David Buckland explains it much better than I. It has something to do with Cultural Change.  “Artists are a on the front-line of cultural change” he says   “Think the 1960’s and  the influence of the artists”. I think of the Andy Warhol exhibition at The Hayward Gallery.   The Arctic exemplifies the effects of Climate Change as  the edge of a 
shadow exemplifies the sharpness of  light.  We slept overnight in a hotel in Iceland and flew another three hours to Greenland where the ship awaits off the coast. Zodiac dinghy boats speed towards us skidding off the top of the waves:  We’re off.