Nacreous clouds or polar stratospheric clouds. On the last day of the year those clouds could be seen on the Lofoten islands in northern Norway. These clouds are characterized by a strong iridescence. Their height is determined at about 15-25 km, where the temperature is -80 degrees Celsius. Clouds are formed with a small amount of water vapor that leaked to the upper parts of the atmosphere. The droplets are much smaller than those that typical building clouds. They scatter the light differently, that is why the color of the clouds reminds rainbow. Those clouds occur very rarely.
Bartlomiej Jurecki is a graduate of the Cracow School of Art and the State Higher School of Film, Television and Theatre in Lodz, where he earned his Master of Photography.