Saturday, January 26, 2013

geoengineering method could reduce emissions, but requires a huge effort and mining change the balance of the ocean

billion tons of mineral powder spray over the oceans could quickly remove large amounts of carbon dioxide to global warming, according to a new study.

The proposed "geo-engineering" technique also offset ocean acidification and can be directed to coral reefs endangered, but would require an effort on mining large-scale coal in the world and alter the biology of the oceans.

"is certainly not a simple solution to the problem of global warming," said Peter K?hler, at the Alfred Wegener Institute for Polar and Marine Research in Bremerhaven, Germany, who led the study. It would take 100 large vessels operating throughout the year to distribute tons of mineral olivine 1BN, although it may be possible to use water ballast in the existing transport instead.


- global intervention in the fight against climate change - is a controversial idea because of the risk of unintended consequences globally. But scientists say it should be studied in the case of international efforts to reduce emissions of greenhouse gases from human activities can not avoid radical changes in weather and emergency measures.

use powder mineral geoengineering could have some advantages over the main type of alternative, injecting sulfate particles into the atmosphere to block sunlight. "Thanks to atmospheric geoengineering, once you start, you must go. Let this be a dramatic increase of the heating of a magnitude not know if emisisons not been reduced carbon, "said K?hler.

Instead of temporarily block the sun's heat, the approach eliminates the mineral powder carbon dioxide from the atmosphere, then stop spraying dust not only mean more carbon was removed. It also helps reduce ocean acidification, K?hler.

But he said it would be very difficult to conclude international agreements necessary to begin spraying the dust, even if it was proven safe and could be financed.
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