Figure 1. Bouvetøya elephant seal tracks and seal-derived subsurface temperature maximum.
A) Tracks of 19 southern elephant seals instrumented at Bouvetøya (grey diamond) covering the period February -November 2008. Green tones = males, red tones = females. B) Positions of 8749 CTD profiles obtained throughout the tracking period. The color represents the temperature at the subsurface maximum (Tmax). The dark blue contour line represents the 0.8°C isotherm used to delineate between the Antarctic Circumpolar Current Regime (ACCR), Weddell Cold Regime (WCR) and Weddell Warm Regime (WWR). The delineation between the WWR and the Dronning Maud Land Shelf regime (SR) was based on the location of the Antarctic Slope front (ASF).