Old, "multiyear" ice -- the glue that holds the polar ice cap
together and forms the Arctic's defense against encroaching warming --
is slowly disintegrating, a process that is plain to see from the air.
ice floes used to be kilometers (miles) wide just over a decade ago,
said Jim Overland, a sea-ice expert with the U.S. National Oceanic and
Atmospheric Administration, who has been surveying the site since the