Extended Data Fig. 1: Overview of campaigns (1993–2012).
From: Smoother sea ice with fewer pressure ridges in a more dynamic Arctic
Maps showing the flight activities over sea ice during individual campaigns from 1993 to 2012. Coloured dots show segments (10 km each) where surface elevation data were collected, with the colour indicating the age of the ice surveyed (see legend in Extended Data Fig. 2). The drift path of the sea ice from its origin (black dots) to the survey site is shown as coloured trajectories.
