‘Warm and crazy’ winter leaves ice at lowest level ever

It is the second year in a row in which the record has been broken for the lowest area of ice in winter — a time when cold temperatures see the ice sheet over the North Pole increase to a maximum extent before melting again during the summer.
This year, air temperatures over the Arctic Ocean for December, January and February were 2C to 6C (4F to 11F) above average in nearly every region, the US’s National Snow and Ice Data Centre (NSIDC) and Nasa experts said.