World’s “bluest” sky is in Brazil (2006)
physicsworld.com
physicsworld.com
I'm italian, born and lived in Bari and now in Milan, and I assure you that the color of the sky is really different between the two cities (~800km apart each other)
This is more of a puff piece, one off trials on hazy days, and none of the pictures compare to the depth of blue I’ve seen in some skies.
Reverse engineering it I’d think about what increases blue intensity, or decreases and work out where the optimum place might be.
Interesting thing is, I think the sky from Brasilia is more blue than other cities... is this maybe because of the altitude? Recife/Maceio/RJ are from 0 altitude, but Brasilia is 1000 meters.
I had similar thought when I visited Lake Titicaca (3812m surface elevation) and looked up while standing on a small hill on the shore - the sky had super deep blue shade at the zenith, even at noon. Very uncanny, I'd not seen anything like that before or since.
I guess it was a combination of lower air density, high altitude, little air pollution and great horizon distance letting me notice contrast between white sky in the distance and dark blue sky right above. Last point would explain why I have never seen this effect in even higher mountains.