Carbon dioxide has been pumped underground and turned rapidly into stone, demonstrating a radical new way to tackle climate change.
The unique project promises a cheaper and more secure way of burying CO2 from fossil fuel burning underground, where it cannot warm the planet. Such carbon capture and storage (CCS) is thought to be essential to halting global warming, but existing projects store the CO2 as a gas and concerns about costs and potential leakage have halted some plans.
The new research pumped CO2 into the volcanic rock under Iceland and sped up a natural process where the basalts react with the gas to form carbonate minerals, which make up limestone. The researchers were amazed by how fast all the gas turned into a solid – just two years, compared to the hundreds or thousands of years that had been predicted.
“We need to deal with rising carbon emissions and this is the ultimate permanent storage – turn them back to stone,” said Juerg Matter, at the University of Southampton in the UK, who led the research published on Thursday in the journal Science.
Matter said the only thing holding back CCS was the lack of action from politicians, such as putting a price on carbon emissions: “The engineering and technology of CCS is ready to be deployed. So why do we not see hundreds of these projects? There is no incentive to do it.”
Continue reading “CO2 Turned Into Stone In Iceland In Climate Change Breakthrough”
A new study from the University of Exeter, published in the journal Ecology Letters, found that phytoplankton — microscopic water-borne plants — can rapidly evolve tolerance to elevated water temperatures. Globally, phytoplankton absorb as much carbon dioxide as tropical rainforests and so understanding the way they respond to a warming climate is crucial.
Phytoplankton subjected to warmed water initially failed to thrive but it took only 45 days, or 100 generations, for them to evolve tolerance to temperatures expected by the end of the century. With their newfound tolerance came an increase in the efficiency in which they were able to convert carbon dioxide into new biomass.
The results show that evolutionary responses in phytoplankton to warming can be rapid and might offset some of the predicted declines in the ability of aquatic ecosystems to absorb carbon dioxide as the planet warms.
Continue reading “Don’t Forget Plankton In Climate Change Models”
Northern boreal forests are easily recognized for their majestic trees and have been credited with helping to sequester much of the world’s carbon dioxide. It was originally thought that vegetative matter was what was sinking the greenhouse gas. Now, a diverse team of scientists from Sweden have discovered that these great, soaring plants are getting a lot of help from some humble decomposers living in the soil. Their findings, published in the journal Science, revealed that fungi were responsible for up to an incredible 70 percent of soil carbon in certain samples.
Researchers have long known that boreal forests were able to suck up a good deal of carbon, but were previously unclear as to where it went and how it was absorbed. They had thought that the carbon was carried to the tree’s needles and dropped to the forest floor where decomposition would leech it into the environment. If that were true, they would expect to find the newest carbon deposits close to the surface. However, after taking soil samples from over 30 islands and two small lakes in Sweden, they saw that the new deposits were more likely to be found farther down, pulled to the roots of the trees by fungus. The mycorrhizal fungus has evolved a special relationship with the trees where it colonizes in the roots and assists the tree. The fungus gets access to a more consistent stream of carbohydrates and other sugars, and the tree in return has access to more water and minerals.
Continue reading “Fungi Is Responsible For Majority Of Carbon Sequestration In Forests”