Global Outlook for Ice & Snow

Northern Hemisphere, average sea ice extent 1979-2003

March

September

Southern Hemisphere, average sea ice extent 1979-2002

September

February

Figure 5.3: Maps of average sea-ice extent in the Arctic summer (September) and winter (March), and in the Antarctic summer (February) and winter (September). They represent average sea-ice extent from 1979 to 2002/2003, based on

passive microwave satellite observations. The two polar regions are drawn to the same scale. Source: Based on Stroeve and Meier 1999 updated 2005 3 (Antarctic); Armstrong and Brodzik 2005 4 (Arctic)

CHAPTER 5

ICE IN THE SEA

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