Blocking sunlight to an area 5-7 million sq miles, in a shape of a pie, with the center 100,000 sq miles left out. We have the technology to make a fabric of nano-tubes for strength, reflective or solar capability. It could be built on octagonal or triangular frames. Built with mini pulse engines to be used for directional correctness
If this is achievable we could effectively drop the polar temperature to the polar region of 5-7 million sq miles, in doing so force a freeze of sea ice. Keep it shaded for several years. If it were a gigantic solar collector it could be highly profitable.
I understand we can not have a satellite or object directly over the pole in a stationary orbit. Because it needs to be traveling at roughly 500 Km a second so gravity does not drag it down. But, could it be set into a much higher orbit that does not require forward momentum to stay in orbit?
Seems much more effective than placing millions of solar pumps on the ice-sheets drilling holes into the water underneath and pumping that water onto the glaciers. I see many issues with this plan, not to mention its a huge expense, and once you Swiss-cheese the glacier, I see many more melting issues, not to mention construction rigs, men housing, traffic on the glacier. Seems to me it is a pipe dream with vastly dangerous effects to the pole's environment.