The Variability of Arctic Sea Ice Extent from Spring to Summer and Its Linkage to the Decline of SIE in September

Figure 1

The time series of sea ice extent (SIE) differences and their linear curves (unit is millions of square kilometers) for 1979–2012: (a) for April minus May (AM), (b) for May minus June (MJ), (c) for June minus July (JJ), (d) for July minus August (JA), and (e) for August minus September (AS).

(a) SIE difference for Apr minus May

(b) SIE difference for May minus June

(c) SIE difference for June minus July

(d) SIE difference for July minus August

(e) SIE difference for Aug minus Sept