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Adding Iron to Ocean Won't Stop Climate Change
An ambitious plan to slow global warming by locking CO2 deep in the ocean has hit a stumbling block, according to a new study that shows the geoengineering technique is not as effective as scientists had previously hoped.
"The amount of carbon dioxide that could be taken up is less than we assumed," said Victor Smetacek, a scientist at Alfred Wegener Institute who co-led the expedition. Don't discount ocean fertilization yet however, say scientists working both inside and outside the research study.
"With other climate change initiatives, ocean fertilization could still play a role in reducing climate change," said Smetacek.
The idea behind ocean fertilization is a simple one. Carbon dioxide is slowly raising the average temperature of the Earth. If some of the carbon dioxide in the atmosphere could be removed the Earth wouldn't heat up as fast.
Scientists have come up with a wide variety of plans to remove CO2 from the atmosphere. Some scientists want to pump C02 deep into the underground. Others want to use carbon nanotubes to turn CO2 into methane or other compounds.
