Last September, researchers in the UK launched a high-altitude weather balloon that released a few hundred grams of sulfur dioxide into the stratosphere, a potential scientific first in the solar geoengineering field, MIT Technology Review has learned.
Solar geoengineering is the theory that humans can ease global warming by deliberately reflecting more sunlight into space. One possible means is spraying sulfur dioxide in the stratosphere, in an effort to mimic a cooling effect that occurs in the aftermath of major volcanic eruptions. It is highly controversial given concerns about potential unintended consequences, among other issues.
The UK effort was not a test of or experiment in geoengineering itself. Rather, the stated goal was to evaluate a low-cost, controllable, recoverable balloon system, according to details obtained by MIT Technology Review. Such a system could be used for small-scale geoengineering research efforts, or perhaps for an eventual distributed geoengineering deployment involving numerous balloons.
The “Stratospheric Aerosol Transport and Nucleation,” or SATAN, balloon systems were made from stock and hobbyist components, with hardware costs that ran less than $1,000.
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