which then made me switch to second part of idea. midnight sun casts very long shadows for 90 days from 9pm to 3am.
Sun is close to horizon for 6 hours of the 24 hour daylight.
So shading Greenland cap, arctic and antarctic for six hours out of 24 hours for 90 days seems cheap and easy.
Shading equator is a no go due to 90 degree angle casting small shadow.
Next part of question becomes. If sun is 10 degrees about horizon and I have a 50 by 50 foot curtain
How big is the shadow? Far larger than 50 by 50 for sure.
Finally part of question is the sun at what angle during those 6 hours of the midnight sun time.
Seems to me not that hard to shade the fuck out of those ice sheets if we want to for 90 days a year during the summer in these cases.
Am I wrong that
https://www.amazon.com/Be-Cool-Solutions-Outdoor-Canopy/dp/B079KJHZZZ/ref=sr_1_1_sspa?
setting rows of these up could shade huge sections of ice during the summer months?
So this is a cheap fix can shade huge sections of ice for what millions of dollars? say a billion dollars and you shade 10 percent of greenland's ice cap.
Lots of nice info on why shading the pacific at the equator will not work.
But the second part of shading the icecaps and Greenland, for 6 of 24 hours during the summers seems more possible.
We have all seen the long shadows in the morning and the evening correct?
and the angle would be much different.
So I need to find angle of the sun during midnight suntime?
To see if it magnifies the shadows cast by the white shade cloth I linked here.
https://www.amazon.com/Be-Cool-Solutions-Outdoor-Canopy/dp/B079KJHZZZ/ref=sr_1_1_sspa?
if a 20 foot high cloth wall casts a 200 foot shadow and costs 10000 usd to make a mile long
26 of those walls make 1 square mile $250,000
104 make 4 square miles about 1 million bucks
4000 square miles about 1 billion bucks
400000 square miles about 100 billion bucks and ½ the size of Greenland gets 6 or more hours of shade during the midnight sun.