“We found the highest wind power densities over Japan and eastern China, the eastern coast of the United States, southern Australia, and north eastern Africa,” said researcher Cristina Archer, an atmospheric scientist at California State University in Chico.

These specific areas generate roughly 10 kilowatts per square meter or more. “This is unthinkable near the ground, where even the best locations have usually less than one kilowatt per square meter,” Archer added.

A number of technological schemes have been proposed to harvest energy from these high-altitude winds, including tethered, kite-like wind turbines lofted miles high. Up to 40 megawatts of electricity could be generated by current designs and transmitted to the ground via tether.