Crossing open water during the Arctic Arc expedition

Crossing open water or 'leads' during the Alain Hubert's 1600 km Arctic Arc 2007. The 106-day trek across the floating Arctic sea-ice took Alain and fellow explorer Dixie Dansercoer from Russia to northern Greenland via the North Pole – a route never before attempted. Despite the gruelling conditions, Alain and Dixie to the time to take snow-depth measurements that make a valuable contribution to the validation programme for ESA's ice mission CryoSat.