"Ironically, global warming played no small part in undermining the entire expedition. We believed that the greater melting of summer ice would open up large areas of sea and allow us to paddle north at good speed. What we did not fully appreciate was that to the north of us there was a widespread melting of sea ice off the coast of Alaska and the New Siberian Islands and the ice was being pushed south towards us ... The evidence of climate change was stark. Fourteen months before I'd sailed north and I'd seen a preponderance of multi-year ice about three metres thick north of Spitsbergen, but this time most of the ice was just a metre thick."
