Solar Geoengineering Projects Could Be More Effective on
Regional Scale A new modeling study by several geoengineering
experts suggests that injecting aerosols into the atmosphere to
block more of the sun’s energy and reduce temperatures could be
most effective when done on a region-by-region basis. The study,
published in the journal Nature Climate Change, said that
injecting aerosols over the Arctic Ocean in summer, for example,
might be an effective way to not only slow the rapid loss of
Arctic sea ice but possibly even restore it to pre-industrial
levels. The researchers — led by David Keith of Harvard
University, Ken Caldeira of the Carnegie Institution for
Science, and Douglas McMartin of the California Institute of
Technology — cautioned that their models were rough and that
bringing about changes in regional climate patterns can have
global effects. But they said the study shows the need for more
detailed research into how solar geoengineering techniques could
be used to slow or reverse the effects of