourist industry?” he continued.
