Telegraph: In the first half of a 620 mile journey to the Pole, the Catlin Arctic Survey led by Pen Hadow has reported that ice formed within the past year had an average thickness of 1.77m. A lack of thicker ice suggests that ice formed more than a year ago has either moved to a different part of the ocean or melted away meaning the ice cover will be even further reduced this summer. The findings come as Nasa warned that sea ice cover over the Arctic reached its lowest volume since …