Stig Östlund

tisdag, februari 14, 2017

Around the Arctic Circle, observers are reporting an outbreak of polar stratospheric clouds (PSCs). "Yesterday, Feb. 13th, the sky was filled with their brilliant colors from sunrise to sunset," says Mia Stålnacke, who sends this picture from Kiruna, Sweden:





These clouds are newsworthy because normally the stratosphere has no clouds at all. Home to the ozone layer, the stratosphere is arid and almost always transparent. Yet, Stålnacke says, "we've been seeing stratospheric clouds very often this winter and last."
According to multiple longtime residents of the area, the Feb 13th display was exceptional. "Everyone I spoke to agrees it was the best they had ever seen," says Chad Blakley, who operates the Lights over Lapland tour guide service in Abisko, Sweden.


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