Fig. 2

(a) The typical area of each polynya, obtained as detailed in the main text (Section: Methods). To facilitate distinction, adjacent polynyas are marked with different colors. (b) Maps of frequent polynyas. A total of 35 frequent polynyas, defined as described in the main text (Section: Overview of the polynyas in the DEEP-AA dataset), are marked in the figure, with their numbers and names written at the bottom of the figure. Their IDs and interannual variation of size and lifespan are listed in Supplementary Figure 10. In both (a,b), we divide the Antarctic into two regions. The locations of these two regions are marked on the upper left side of the subfigures.