Amount of old ice in Arctic, 1987-2013
Voir la publication de Mr Mondialisation
The winter ice pack in the Arctic was once dominated by multi-year*, thick ice. Today, very little old ice remains. This animation shows maps of sea ice age from 1987 through the end of October 2013. Age class 1 means « first-year ice, » which is ice that formed in the most recent winter. The oldest ice (9+) is ice that is more than 9 years old. Animation by NOAA climate.gov, based on research data provided by Mark Tschudi, CCAR, University of Colorado. *Revised on 2/21/14. Caption originally said « old. » Revised to « multi-year » to reduce ambiguity.
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