Via laser into the past of the oceans

Monday, February 23, 2015 - 15:00 in Earth & Climate

Next to global warming, ocean acidification is currently considered as the second major carbon dioxide problem. With the increase of carbon dioxide (CO2) in the atmosphere larger quantities of the gas are getting into the seawater, too. There it forms carbonic acid, which lowers the pH value of the oceans. The long-term effects of this process on marine ecosystems are still unknown. Research is facing a fundamental problem: Measurements of pH values in the oceans have started only a few decades ago, in some areas only a few years ago. What were the pH values organisms coped with 100, 200 or 1000 years ago?

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