I first went to Greenland in 1993 to get above tree line. I’d been hit by lightning and was back on my feet after a long two-year recovery. Feeling claustrophobic, I needed to see horizon lines, and off I went with no real idea of where I was going. A chance meeting with a couple from west Greenland drew me north for a summer and part of the next dark winter. When I returned the following spring, the ice had failed to come in. I had planned to travel up the west coast by dogsled on the route that…