Oceans Absorbing Less CO2 May Have 1,500 Year Impact

Global oceans are soaking up less carbon dioxide, a development that could speed up the greenhouse effect and have an impact for the next 1,500 years, scientists said on Wednesday.

Research from a five-year project funded by the European Union showed the North Atlantic, which along with the Antarctic is of the world’s two vital ocean carbon sinks, is absorbing only half the amount of CO2 that it did in the mid-1990s.
Scientists are still debating the reasons why oceans are absorbing less carbon dioxide. While some point to CO2 saturation, others say it could be caused by a change in surface water circulation, triggered by changes in weather cycles.

Heinze described a “bottleneck effect” because of the large amount of manmade carbon dioxide oceans already store.

“The more CO2 the oceans store, the more difficult it will be for them to take up the additional load from the atmosphere and carbon absorption will stagnate even further,” Heinze said.

Some forms of sea life have suffered from the large amounts of CO2 absorbed, because of changes in acidity levels.

“The seafloor is becoming an increasingly hostile environment,” said Marion Gehlen, from the Laboratory of Climate and Environment Science in France.

“This corrosive water means mollusc organisms have a hard time making their shells and eventually they might not be able to do it at all.”

For the scientists there is only one thing humans can do to resolve the problem — reduce emissions by at least 75 percent.

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