Declining Sea Ice Extent

Declining Sea Ice Extent

Average September extent of Arctic sea ice in 1980 (second year of satellite record and year of greatest
September sea ice extent; outer red boundary), 1998 (about halfway through the time series; outer pink boundary) and 2012
(recent year of record and year of least September sea ice extent; outer white boundary). September is typically the month when
sea ice is least extensive. Inset is the complete time series of average September sea ice extent (1979-2013). (Figure
source: NSIDC 2012; Data from Fetterer et al. 20135ca69fe1-86e2-48e2-acc4-363efaf4402a).

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Oceans, Physical Climate, Observations, Arctic