Last updated October 10, 2018

Arctic sea ice thickness loss determined using subsurface, aircraft, and satellite observations

  • Utilizes upward-looking sonars mounted on submarines or moorings, electromagnetic sensors on helicopters or aircraft, and lidar or radar altimeters on airplanes or satellites to monitor sea-ice thickness
  • Concludes that the annual global mean ice thickness has decreased from 3.59 m in 1975 to 1.25 m in 2012, a 65% reduction