Maps showing the dominant regional effect on sea ice seasonality of the West Ice Shelf Tongue (WIST).

<p>A). Days of sea ice advance for 2002, with April, June and August contours marked. B). Days of sea ice retreat for 2002/03, with November, December and January contours marked. C). Sea ice season duration for 2002/03, with the 100-, 200- and 300-day contours marked.