Prof. Yngve Kristoffersen.Prof. Yngve Kristoffersen will arrive in Longyearbyen on August 22nd 2015 with the hovercraft Sabvabaa after drifting across the inaccessible Arctic Ocean during one year. Together with Audun Tholfsen this FRAM-2014/15 ice drift station has made unique geological, sea ice, ocean and atmospheric measurements from the inaccessible Arctic Ocean during all four seasons.