|A farmer takes water from a dried-up pond to water his vegetable field during a drought in Jiangxi province. Photograph: Stringer Shanghai/Reuters|
It's called Solar Radiation Management. Weather modification.
A new study, published today in Environmental Research Letters, has highlighted the risks of large and spatially expansive temperature increases if solar radiation management (SRM) is abruptly stopped once it has been implemented.
SRM is a proposed method of geoengineering whereby tiny sulfate-based aerosols are released into the upper atmosphere to reflect sunlight and cool the planet. The technique has been shown to be economically and technically feasible; however, its efficacy depends on its continued maintenance, without interruption from technical faults, global cooperation breakdown or funding running dry.
According to the study, global temperature increases could more than double if SRM is implemented for a multi-decadal period of time and then suddenly stopped, in relation to the temperature increases expected if SRM was not implemented at all.
Lead author of the research, Kelly McCusker, from the University of Washington, said: "According to our simulations, tropical regions like South Asia and Sub-Saharan Africa are hit particularly hard, the very same regions that are home to many of the world's most food insecure populations. The potential temperature changes also pose a severe threat to biodiversity."
Read More: http://phys.org/news/2014-02-abrupt-geoengineering-method.html#jCp