Figure 3. Trajectory of the two tankers over the ESS based on AIS data. The routes cross the ESS from the Laptev Sea on 4 July 2014 to the port of Yamal on 31 July 2014, via the port of Pevek on 20 July 2014. The forward route is highlighted by green circles. The SIT (cm; colors) and SIC (%; contours) averaged over the period of the forward route are shown.