Sometimes deep into the wintertime , afterwards sunset or earlier dawn , sheets of unbelievably brilliant as well as vividly colored clouds tin hold upward seen forming against the partially nighttime twilight sky. This rare type of cloud formations are known every bit “polar stratospheric clouds” or “nacreous clouds” , as well as they tin solely hold upward seen from high latitude regions such every bit Republic of Iceland , Alaska , Northern Canada , the Scandinavian countries as well as Antarctica. The Scandinavians telephone telephone them “mother of pearls” because of their spectacular iridescent colors. Described every bit “one of the virtually beautiful of all cloud formations ,” nacreous clouds are too the virtually destructive to our atmosphere. Their presence encourages a chemic reaction that breaks downward the ozone layer , which is an essential shield protecting us from the sun's harmful rays.
Upside Down Rainbows and Fire Rainbows
Ozone Hole Watch / Atoptics / The Guardian