Average extent of arctic sea ice in March and September 1979-2007
: Nov 12, 2009
: Oct 23, 2008
: Nov 29, 2012 11:38 AM
Arctic sea ice grows to its greatest yearly size in March and melts to its lowest size in September
This is the latest published version.
The figure shows the average ice extents for these two months after 1979. The linear trend for March indicates that the Arctic is losing an average of 44 000 km2 of ice per year in winter. The corresponding value for September and summer is 72 000 km2.
Geographical coverage: Arctic and the North pole
Atmospheric concentration of Nitrous Oxide (ppb)
Projections for combined changes in temperature and precipitation
Socio-economic projections for the European Union