Fig. 5
From: A dataset of the daily edge of each polynya in the Antarctic
Comparison between the traditional integration-based polynya frequency map and the result from our dataset for open-ocean polynyas: (a,b) Maud Rise polynya; (c,d) Cosmonaut polynya; (e,f) Cooperation polynya; (g,h) North Ross Sea polynya; (i,j) halos in the Maud Rise region in 2005 and 2018. All of their locations are marked on the map of Antarctica in the center of the figure. Panels (a), (c), (e), and (g) are the traditional open-water frequency maps integrated from 2003 to 2022. The red borders in (b), (d), (f), and (h) indicate the daily polynya edges obtained by our tracing method in our dataset; the yellow hatched areas indicate the open sea, and the yellow borders without hatching delineate other open waters. The base maps come from MODIS visible light images (b,d,f from MODIS/Terra; h,i,j from MODIS/Aqua). The time is indicated at the bottom of each subfigure.
