AdvertisementNASA Launches Mission To Track Polar Ice By PlanePlay04:44Download AudioOctober 30, 2009Jon HamiltonfacebookEmailMelting at the base of this Texas-sized ice pack in the Amundsen Sea off Antarctica could lead to significant ocean level rise in the long term. This image of the ice shelf was taken on the first flight of Ice Bridge from an altitude of 20,000 feet.