Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3424501m&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 24, CiteID L24501
Other
84
Cryosphere: Sea Ice (4540), Global Change: Cryospheric Change (0776), Global Change: Abrupt/Rapid Climate Change (4901, 8408), Global Change: Regional Climate Change, Global Change: Oceans (1616, 3305, 4215, 4513)
Scientific paper
Satellite-derived estimates of sea-ice age and thickness are combined to produce a proxy ice thickness record for 1982 to the present. These data show that in addition to the well-documented loss of perennial ice cover as a whole, the amount of oldest and thickest ice within the remaining multiyear ice pack has declined significantly. The oldest ice types have essentially disappeared, and 58% of the multiyear ice now consists of relatively young 2- and 3-year-old ice compared to 35% in the mid-1980s. Ice coverage in summer 2007 reached a record minimum, with ice extent declining by 42% compared to conditions in the 1980s. The much-reduced extent of the oldest and thickest ice, in combination with other factors such as ice transport that assist the ice-albedo feedback by exposing more open water, help explain this large and abrupt ice loss.
Drobot Sheldon
Emery William
Fowler Charles
Maslanik James A.
Stroeve Julienne
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