What are the 'nacreous clouds' lighting up the winter skies?
Wednesday, February 3, 2016 - 09:48
in Earth & Climate
People in the polar regions of the world, such as Scandinavia and Canada, sometimes get to watch majestic, rainbow-coloured clouds drift across an otherwise grey winter sky. Over the past few days, observers from across the UK and Ireland have also been lucky enough to witness this phenomenon, known as "nacreous" (or polar stratospheric) clouds.