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New Mexico to try to establish the possibility of cooling the planet by spreading sulphate aerosols

Two engineers at Harvard University have to spray the sun reflecting chemical particles into the atmosphere to cool the planet artificially, using a balloon flying above 80,000 feet at Fort Sumner, New Mexico.

experience on the ground in solar geoengineering aims to create the ultimate technology to reproduce the observed effects of volcanoes that spew sulphates into the stratosphere, using sulphate aerosols to bounce sunlight in space and by lowering the temperature of the Earth.

David Keith, one of the researchers, it has been argued that geoengineering could draw an economical method to curb global warming, but other scientists warn that it could have disastrous consequences and unpredictable weather systems of land supplies and food. Environmental groups fear that the momentum of a geoengineering 'plan B' for climate change will undermine efforts to reduce carbon emissions.

Keith, who runs a research fund geoengineering provided by billionaire Microsoft founder Bill Gates, already commissioned a study by American aerospace company made in the case of the feasibility of implementation large-scale solar geoengineering technologies.

United States

Their experiment conducted with American James Anderson, will take place in one year and result in the release of tens or hundreds of kilograms of particles to measure the impact on the chemistry of ozone and test ways to sulphate aerosols size. As it is impossible to simulate the complexity of the stratosphere in a laboratory, Keith said the experience will be an opportunity to improve models of how the ozone layer could be modified by a much larger scale spraying sulfate .

"The goal is not to change the climate, but simply to probe processes at the micro level," said Keith. "The direct risk is very low."

"Potential impacts include damage to the ozone layer, and disruption of the rainy season, especially in tropical and subtropical regions - potentially threatening the food supply of billions of people," Pat Mooney, Executive Director of ETC Group's technological Canada. "It will do nothing to reduce the level of greenhouse gas emissions in the atmosphere or ocean acidification and the sun stop geoengineering may increase the risk of climate-related international conflicts -. Given that the modeling to date shows that at higher risk for developing countries. "

A scientific study published last month concluded that solar radiation management could reduce rainfall by 15% in the region of North America and northern Eurasia and in more than 20 % in central South America.

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