This idea of detonating bombs in near-space was proposed in 1957 by Nicholas Christofilos, a physicist at Lawrence Berkeley National Laboratory. His hypothesis, which was pursued by the [U.S.] Department of Defense's Advanced Research Projects Agency [subsequently known as DARPA] and tested in Project Argus and other nuclear shots, held that the debris from a nuclear explosion, mainly highly energetic electrons, would be contained within lines of force in Earth's magnetic field and would travel almost instantly as a giant current spanning up to half a hemisphere. Thus, if a detonation occurred above a point in the South Atlantic, immense currents would flow along the magnetic lines to a point far to the north, such as Greenland, where they would severely disrupt radio communications. A shot in the Indian Ocean might, then, generate a huge electromagnetic pulse over Moscow. In addition to providing a planetary "energy ray," Christofilos thought nuclear shots in space might also disrupt military communications, destroy satellites and the electronic guidance systems of enemy [intercontinental ballistic missiles], and possibly kill any military cosmonauts participating in an attack launched from space. He proposed thousands of them to make a space shield.
So nuclear explosions in space by the U.S. and the Soviet Union constituted some of the earliest attempts at geoengineering, or intentional human intervention in planetary-scale processes.
The neologism "geoengineer" refers to one who contrives, designs or invents at the largest planetary scale possible for either military or civilian purposes. Today, geoengineering, as an unpracticed art, may be considered "geoscientific speculation". Geoengineering is a subset of terraformation, which also does not exist outside of the fantasies of some engineers.
I have recently written to the Oxford English Dictionary asking them to correct their draft definition.
Can geoengineering save the world from climate change?
In short, I think it may be infinitely more dangerous than climate change, largely due to the suspicion and social disruption it would trigger by changing humanity's relationship to nature.
To take just one example from my book, on page 194: "Sarnoff Predicts Weather Control" read the headline on the front page of The New York Times on October 1, 1946. The previous evening, at his testimonial dinner at the Waldorf Astoria, RCA president Brig. Gen. David Sarnoff had speculated on worthy peaceful projects for the postwar era. Among them were "transformations of deserts into gardens through diversion of ocean currents," a technique that could also be reversed in time of war to turn fertile lands into deserts, and ordering "rain or sunshine by pressing radio buttons," an accomplishment that, Sarnoff declared, would require a "World Weather Bureau" in charge of global forecasting and control (much like the "Weather Distributing Administration" proposed in 1938). A commentator in The New Yorker intuited the problems with such control: "Who" in this civil service outfit, he asked, "would decide whether a day was to be sunny, rainy, overcast...or enriched by a stimulating blizzard?" It would be "some befuddled functionary," probably bedeviled by special interests such as the raincoat and galoshes manufacturers, the beachwear and sunburn lotion industries, and resort owners and farmers. Or if a storm was to be diverted—"Detour it where? Out to sea, to hit some ship with no influence in Washington?"
How old is the idea of geoengineering? What other names has it had?
I can trace geoengineering's direct modern legacy to 1945, and have prepared a table of such proposals and efforts for the [Government Accountability Office]. Nuclear weapons, digital computers and satellites seem to be the modern technologies of choice. Geoengineering has also been called terraformation and, more restrictively, climate engineering, climate intervention or climate modification. Many have proposed abandoning the term geoengineering in favor of solar radiation management and carbon (or carbon dioxide) capture and storage. Of course, the idea of control of nature is ancient—for example, Phaeton or Archimedes.