Recent Trends in Arctic Sea Ice and the Evolving Role of Atmospheric Circulation Forcing, 1979–2007 - Arctic Sea Ice Decline: Observations, Projections, Mechanisms, and Implications - page 13

Plate 3. Seasonal mean sea ice concentration (far left panels) climatologies based on the period 199-200 (percent)
and linear trends (percent per decade) during (left) 199-1993, (middle) 1993-200, and (right) 199-200. Data after
30 April 2006 are excluded. Seasons are defined as (first row) November-January (NDJ), (second row) February-April
(FMA), (third row) May-July (MJJ), and (fourth row) August-October (ASO). The white ellipse around the North Pole
indicates missing data.